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46results about How to "Good fast charge and discharge capability" patented technology

Preparation method of carbon-lithium titanate double-layer coated silicon negative electrode material

The invention belongs to the secondary lithium ion battery key material technical field, and provides a method for preparing a carbon-lithium titanate double-layer coated silicon negative electrode material. With chelating agents as carbon sources, a soluble Ti compound as a titanium source, a nano silicon source and various lithium compounds as lithium sources, the carbon-lithium titanate double-layer coated silicon negative electrode material is synthesized by a double-chelating-agent sol-gel method. Through combination of advantages of lithium titanate and the silicon material, a prepared lithium ion battery has high specific capacity, excellent cycling stability and quite high consistency, allows the high specific capacity and the high stability to be organically gathered together, and has wide application prospects.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH

Method for the preparation of high rate lithium ion capacitor battery cathode material by pyrolyzing asphalt at low temperature to cover graphite

The invention relates to a method for the preparation of high rate lithium ion capacitor battery cathode material by pyrolyzing asphalt at low temperature to cover graphite, belonging to the technical field of the preparation of energy storage material. The invention comprises the steps that: first, mixed solution containing graphitizing catalyst, water and alcohol is formulated, then graphite, asphalt powder and conductive agent are added therein for being mixed for several hours, the resultant mixture is dried in an atmosphere of the air, the asphalt is then pyrolyzed in an atmosphere of Ar or N2, and in the end, salpeter solution is used to remove the graphitizing catalyst by means of dissolution, and the high rate lithium ion capacitor battery cathode material with pyrolyzed asphalt covering the graphite is obtained by sufficient washing and drying. The cathode material obtained according to the method has the characteristics of high capacity and good high rate performance, is simple in process flow and includes tremendous application value.
Owner:CENT SOUTH UNIV

Preparation method of lithium titanate composite negative electrode materials used by lithium ion batteries

The invention discloses a preparation method of lithium titanate composite negative electrode materials used by lithium ion batteries, which is characterized in that the method comprises the following steps: proportionally mixing Li2CO3 powder and TiO2 powder; then, adding organic solvents into the mixture to be simultaneously prepared into paste materials; drying the paste materials after ball milling; raising the temperature; preserving the temperature; carrying out ball milling after cooling to obtain Li4Ti5O12; adding Li4Ti5O12 into metal compounds to simultaneously carry out ball milling; and then, completing the preparation through drying, temperature rising, temperature preservation, cooling and fine grinding. The lithium titanate of the composite negative electrode materials of the lithium ion batteries prepared by the method of the invention can adopt a general formula of Li4Ti5O12 / MOx, wherein x is 1 when M is Cu, and x is 0 when M is Ag. The lithium titanate can be used as the negative electrode materials of the lithium ion batteries, and has the advantages of good fast charging and discharging capability, high safety performance, no pollution and excellent large-magnification charging and discharging performance. The invention is applicable to industrial production, and can be applied to the fields of electric automobiles, energy storing equipment and electric tools.
Owner:HEFEI UNIV OF TECH

Titanium acid lithium battery cathode material containing rare metal elements

InactiveCN102054963AImprove fast charge and discharge performanceHigh electrochemical capacityCell electrodesIndustrial scaleRare-earth element
The invention relates to titanium acid lithium battery cathode material containing rare metal elements, which comprises a synthesized lithium titanate material. A or a plurality of rare metal elements are contained in the lithium titanate material; the rare metal elements adopt Zr, Al, La, Ce, Pr, Nd, Sm and Dy or Ho; the contents of the rare metal elements are 0.01-3 wt percent by oxidate; the lithium and titanium molar ratio in the lithium titanate material is 0.7-1.2; and the titanium acid lithium battery cathode material is produced by adopting the processes of material mixing, ball milling and sieving, high-temperature treatment, secondary ball milling, high-temperature heat preservation and the like. The titanium acid lithium battery cathode material containing the rare metal elements is doped with the rare metal elements, improves the quick charging and discharging properties, improves the electrochemical capacity and has excellent cycle performance, good repeatability and high consistency; and furthermore, the titanium acid lithium battery cathode material has the advantages of low raw material cost, short synthesis time, low temperature, low requirements for equipment and simple manufacturing process and is suitable for industrial scale production.
Owner:RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD

Composite conductive paste, preparation method and use thereof

InactiveCN109830685AOvercome the Difficulty of ScatteringGood dispersionCell electrodesSecondary cellsConductive pasteCarbon nanotube
The invention relates to a composite conductive paste, a preparation method and use thereof. The composite conductive paste of the invention comprises a composite material composed of a carbon nanotube and grapheme. The grapheme is less-layer graphene (10-20 layers), and the carbon nanotube is a multi-walled carbon nanotube. The composite conductive paste solves the problem that the two nanomaterials including the carbon nanotube and the graphene are difficult to disperse. The prepared composite conductive paste has good electrical conductivity and a resistivity of 32[omega].cm to 35[omega].cm. An electrode pole piece prepared from the composite conductive paste of the invention has high electrical conductivity, can improve the electrical conductivity and the electrochemical performance ofthe whole battery. An assembled battery has good fast charge and discharge performance, good reversibility and stability.
Owner:哈尔滨万鑫石墨谷科技有限公司

Accumulator and its preparing method

This invention relates to an accumulator, comprising the following steps: joining the positive plate, baffle plate, negative plate and electrolytic solution in the cell housing, wherein, the positive and negative plates is formed by coating active material on both sides of the metallic base, and one lateral side of at least one of the positive and negative plates is located with metallic net embedded in the lateral side of the plate. The invention has the advantages of simple structure of accumulator plate, lower essential resistance, higher discharge capacity and simple preparing method.
Owner:SHANGHAI BYD

TiO2-coated graphite composite particle for lithium ion battery, and preparation method and application thereof

The invention provides a TiO2-coated graphite composite particle for a lithium ion battery and a preparation method and application thereof. The method comprises the following steps: (1) mixing spherical graphite with TiO2 sol with stirring so as to obtain mixed slurry; and (2) drying and granulating the mixed slurry by using spray granulation equipment under the protection of inert gas, taking a cyclone material with a median particle diameter of 5 to 15 mu m and subjecting the cyclone material to heat treatment at a temperature of 400 to 800 DEG C under the protection of inert gas; wherein in the step (1), the median particle diameter of the spherical graphite is 5 to 14 mu m, the concentration of TiO2 in the TiO2 sol is 0.2 to 2.0 mol / L, and the spray granulation equipment has an air inlet temperature of 250 to 350 DEG C and an air outlet temperature of 70 to 100 DEG C. According to the invention, high-rate charge and discharge performance of graphite is improved, the phenomenon of precipitation of lithium from the surface of graphite in the process of heavy current charge and discharge is avoided, security of a material is enhanced, an obtained composite material has capacity substantially higher than the capacity of a pure TiO2 material, and the preparation method is simple to operate and applicable to industrial production.
Owner:SHANGHAI SHANSHAN TECH CO LTD

Micro-mesoporous polytriphenylamine derivative applied to lithium battery, as well as preparation method thereof

InactiveCN106207182AExcellent charge and discharge performanceHigh charge-discharge specific capacityCell electrodesSecondary cellsChemistryLithium electrode
The invention provides a micro-mesoporous polytriphenylamine derivative applied to a lithium battery, as well as a preparation method thereof, relates to a lithium ion battery material and a preparation method thereof, and discloses a micro-mesoporous structured polytriphenylamine derivative with high free radical density, an application thereof and a lithium battery prepared from the polytriphenylamine derivative. The micro-mesoporous structured polytriphenylamine derivative is prepared by taking 4,4',4'-tris(N,N-diphenylamino)triphenylamine as a monomer by virtue of a chemical oxidative polymerization method. Such a polytriphenylamine derivative material is of a micro-mesoporous structure and fiber morphology, is used as a lithium ion battery cathode material, and has high charge and discharge performance, cyclic stability and rate performance.
Owner:SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY

Manufacturing method for high-voltage lithium ion anode material

The invention provides a manufacturing method for a high-voltage lithium ion anode material. A lithium battery manufactured with the preparation method can be quickly recharged and discharged, and the recharging cut-off voltage is increased to 4.35V, so that the energy density of the lithium battery is greatly increased. The anode material manufactured with the manufacturing method takes lithium titanate as a core, the surface of lithium titanate is uniformly coated with a layer of graphite, and the surfaces of lithium titanate particles coated with the graphite are further coated with a layer of conductive agent, as a result, a lithium titanate-graphite-conductive agent three-layer composite structure is formed. The manufactured battery has very good performance of quick recharging and discharging and is greatly improved in high and low temperature performance and safety.
Owner:田东

Preparation method of lithium battery high-voltage modified cathode material

The invention provides a preparation method of a lithium battery high-voltage modified cathode material. A lithium battery made of the cathode material can be charged and discharged rapidly; the charging cut-off voltage is raised to 4.35V; and the energy density of the battery is greatly increased. In the cathode material prepared with the method, graphite is taken as a core, the surface of the graphite is uniformly coated with a layer of lithium titanate, and the surfaces of graphite particles coated with the lithium titanate are coated with a layer of conductive agent, thereby forming a graphite-lithium tianate-conductive agent three-layer composite structure. The obtained battery has high rapid charging-discharging performance, and the low-temperature performance is improved greatly. Meanwhile, the safety performance is improved greatly.
Owner:田东

Linear hierarchy lithium titanate material, as well as preparation and application thereof

The invention provides a linear hierarchy lithium titanate material, as well as preparation and application thereof. The lithium titanate material has a spinel crystal phase, or a monoclinic crystal phase or a composite crystal phase of spinel and monoclinic crystal phases, wherein the lithium titanate material is mainly formed by a linear hierarchy structure which has a draw ratio of more than 10; and the surface of the lithium titanate material with the linear hierarchy structure is formed by nanosheets. According to the linear hierarchy lithium titanate material, the long axis of the linearstructure is favorable to effective mobility of electrons, the flaky hierarchy structure is favorable to the process of quickly embedding in and out lithium ions, sodium ions or potassium ions, a large specific surface area is favorable to the contact area of electrolyte and electrode, the current density is reduced, and the material has relatively good battery quick charge and discharge performance.
Owner:PETROCHINA CO LTD

Linear porous lithium titanate material and preparation and product thereof

The invention provides a linear porous lithium titanate material and preparation and product thereof. The linear porous lithium titanate material is characterized in that the crystal phase is spinel lithium titanate; the lithium titanate material is of a linear structure; the length to diameter ratio of the linear structure is greater than 10; the linear lithium titanate material is of a porous structure; the structure of the linear porous lithium titanate material consists of a plurality of particles; each particle has the fixed growth direction. The linear porous lithium titanate material has the advantages that the long axis of the structure is suitable for the effective transfer of electrons; the porous structure is suitable for the quick embedding-in and embedding-out process of lithium ions, sodium ions or potassium ions; the large specific surface area is suitable for the contact area between an electrolyte and an electrode, so that the current density is reduced, and the betterbattery quick charge and discharge property is realized.
Owner:PETROCHINA CO LTD

High-volume specific capacity coal-based supercapacitor electrode material and preparation method thereof

The invention relates to the technical field of supercapacitor electrode materials, and provides a high-volume specific capacity coal-based supercapacitor electrode material and a preparation method thereof. The high-volume specific capacity coal-based supercapacitor electrode material is obtained in the following steps that coal is crushed to obtain coal powder, and the coal powder and an oxidizing agent are subjected to oxidation treatment to obtain coal oxide; the coal oxide is mixed with potassium hydroxide to obtain a mixture; the obtained mixture is compacted, and the compacted mixture is carbonized to obtain a carbonized sample; the carbonized sample is washed and dried to obtain the supercapacitor electrode material. According to the method, coal wide in source serves as the raw material, and a simple and universal compacting activation method is used for preparing the porous carbon material with high apparent density, high specific surface area and high volume specific capacity, the supercapacitor electrode material has excellent rapid charge and discharge performance, the problem that the volume ratio of a supercapacitor electrode material is not high is solved, and an idea for clean and efficient utilization of coal is provided.
Owner:XINJIANG UNIVERSITY

Active material for batteries, non-aqueous electrolyte battery, and battery pack

ActiveCN105102089AExcellent repeated charge and discharge characteristicsGood fast charge and discharge capabilityBatteries circuit arrangementsTantalum compoundsBattery packMetal
According to one embodiment, there is provided an active material. The active material contains a composite oxide represented by the following general: a general formula Lix(Nb1−yTay)2+0.5zTi1−zM0.5zO7 (0≰x≰5, 0≰y≰1, and 0<z≰1). In this formula, M is at least one metal element selected from the group consisting of Sc, Y, V, Cr, Fe, Co, Mn, Al, and Ga.
Owner:KK TOSHIBA

Graphite negative electrode material, preparation method thereof and battery

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a graphite negative electrode material which is of a pomegranate-like structure and comprises a graphene shell layer and a plurality of graphite monomer particles wrapped in the graphene shell layer, and each graphite monomer particle comprises a graphite particle and an amorphous carbon layer wrapping the outer surface of the graphite particle. According to the graphite negative electrode material, the graphite particles serve as the inner core, the outer surface of the inner core is coated with the amorphous carbon layer to form a graphite monomer particle, the multiple graphite monomer particles are coated with the graphene to form a whole, the whole is a secondary coated particle with the graphene as the shell layer, the whole is of a pomegranate-like structure, the ion transmission path is shortened, the rapid charging and discharging performance of the lithium ion battery is improved, and the cycling stability, the charging and discharging efficiency and the safety performance of the lithium ion battery are improved.
Owner:EVERGRANDE NEW ENERGY TECH SHENZHEN CO LTD

Lithium titanate of porous structure as well as preparation method and application thereof

ActiveCN109319829AAdjustable percentageCrystal phase adjustableAlkali titanatesCell electrodesLithium hydroxideAqueous solution
The invention provides lithium titanate of a porous structure as well as a preparation method and application thereof. The preparation method comprises the following steps of S1, dispersing a titaniumsource into a hydrogen peroxide water solution containing lithium hydroxide to obtain a dispersion solution; S2, performing heating reaction on the dispersion solution obtained in the S1 to obtain precursors; S3, separating and drying the precursors obtained in the S2; S4, performing low-temperature annealing treatment on the dried precursors; S5, performing high-temperature annealing treatment on the precursors subjected to low-temperature annealing treatment in S4 to obtain the lithium titanate of the porous structure. The lithium titanate of a linear porous structure, a linear and regularparticles existence porous structure and a regular particle porous structure can be prepared by the method, and these structures cannot be realized by other methods.
Owner:PETROCHINA CO LTD

Linear grading structure type lithium titanate and preparation method and application thereof

The invention provides linear grading structure type lithium titanate and a preparation method and application thereof. The preparation method comprises the following steps of (S1) dispersing a titanium source into an aqueous solution of hydrogen peroxide containing lithium hydroxide, so as to obtain a transparent solution; (S2) heating the transparent solution obtained in step (S1) to react, so as to obtain a linear structure type precursor; (S3) separating the linear structure type precursor obtained in step (S2), and drying; (S4) performing heat liquid reaction on the dried linear structuretype precursor in step (S3), so as to obtain the linear grading structure type lithium titanate. The obtained linear grading structure type lithium titanate is suitable for the effective transfer ofelectrons, is suitable for the quick embedding-in and embedding-out process of lithium ions, sodium ions or potassium ions by the grading structure, and is suitable for increasing the contact area between an electrolyte and an electrode by the large specific surface area, and reducing the current density; the better quick charge and discharge property of a battery is realized.
Owner:PETROCHINA CO LTD

Active material for batteries, non-aqueous electrolyte battery, and battery pack

According to one embodiment, an active material for batteries is provided. The active material for batteries comprises a composite oxide represented by the general formula: Lix(Nb1-yTay)2-zTi1+0.5zM0.5zO7. In the formula, 0<=x<=5, 0<=y<=1, 0<z<=1, and M represents at least one metal element selected from the group consisting of Mo and W.
Owner:KK TOSHIBA

Graphene composite copper sulfide/nickel sulfide catalytic material and preparation method and application thereof

The invention provides a graphene composite copper sulfide / nickel sulfide catalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing a graphene oxide dispersion liquid; dissolving copper nitrate, nickel nitrate and urea in deionized water, uniformly performing stirring, adding the graphene dispersion liquid, and uniformly performing mixing to form a mixed solution; placing the mixed solution in a polytetrafluoroethylene reaction kettle, performing hydrothermal reaction, performing cooling to room temperature, performing centrifugal washing with deionized water and ethanol, and performing drying to obtain precursor powder; respectively placing the precursor powder and sulfur powder in two porcelain boats, and performing calcining in an argon atmosphere to obtain the graphene composite copper sulfide / nickel sulfide catalytic material. According to the graphene composite copper sulfide / nickel sulfide catalytic material prepared by the invention, the synergistic effect between strong interface coupling and sulfur vacancies can effectively adjust an electronic structure, the adsorption behavior of an oxygen intermediate is promoted, and the graphene composite copper sulfide / nickel sulfide catalytic material shows excellent and efficient oxygen reduction and alcohol oxidation dual-function catalytic performance.
Owner:WUHAN UNIV OF TECH

Technology for processing anode material of cell

The invention which belongs to the technical field of the chemical industry concretely relates to a technology for processing an anode material of a cell. The technology for processing the anode material of the cell has the advantages of simple operation and convenience for the enlarged production. The invention adopts the following technical scheme: a template-high temperature solid phase technique is utilized to process the anode material of the cell in the invention, and the technology of the invention comprises steps of burdening, material mixing, drying, burning, ball milling, sieving, homogenizing and packaging.
Owner:舒品

Negative electrode material for power lithium-ion battery with core-shell structure and preparation method thereof

The invention relates to a power lithium-ion battery negative electrode material with a core-shell structure of an electric automobile and a preparation method thereof. The power lithium-ion battery negative electrode material comprises a graphite core and a shell, wherein the shell has a single-layer structure or a double-layer structure and is formed by one cladding or two cladding through a solid-phase cladding method; the shell with the single-layer structure is a hard-carbon and soft-carbon mixed carbide layer; the shell with the double-layer structure consists of an inner layer and an outer layer, the inner layer is a hard-carbon and soft-carbon mixed carbide layer, and the outer layer is a pure soft carbon carbide layer. The shell is prepared by the following steps: uniformly mixing and cladding the crushed hard-carbon and soft-carbon mixed coatings and isotropic graphite in a conical mixer, performing carbonization in an inert atmosphere, cooling, crushing and screening to obtain the shell formed by one cladding or a shell formed by two cladding. The compatibility of the graphite negative electrode material on an electrolyte solution is enhanced, and the problems that a lithium ion battery is poor in rate charge and discharge performance in high / low-temperature environments and a graphite structure is easily damaged in a charge and discharge process are solved.
Owner:XINXIANG SAIRI NEW ENERGY SCI & TECH

A three-dimensional current collector, metal lithium negative electrode and primary/secondary battery for primary/secondary battery lithium metal negative electrode

The invention provides a three-dimensional current collector for metal lithium negative poles of primary / secondary batteries, which is composed of carbon nanotubes or a nano network with a porous structure formed by clustering and weaving of carbon nanotubes. The three-dimensional current collector used in the primary / secondary battery lithium metal negative electrode provided by the present invention refers to a three-dimensional porous structure woven into carbon nanotubes or carbon nanotube bundles, and the porous structure is used to accommodate metal lithium, which may be able to inhibit the secondary use of metal lithium. Growth of lithium dendrites in batteries, three-dimensional carbon nanotube network materials for high-capacity discharge at high current densities. The primary / secondary battery metal lithium negative electrode prepared by using the three-dimensional current collector provided by the invention has extremely high long-term cycle stability and can be charged and discharged multiple times with a very high specific capacity; at the same time, the composite negative electrode shows good fast charge and discharge capability.
Owner:UNIV OF SCI & TECH OF CHINA
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