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31results about How to "Improve high voltage performance" patented technology
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Lithium-ion battery electrolyte and lithium ion battery with the same
InactiveCN106450438AImprove interface propertiesImprove stabilitySecondary cellsDecompositionLithium electrode
The invention belongs to the technical field of lithium-ion batteries, and discloses a lithium-ion battery electrolyte and a lithium ion battery with the same. The lithium-ion battery electrolyte is prepared from an organic solvent, conductive lithium salt and an additive; the additive is prepared from a common additive and a phosphoric acid ester additive, and the phosphoric acid ester additive has the structural formula shown in the formula (I) (please see the specification). According to the lithium-ion battery electrolyte, the phosphoric acid ester additive is added, the interface characteristics of the electrode / electrolyte of the lithium-ion battery can be improved, the stability is improved, interface impedance is reduced, the cycling stability, the high-temperature performance and the high-voltage performance of the lithium ion battery are improved accordingly, gas generation caused by organic solvent decomposition is inhibited, and expansion of the battery is reduced.
Owner:GUANGZHOU TINCI MATERIALS TECH
Positive electrode material of high-capacity dynamic-type nickel-rich lithium ion battery and preparation method thereof
ActiveCN103606671AStable structureImprove cycle performanceCell electrodesMaterials processingLithium-ion battery
The invention relates to a positive electrode material of a high-capacity dynamic-type nickel-rich lithium ion battery and a preparation method. The molecular formula of the positive electrode material of the high-capacity dynamic-type nickel-rich lithium ion battery is LiaNi1-x(MM')xO2.M''O, wherein a is equal to 0.9-1.2, x is more than or equal to 0 and less than or equal to 0.7, and M is at least one of Co, Mn and Al; M' is at least one of Co, Al, V, Mn, Zr, Mg, Ti, Cr, Zr, La, Ce, Pr, Nd, Nb, Mo, Y, Sr, Ba, B, Sr, Sn and Ta; M''O is a cladding layer, and M'' is Co and Al. The invention also relates to a preparation method for the positive electrode material of the high-capacity dynamic-type nickel-rich lithium ion battery. The material machining performance is excellent, the battery prepared by utilizing the material, the cycling performance and the high-voltage performance are excellent, the safety and stability in use can be realized, not only can the application performance requirement of a portable electronic device on the battery be met, but also the positive electrode material is applicable to the power battery.
Owner:HUNAN SHANSHAN ENERGY TECH CO LTD
High-voltage lithium ion battery electrolyte, preparation method and application of electrolyte
InactiveCN103956517AReduce decompositionImprove high voltage performanceFinal product manufactureElectrolyte accumulators manufactureOrganic solventSolvent
The invention discloses high-voltage lithium ion battery electrolyte, a preparation method and application of electrolyte. The high-voltage lithium ion battery electrolyte comprises an organic solvent, conductive lithium salt and a functional additive, wherein the organic solvent is prepared from a cyclic carbonate solvent, a fluoro solvent and a linear carbonic ester solvent, the content of the fluoro solvent in the high-voltage lithium ion battery electrolyte is 0.1-40wt.%, the content of the functional additive is 0.01-5wt.%, and the concentration of the conductive lithium salt in the organic solvent is 0.8-1.5mol / L. According to the high-voltage lithium ion battery electrolyte, the interfacial property of the anode and the cathode of the battery and the electrolyte can be improved, and the stability of the electrolyte can be improved, so that the cycle life of the high-voltage lithium ion battery is prolonged, the high-temperature property of the high-voltage lithium ion battery is improved and the working voltage of the high-voltage lithium ion battery is increased to be above 4.5V.
Owner:SOUTH CHINA NORMAL UNIVERSITY
Gradient type monocrystal-like positive electrode material and preparation method thereof
InactiveCN109962233AImprove thermal stabilityImprove conductivityCell electrodesSecondary cells servicing/maintenanceChemistryNickel salt
The invention discloses a gradient type monocrystal-like positive electrode material and a preparation method thereof. The general chemical formula of the gradient type monocrystal-like positive electrode material is LiNixCoyMn (1-x-y) AnO2, wherein 0.5<=x<=0. 8, 0.1<=y<=0.2, 0<=n<=0. 3. The gradient type ternary precursor NixCoyMn (1-x-y) (OH)2 is prepared by the method. The change of the concentration of the added nickel salt solution, the cobalt salt solution and the manganese salt solution is controlled to gradually reduce the nickel content and gradually increase the cobalt and manganesecontent in the components from the core to the surface of the precursor, and the particle size of the precursor is controlled to be 2-5um. The step-by-step sintering mode is used and beneficial to theindustrial production and can reduce the inconsistency of the obtained product. Finally, the obtained gradient type monocrystal-like lithium nickel cobalt manganate positive electrode material has good discharge performance and cycle performance at the high voltage of 4.5V.
Owner:GEM WUXI ENERGY MATERIAL CO LTD +2
Positive electrode material, and preparation method thereof and lithium ion battery
PendingCN112820861AImprove high voltage performanceImprove cycle stabilityCell electrodesSecondary cellsElectrical batteryLithium-ion battery
The invention provides a positive electrode material, and a preparation method thereof and a lithium ion battery. The positive electrode material comprises a substrate and a coating layer coating the substrate, the substrate is a high-nickel ternary material, and the coating layer is a composite oxide coating layer containing Al, Co and Mn. The preparation method comprises the following steps: 1) mixing a matrix precursor with a lithium source, and calcining to obtain a matrix material; (2) mixing an aluminum source, a cobalt source and a manganese source in a dissolving agent, adding a coprecipitator, standing for reaction, and then carrying out solid-liquid separation to obtain a coating material; and 3) mixing the base material and the coating material, and performing heat treatment to obtain the positive electrode material. The positive electrode material provided by the invention can well solve the safety problem and the cycle stability problem of a high-nickel ternary material, reduces the residual alkali amount on the surface of the positive electrode material, and has the advantages of low residual alkali, low mixing degree, high conductivity, high capacity, high cycle efficiency and the like.
Owner:SHENZHEN CITY BATTERY NANOMETER TECH
High voltage electrolyte containing benzonitrile additive and preparation method of high voltage electrolyte
InactiveCN108390097AEnsure structural stabilityInhibit oxidative decompositionSecondary cellsOrganic electrolytesDecompositionMethyl carbonate
The invention discloses high voltage electrolyte containing a benzonitrile additive, and a preparation method of the high voltage electrolyte. The high voltage electrolyte is prepared from the following raw materials in parts by mass: 1 part of cyclic carbonate, 1 part of linear carbonate diethyl carbonate, 1 part of ethyl methyl carbonate, 1 part of inorganic conductive lithium salt and 1 part ofadditive benzonitrile. The high voltage performance can be improved by adding the benzonitrile additive, a dense and uniform low-impedance protective film can be formed on the surface of a positive electrode material during battery cycling, and the protective film can inhibit the oxidative decomposition of the electrolyte solvent and can maintain the structural stability of the positive electrodematerial. The high voltage electrolyte is reliable in effect; the high-voltage functional additive benzonitrile is added into the electrolyte, so that the stability of a lithium ion battery is improved under high voltage; the method is simple, the operation is simple, the addition amount is small, and the high voltage electrolyte is practical and economical.
Owner:QINGYUAN JIAZHI NEW MATERIAL RES INST CO LTD +1
Electrolyte for high-voltage lithium ion battery
InactiveCN110707358AImprove electrochemical stabilityImprove high voltage performanceFinal product manufactureElectrolyte accumulators manufactureElectrolytic agentOrganosolv
The invention provides an electrolyte for a high-voltage lithium ion battery as well as a preparation method and application of the electrolyte. The electrolyte can improve the high-voltage performance of the lithium ion battery. The high-voltage electrolyte for the lithium ion battery comprises a non-aqueous organic solvent, a lithium salt and an electrolyte additive, the electrolyte additive comprises a disulfuryl compound, lithium difluorophosphate and tris (trimethylsilyl) phosphate, the bis-sulfonyl compound can form a stable SEI film on the surface of a positive electrode, the lithium difluorophosphate can improve the Li < + > conductivity of the SEI film, and the tris (trimethylsilyl) phosphate has the higher electrochemical stability, so that the oxygenolysis of the electrolyte onthe surface of an electrode is prevented. Through the synergistic effect among the bis-sulfonyl compound, the lithium difluorophosphate and the tri (trimethylsilyl) phosphate, the prepared electrolyteis more stable in property under a high voltage, and the battery shows better cycle performance under the high voltage.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
High-voltage stable electrolyte for lithium-ion battery
ActiveCN105449277AImprove electrochemical stabilityAvoid destructionSecondary cellsOrganic electrolytesOrganic solventDecomposition
The invention discloses a high-voltage stable electrolyte for a lithium-ion battery. The electrolyte comprises an organic solvent, a lithium salt and an additive, wherein the additive comprises a symmetrical biphenyl compound containing double sulfonic groups and a fluoro-sulfite compound. According to the electrolyte, high-voltage stable and compact interfacial films are simultaneously formed on the surfaces of a positive electrode and a graphite negative electrode, so that oxidative decomposition of the electrolyte is suppressed; recycling of the lithium-ion battery in a high-voltage condition can be met; and the service lifetime of the electrolyte is prolonged.
Owner:南宁翌思达新能源科技有限公司
Non-aqueous electrolyte, preparing method of non-aqueous electrolyte and lithium secondary battery
ActiveCN104064810AImprove wettabilityIncrease migration rateFinal product manufactureElectrolyte accumulators manufactureOrganic solventPhysical chemistry
The invention discloses a non-aqueous electrolyte, a preparing method of the non-aqueous electrolyte and a lithium secondary battery. The non-aqueous electrolyte mainly comprises an organic solvent, conductive lithium salt and an additive. The organic solvent is composed of cyclic carbonate and a linear carbonic ester solvent. The concentration of the conductive lithium salt in the organic solvent is 0.8-1.5 mol / L, the additive is one or more of compounds, of which the dosage is 0.01-8.0 percent by weight, shown in the following general formula (1), and the formula can be seen in the specifications. The compounds are added into the non-aqueous electrolyte so that the service life of a lithium ion battery can be prolonged, the high voltage (larger than 4.2 V) can be improved, the high and low temperature performance can be enhanced, and the air expansion problem of the battery can be solved.
Owner:GUANGZHOU TINCI MATERIALS TECH
Calcium zirconate and tantalum doped potassium sodium niobate-based piezoelectric ceramic and preparation method and application thereof
InactiveCN111072385AImprove high voltage performanceExcellent piezoelectric propertiesZirconateTantalum
The invention belongs to the field of preparation of ceramic materials, and particularly relates to calcium zirconate and tantalum doped potassium sodium niobate-based piezoelectric ceramic and a preparation method and application thereof. The high piezoelectric property of the KNN-based piezoelectric ceramic can be greatly improved through the CaZrO3-doped potassium sodium niobate-based ceramic,and the d33 of the CaZrO3-doped KNN-based ceramic at 160 DEG C is greater than or equal to 200Pc / N. Meanwhile, tantalum ions are doped into the CaZrO3-KNN-based ceramic so that the CaZrO3-KNN-based ceramic still keeps good piezoelectric property and temperature stability under the condition that high-density lead-free ceramic is obtained.
Owner:INNER MONGOLIA METAL MATERIAL RES INST
Ternary lithium ion battery and preparation method thereof
ActiveCN110875497AStable structureImprove cycle stabilityFinal product manufactureElectrolyte accumulators manufactureElectrolytic agentLithium-ion battery
The invention relates to the technical field of ternary lithium ion secondary batteries, and particularly discloses a ternary lithium ion battery electrolyte which comprises a functional additive, a solvent and inorganic conductive lithium salt, wherein the functional additive. The invention further discloses an application of the electrolyte containing the functional additive. In the invention, the functional additive is added into the electrolyte. Serving as a film-forming additive, the functional additive can form a layer of uniform and compact coating film on the surface of the positive electrode of the lithium ion battery, so that the oxidative decomposition of an electrolyte solvent and the corrosion of an electrolyte and lithium salt decomposition product HF to an electrode materialare inhibited, the structure of the positive electrode material is stabilized, the dissolution of transition metal ions is inhibited, and the cycling stability and the rate performance of the lithiumion battery at high voltage and high temperature are improved.
Owner:CENT SOUTH UNIV
Composition for preparing solid polymer electrolyte and application thereof
PendingCN114039088AImprove thermal stabilityHigh voltageSolid electrolytesFinal product manufacturePolymer electrolytesElectrolytic agent
The invention relates to the field of lithium ion batteries, in particular to a composition for preparing a solid polymer electrolyte and application thereof. The composition comprises a nonflammable electrolyte and a monomer containing unsaturated double bonds, wherein the mass percentage content of the monomer containing the unsaturated double bonds in the composition is 1-50%. The composition provided by the invention has high thermal stability and high voltage resistance, and can be used for preparing a solid polymer electrolyte and a lithium ion battery which has the characteristics of high voltage, high safety, difficulty in volatilization, difficulty in inflation, nonflammability and the like. Besides, the composition has the advantages of high flash point, high boiling point, high voltage resistance, low viscosity and the like, and the safety of the soft package battery can be remarkably improved; and the polymer electrolyte is further prepared by adopting an in-situ curing technology, so that the safety of the high-voltage soft package lithium ion battery is doubly guaranteed.
Owner:CHINA AUTOMOTIVE BATTERY RES INST CO LTD +1
Electrolyte for high-voltage lithium ion battery
InactiveCN110707359AImprove high voltage performanceImprove cycle performanceSecondary cellsOrganic electrolytesElectrolytic agentImide
The invention provides an electrolyte for a high-voltage lithium ion battery as well as a preparation method and application of the electrolyte. The electrolyte can improve the high-voltage performance of the lithium ion battery. The high-voltage electrolyte for the lithium ion battery comprises a non-aqueous organic solvent, a lithium salt and an electrolyte additive, and the electrolyte additivecomprises a bis (sulfonyl) compound, lithium bis (trifluoromethanesulfonyl) imide and fluoroether, wherein the dosage of the bis-sulfonyl compound is 0.1 wt%-5wt% of the total weight of the electrolyte, the dosage of the lithium bis (trifluoromethanesulfonyl) imide is 0.1 wt%-2wt% of the total weight of the electrolyte, and the dosage of the fluoroether is 0.5 wt%-10wt% of the total weight of theelectrolyte. The lithium ion battery electrolyte can effectively improve the cycle performance of the lithium ion battery in a high-voltage environment, and the internal resistance change of the battery is small.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Process for generating multi-step trench transistor using polymer isolation layer
InactiveCN111446167AIncrease the areaCommission performanceSemiconductor/solid-state device manufacturingSemiconductor devicesEtchingEngineering
The invention discloses a process for generating a multi-step trench transistor by using a polymer isolation layer. The process comprises the steps of S1 etching a first trench on a silicon wafer substrate; S2 performing oxidation operation on a primarily processed transistor, and generating a silicon oxide protection layer on the inner side wall of the first trench; S3 depositing and forming an organic silicon film layer on the silicon oxide protection layer of the first trench by a spin coating method; S4 carrying out plasma treatment by using fluorine-containing gas; S5 continuously etchingthe Si layer of the silicon wafer substrate downwards at the bottom of the first trench; S6 removing the organic silicon thin film layer at the bottom of the first trench by adopting a wet etching process; and S7 taking the second trench as a substrate, and continuing to repeat the steps S2 to S6, so that the plurality of trenches are in a multi-step shape in sequence. The design structure of theplurality of trenches obtains a larger transistor area in the same packaging volume, so that the quiescent current passing capacity and the high voltage bearing capacity are improved, and the maximized effective transistor area can be improved by more than three times.
Owner:绍兴同芯成集成电路有限公司
High voltage resistant electrolyte solution with double boron imide lithium
ActiveCN103700882AImprove stabilityIncrease capacity percentageSecondary cellsOrganic electrolytesLithium-ion batteryElectrolyte
The invention provides high voltage resistant electrolyte solution with double boron imide lithium. The electrolyte solution comprises four compositions: organic solvent comprising double boron imide lithium, other lithium, carbonate ester and / or ether, other functional additive and high-voltage additive. The molar concentration of the lithium with double boron imide lithium and the high-voltage additive in the electrolyte solution is 0.001-2mol / L, the molar concentration of the other lithium in the electrolyte solution is 0-2mol / L, and the molar concentration of other functional additive in the electrolyte solution is 0-0.5mol / L. The lithium with double boron imide lithium is an ionic compound, and the positive ions are lithium ions. The electrolyte solution provided by the invention has double boron imide lithium and greatly improves the cryogenic property and the high voltage performance of the electrolyte solution. After the electrolyte solution is applied to a lithium battery at a high temperature of higher than 50 DEG C or a low temperature of lower than minus 20 DEG C, the percentage of the volume of the battery is improved, and the circulating life and the storing life of the lithium battery are prolonged.
Owner:SHANDONG HIRONG POWER SUPPLY MATERIAL
Lithium ion battery high-voltage electrolyte and preparation method and application thereof
InactiveCN108091935AEnsure structural stabilityInhibit oxidative decompositionFinal product manufactureElectrolyte accumulators manufactureCyclic processDecomposition
The invention discloses a lithium ion battery high-voltage electrolyte and belongs to the technical field of lithium ion secondary materials. The lithium ion battery high-pressure electrolyte comprises a functional additive, a solvent and an inorganic conductive lithium salt. The functional additive comprises at least one of compounds having the structural formula 1. In R1, R2, and R3, at least one of the substituents is F, SR4, P(R5)R6, C2-C16 alkene, C2-C16 alkyne or CN, and the other substituents are C1-C6 alkane, Br, Cl, I, C1-C6 alkoxy, F, S, C2-C16 alkene, C2-C16 alkyne or CN. R4, R5 andR6 represents H or C1-C6 alkane. The invention also discloses an application of the electrolyte. The functional additive is added in the electrolyte and can form a dense coating film on the surface of the positive electrode of the lithium ion battery so that the electrochemical activity of the surface of the positive electrode material during the cycle is reduced, the oxidative decomposition of the electrolyte solvent is inhibited, the positive electrode material structure is stable and the cycle stability and rate performance of the lithium ion battery under high voltage are improved.
Owner:CENT SOUTH UNIV
Aluminum oxide protection silver nanowire transparent electrode, production method and application thereof
ActiveCN112768140AImprove high temperature resistanceImprove high voltage performanceConductive layers on insulating-supportsApparatus for heat treatmentElectrolytic agentFlexible electronics
The invention discloses an aluminum oxide protection silver nanowire transparent electrode, a production method and an application thereof. The method comprises the following steps: by taking an annealed silver nanowire transparent conductive film as a cathode, a platinum electrode as an anode, a silver / silver chloride electrode as a reference electrode and a solution containing aluminum nitrate nonahydrate as an electrolyte, electrically depositing an aluminum oxide protective layer on the silver nanowire transparent conductive film in a constant-voltage mode of a three-electrode system, rinsing, and annealing to obtain the aluminum oxide protection silver nanowire transparent electrode. According to the invention, an electro-deposition process is improved by controlling a reaction rate, aluminum oxide is accurately deposited on the surfaces of the silver nanowires without influencing a light-transmitting area, contact between the silver nanowires is promoted through the deposition process, light absorption of a coating layer is avoided through the high-flatness surface, the stability and a photoelectric property are improved, the silver nanowire protection process is greatly simplified, the production cost of the flexible transparent electrode is greatly reduced, and the development of flexible electronics is promoted.
Owner:SOUTH CHINA UNIV OF TECH
A kind of aromatic polyoxadiazole fiber mica insulating paper and its preparation method and application
ActiveCN105155328BImprove high temperature resistanceImprove high voltage performancePaper/cardboardPaper-making machinesSlurryHigh voltage
The invention discloses an aromatic polyoxadiazole fiber mica insulating paper. According to the mass percentage, its raw material composition is: 3% to 70% of aromatic polyoxadiazole fiber, 2% to 50% of aromatic polyoxadiazole fiber Polyoxadiazole precipitated fiber, 28% to 95% mica. The POD fiber and POD precipitated fiber are subjected to ultrasonic and piezoelectric effect treatment, and then matched with mica scales in proportion, mixed evenly, stabilized pulp, cylinder paper machine, and shaped; finally, POD fiber mica is obtained by hot pressing Paper products or directly get POD fiber mica paper products. It improves the high temperature resistance and high voltage performance of single POD fiber paper; improves the mechanical strength and impact resistance (corona resistance) of single mica paper, and is a new type of insulating material integrating the characteristics of POD fiber and mica. It can be widely used in various large electrical equipment, engines, special purposes and civil applications that require insulation.
Owner:JIANGSU ZANPOD NEW MATERIAL CO LTD
Process for generating multi-step trench transistor by using silicon nitride isolation layer
ActiveCN111477546AIncrease the areaCommission performanceSemiconductor/solid-state device manufacturingSemiconductor devicesO2 plasmaSilicon oxide
The invention discloses a process for generating a multi-step trench transistor by using a silicon nitride isolation layer. The process comprises the following steps: S1, etching a first trench on a silicon wafer substrate; S2, placing a primarily processed transistor in an oxidation furnace tube, carrying out oxidation operation, and generating a silicon oxide protective layer on the inner side wall of the first trench; S3, forming a silicon nitride film layer on the silicon oxide protective layer of the first trench through deposition by using a chemical vapor deposition process; S4, carrying out plasma treatment by using fluorine-containing gas to form a side wall; S5, continuously etching the Si layer of the silicon wafer substrate downwards at the bottom of the first trench to form asecond trench; and S6, removing the silicon nitride film layer at the bottom of the first trench by an O2 plasma process to form a double-trench structure. According to the invention, the multi-trenchdesign structure obtains a large transistor area in the same packaging volume, so that the quiescent current passing and high voltage bearing capacities of multiple trenches are increased, and the maximized effective transistor area can be increased by three times.
Owner:绍兴同芯成集成电路有限公司
Electrolyte additive, electrolyte and lithium secondary battery
PendingCN114583271AAvoid decompositionImprove high temperature storageSecondary cellsOrganic electrolytesHigh temperature storageElectrolytic agent
The invention discloses an electrolyte additive containing thiazolyl, amino and cyano, an electrolyte additive containing the additive and a lithium ion battery. The structure of the electrolyte additive is as shown in a structural formula I in the specification. The additive contains three effective groups, namely an imidazolyl group, an amino group and a nitrile group. Both thiazolyl and amino have alkalescence, so that HF in the electrolyte can be effectively reduced, precipitation of transition metal ions in the positive electrode of the lithium ion battery is reduced, and the stability of the positive electrode and an electrolyte interfacial film is enhanced; the cyano group can be complexed with transition metal of the positive electrode of the lithium ion battery to form a film on the surface of the positive electrode, and the interfacial film can effectively inhibit decomposition of electrolyte and reduce precipitation of transition metal ions. Therefore, the battery system containing the additive has better high voltage resistance, normal temperature and high temperature cycle performance and high temperature storage performance.
Owner:SOUTH CHINA NORMAL UNIVERSITY
A kind of nonaqueous electrolytic solution and its preparation method and a kind of lithium secondary battery
ActiveCN104064810BImprove wettabilityIncrease migration rateFinal product manufactureElectrolyte accumulators manufactureOrganic solventSolvent
Owner:GUANGZHOU TINCI MATERIALS TECH
A kind of ternary lithium ion battery and preparation method thereof
ActiveCN110875497BImprove cycle stabilityLower impedanceFinal product manufactureElectrolyte accumulators manufactureElectrolytic agentElectrical battery
The technical field of the ternary lithium ion secondary battery of the present invention specifically discloses the electrolyte solution of the ternary lithium ion battery, which includes a functional additive, a solvent and an inorganic conductive lithium salt; the functional additive. The invention also discloses the application of the electrolyte solution containing functional additions. In the present invention, adding the functional additive in the electrolyte, as a film-forming additive, can form a layer of uniform and dense coating film on the surface of the positive electrode of the lithium-ion battery, inhibiting the oxidative decomposition of the electrolyte solvent and The electrolyte and lithium salt decomposition product HF corrode the electrode material, stabilize the structure of the positive electrode material, inhibit the dissolution of transition metal ions, and improve the cycle stability and rate performance of lithium-ion batteries at high voltage and high temperature.
Owner:CENT SOUTH UNIV
A kind of electrolyte solution containing double boron imide lithium lithium salt against high voltage
ActiveCN103700882BImprove stabilityIncrease capacity percentageSecondary cellsOrganic electrolytesImideOrganic solvent
Owner:SHANDONG HIRONG POWER SUPPLY MATERIAL
Electrolyte, preparation method and application of electrolyte, lithium ion battery and application of lithium ion battery
InactiveCN109411820AImproved High Voltage PerformanceImpedance stabilitySecondary cells servicing/maintenanceSolventDecomposition
The invention provides an electrolyte, a preparation method and application of the electrolyte, a lithium ion battery and application of the lithium ion battery, and belongs to the technical field ofelectrolytes. The electrolyte provided by the invention is prepared from an additive, inorganic conductive lithium salt and a solvent, wherein the additive is fluorine-containing phosphate, and the chemical formula of the fluorine-containing phosphate is M1xM21-0.5xPO3F and / or M1PO2F2. The electrolyte containing the fluorine-containing phosphate is used in the lithium ion battery, the electrochemical activity of the surface of a positive electrode material can be reduced in a circulation process, oxidative decomposition of the solvent of the electrolyte is inhibited, the structure of the positive electrode material is stabilized, and the cycling stability and the rate performance of the lithium ion battery under high voltage are improved.
Owner:GUANGDONG JIANA ENERGY TECH CO LTD +1
An electrolyte solution for improving the high-voltage performance of lithium batteries
ActiveCN103700883BImprove high voltage performanceImprove high voltage cycle lifeSecondary cellsOrganic electrolytesOrganic solventPhysical chemistry
The invention provides an electrolyte for improving the high voltage performance of a lithium battery. The electrolyte comprises four components of a lithium salt, a carbonic ester and / or ether organic solvent, a high voltage additive and other functional additives, wherein the molar concentration ranges of the lithium salt and the high voltage additive are both 0.001-2 mol / L, and the molar concentration ranges of other functional additives are 0-0.5 mol / L. According to the electrolyte provided by the invention, the high voltage additive is added into the electrolyte of the lithium battery to improve the stability of the electrolyte at the high voltage, thereby being favorable for prolonging the high voltage cycle life of the lithium battery and inhibiting the swelling of the lithium battery.
Owner:SHANDONG HIRONG POWER SUPPLY MATERIAL
Non-aqueous electrolyte, preparation method thereof, and a lithium-ion battery
ActiveCN104051788BProtect the positive and negative polesIncrease migration rateElectrolyte accumulators manufactureAluminium-ion batterySodium-ion battery
Owner:GUANGZHOU TINCI MATERIALS TECH
A kind of preparation method of lithium iron phosphate/graphene oxide/platinum composite electrode material
InactiveCN106058187BMild reaction conditionsEasy to operateCell electrodesSecondary cellsMaterials scienceHigh voltage
The invention discloses a preparation method of a lithium iron phosphate / graphene oxide / platinum composite electrode material and belongs to the field of electrode materials. Graphene oxide is firstly dispersed in the mixed acid of concentrated sulfuric acids for treatment, the treated graphene oxide is dispersed in platinum chloride and is irradiated by using an ultraviolet lamp, filter residues obtained through separation is dispersed in deionized water, is irradiated by using the ultraviolet lamp and then is dried to obtain graphene oxide supported platinum particles, a hydrothermal method is utilized to prepare lithium iron phosphate particles, then the lithium iron phosphate particles are dispersed in water, the graphene oxide supported platinum particles are added to dispersion liquid, stirring, mixing and drying are performed, the dried product is subjected to high-temperature treatment, and then the composite material is obtained. The reaction conditions are mild, the operating process and a process are simple, a generated conductive composite layer can obviously improve the rate capability, the prepared composite material can obviously improve the rate capability of batteries, the high voltage performance is good, the product purity is high, and the cost is lower.
Owner:董忠贵
Non-aqueous electrolyte additive, non-aqueous electrolyte and lithium-ion battery
ActiveCN111490293BImprove high voltage performanceStable film structureSecondary cells servicing/maintenanceElectrolytic agentAqueous electrolyte
The invention provides a novel cyclic phosphate additive, a nonaqueous electrolytic solution containing the same and a lithium ion battery. The additive is a compound represented by formula (I), wherein X is C or S, R is C 1‑4 Alkyl or C 1‑4 alkoxy. The non-aqueous electrolyte containing the compound represented by formula (I) as an additive can improve the high-voltage performance of the battery, and is especially suitable for lithium-ion batteries in which the ternary material is the positive electrode and the silicon-carbon material is the negative electrode.
Owner:DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
Electrolyte additive for improving high-temperature performance of lithium battery, electrolyte and electrochemical device
ActiveCN113659200AImprove high temperature performanceImprove high voltage performanceSecondary cells servicing/maintenanceOrganic electrolytesCharge and dischargeLithium battery
The invention discloses an electrolyte additive for improving the high-temperature performance of a lithium battery, an electrolyte and an electrochemical device. The electrolyte additive comprises at least one selected from a compound I or a compound II with a structure shown in the description, and the electrolyte additive can relatively improve the capacity retention ratio of a lithium battery containing the electrolyte additive at high temperature, and also can improve the capacity retention ratio at relatively high temperature and charge-discharge voltage.
Owner:XIAMEN HAICHEN NEW ENERGY TECH CO LTD
A high-capacity power nickel-rich lithium-ion battery cathode material and preparation method thereof
ActiveCN103606671BSuppress lattice distortionImprove structural stabilityCell electrodesMaterials processingLithium-ion battery
The invention relates to a positive electrode material of a high-capacity dynamic-type nickel-rich lithium ion battery and a preparation method. The molecular formula of the positive electrode material of the high-capacity dynamic-type nickel-rich lithium ion battery is LiaNi1-x(MM')xO2.M''O, wherein a is equal to 0.9-1.2, x is more than or equal to 0 and less than or equal to 0.7, and M is at least one of Co, Mn and Al; M' is at least one of Co, Al, V, Mn, Zr, Mg, Ti, Cr, Zr, La, Ce, Pr, Nd, Nb, Mo, Y, Sr, Ba, B, Sr, Sn and Ta; M''O is a cladding layer, and M'' is Co and Al. The invention also relates to a preparation method for the positive electrode material of the high-capacity dynamic-type nickel-rich lithium ion battery. The material machining performance is excellent, the battery prepared by utilizing the material, the cycling performance and the high-voltage performance are excellent, the safety and stability in use can be realized, not only can the application performance requirement of a portable electronic device on the battery be met, but also the positive electrode material is applicable to the power battery.
Owner:HUNAN SHANSHAN ENERGY TECH CO LTD
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