238results about How to "Increase discharge voltage" patented technology

Briefly described, the invention provides a photovoltaic assembly power output utilizing device which partially charges a capacitor assembly. This capacitor assembly is then partially discharged by a DC / DC power converter in different ranges of voltages in which the power output from the photovoltaic assembly peaks for different light intensities.

An alkali metal, solid cathode, nonaqueous electrochemical cell capable of delivering high current pulses, rapidly recovering its open circuit voltage and having high current capacity, is described. The stated benefits are realized by the addition of at least one nitrate additive to an electrolyte comprising an alkali metal salt dissolved in a mixture of a low viscosity solvent and a high permittivity solvent. A preferred solvent mixture includes propylene carbonate, dimethoxyethane and an alkali metal nitrate, alkaline earth metal nitrate and / or an organic alkyl nitrate additive.

This invention relates to a full solid film Li cell and its manufacturing method, in which, said cell is composed of one positive film selecting from LiCoO2, V2O5 or LiMn2O4, a solid LiPON electrolyte film between the positive and the negative films, a collector film and a package material film as the sealing. The interface of the electrolyte of full solid film Li cells and the electrode is stable, not crystallized and the mechanical performance is strong and having the storing and working temperature from -55 to 300deg.C capable of enduring high temperature and high pressure while keeping high capacity and circulation performance. Besides, the cell can be processes to a flexible film cell with the thickness of 5-8mum, 8-15mum or over.

A particulate positive electrode active material for a lithium secondary cell which satisfies high charge and discharge cyclic durability, high safety, high temperature storage properties, a high discharge average voltage, large current discharge properties, a high weight capacity density, a high volume capacity density, etc. in a well-balanced manner is provided. A particulate positive electrode active material for a lithium secondary cell, which is represented by the formula LipCoxMyOzFa (wherein M is at least one element selected from Groups 2 to 8, 13 and 14 of the Periodic Table, 0.9≦p≦1.1, 0.980≦x≦0.9999, 0.0001≦y≦0.02, 1.9≦z≦2.1, 0.9≦x+y≦1 and 0.0001≦a≦0.02), wherein fluorine atoms and element M are unevenly distributed on the particle surface, the atomic ratio of fluorine atoms to cobalt atoms (a / x) is from 0.0001 to 0.02, and in powder X-ray diffraction using CuKα-ray, the half value width of the angle of diffraction on (110) plane is from 0.06 to 0.13°, and the half value width of the angle of diffraction on (003) plane is from 0.05 to 0.12°.

The present invention relates to positive electrode active substance particles comprising a compound having a spinel type structure comprising at least Li, Ni and Mn, and having an Li content which is controlled such that a molar ratio of Li(Ni+Mn) therein is 0.3 to 0.65, an Ni content of 5 to 25% by weight, an Na content of 0.05 to 1.9% by weight and an S content of 0.0005 to 0.16% by weight, a sum of the Na content and the S content being 0.09 to 1.9005% by weight. The positive electrode active substance particles according to the present invention can be suitably used as positive electrode active substance particles for non-aqueous electrolyte secondary batteries which can exhibit a high discharge voltage and an excellent discharge capacity.

The invention disclosed is a composition of a single-phase solid solution of LiMnO2 and LiMO3 having a Li2MnO3-type crystallographic structure and the general formula Lii+y / 3Mn2y / 3M(1−y)O2, wherein 0<y<1, manganese is in the 4+ oxidation state, M is one or more transition metal or other cations which have an appropriate ionic radii to be inserted into the structure without unduly disrupting it, but not solely Ni or Cr, e.g. one or more the first row transition metals: Ti, V, Cr, Mn, Fe, Co, Ni or Cu, or other specific other cations: Al, Mg, Mo, W, Ta, Si, Sn, Zr, Be, Ca, Ga, and P, and M has an average oxidation state of +3. Also disclosed are compositions and structures of the materials e.g in the form of a positive electrode for a non-aqueous lithium cell or battery.

The present invention relates to method for synthesizing positive electrode material vanadium lithium phosphate of lithium ion cell by using sol-gel process. Said method includes the following steps: adopting sol-gel reaction, using vanadium pentoxide or vanadium trioxide, ammonium dihydrogen phosphate, lithium carbonate and citric acid as raw material to synthesize precursor body of lithium ion cell positive electrode material Li3V2(PO4)3, then under the protection of inert gas roasting said precursor body to make V5+ be completely reduced into V3+ and simultaneously produce product Li3V2(PO4)3.

Disclosed herein is a battery module including a plurality of unit cells stacked one on another. The battery module has a cooling system that accomplishes contact type cooling by a coolant flowing through gaps (flow channels) defined between the unit cells, and the flow channels defined between the unit cells are at a predetermined angle to the flowing direction of the coolant at inlet ports of the flow channels. The contact rate of the coolant to the unit cells in the battery module is increased and a large number of turbulent flows are created by the changing the flow channel through which the coolant flows. Consequently, the occurrence of the velocity gradient of the coolant in the flow channel defined between the unit cells is prevented, and therefore, the cooling efficiency of the battery module is improved. Furthermore, a battery pack including the battery module has high cooling efficiency although the overall structure of the battery pack is not greatly changed, or a large-sized cooling fan or a string driving unit is not used. Consequently, the battery pack is preferably used as a power source for electric vehicles or hybrid electric vehicles.

It is to provide a cathode active material for a lithium ion secondary battery, which has high safety, a high discharge voltage, a large capacity and excellent cyclic durability, and a process for producing it. A cathode active material for a lithium secondary battery, characterized by comprising a particulate lithium cobalt composite oxide represented by the formula LiaCobAlcMgdAeOfFg  (1) (wherein A is Ti, Nb or Ta, O.90≦a≦1.10, 0.97≦b≦1.00, 0.000l≦c≦0.02, 0.000l≦d≦0.02, 0.000l≦e≦0.01, 1.98≦f≦2.02, 0≦g≦0.02, and 0.0003≦c+d+e≦0.03).

The invention provides an electrode material comprising at least one kind of particles from silicon particles, tin particles, silicon compound particles, and stannic compound articles, and carbon fibre. The particles comprises: (1) at least one kind of particles from silicon particles, tin particles, silicon compound particles containing lithium ions which can be inserted and discharged, and tin compound particles containing lithium ions which can be inserted and discharged; or (2) carbon particles containing silicon and / or silicone compound deposited on partial surface of the carbon particles in plumbago structure. Lithium secondary battery adopting the electrode material as a cathode has the advantages of high loading capacity, cycle performance and excellent characteristics under high current load.

The invention discloses a method for manufacturing anode materials for sodium ion batteries and application of the anode materials. Different types of metal are doped in each anode material. The anode materials can be expressed as Na<2 / 3>A<1-x>B<x>O<2>. The A represents selected transition metal with electrochemical activity, the B represents the doped metal, and the content x of the B is higher than 0 and is lower than or equal to 0.20. The method includes mixing materials at earlier stages; drying the materials and carrying out heat treatment on the materials; compressing the materials to obtain sheets; calcining the sheets at high temperatures to obtain the metal-doped anode materials for the sodium ion batteries. The method and the application have the advantages that the anode materials for the sodium ion batteries have high discharge voltages and are high in circulation capacity and excellent in stable circulation, accordingly, the specific capacity and the energy density of the batteries can be greatly improved when the anode materials are used as anodes of the sodium ion batteries, and the anode materials have excellent application prospects.

The invention belongs to the technical field of a cathode material for a lithium primary battery, particularly relates to the field of preparation of the cathode material for a fluorocarbon battery, and in particular to a composite carbon fluoride cathode material for the lithium primary battery, a preparation method and an application thereof. The material is a composite material prepared by ballmilling and mixing a porous carbon fluoride material having a high tap density and a carbon fluoride material having a high graphitization degree and then fluorinating the mixture. The composite material has a carbon content of 38-60%, a fluorine content of 40-62% and a tap density of greater than 0.8g / ml; the mixing mass ratio is in the range of 1:0.1-1:10; and the composite material has high specific surface area, high tap density and high graphitization degree. Due to the high tap density of the material, the overall high volumetric specific energy of the material is guaranteed; through anion diffusion channel composed of porous carbon fluorides, the voltage hysteresis phenomenon at the initial stage of the battery discharge is effectively improved and the overall discharge performance of the material is improved.

The invention discloses an efficient multi-field-coordination fine particulate matter removal device and an efficient multi-field-coordination fine particulate matter removal method. The device comprises an outer field coagulation area, a direct current dust pre-collecting area, a pulse charge coagulation area and a direct current dust collecting area which are connected in sequence, wherein water steam and a chemical agglomeration agent are introduced from a nozzle of the outer field coagulation area respectively; the direct current dust pre-collecting area and the direct current dust collecting area are arranged in a line-plate type symmetric structure, a line electrode applies negative direct current high voltage, and a plate electrode is grounded and adopts layout of a water film electrode; the pulse charge coagulation area is arranged in the line-plate type symmetric structure, the line electrode applies positive pulse high voltage, and the plate electrode is grounded and adopts layout of the water film electrode. The device and the method aim at mineral particulate matters discharged by a fixed source; aerosol particulate matters, particularly fine particulate matters, can be subjected to efficient coagulation removal in a structural form of double coagulation areas and double dust collecting areas by using a multi-field-coordination method combined by a phase-change coagulation growth technology, a chemical agglomeration and flocculation mechanism and an electric coagulation technology, so that the phenomena of back corona, re-entrainment of dust, ash deposition and corrosion of the plate electrode are effectively avoided.

The invention provides a positive electrode containing nitrogen-doping graphene for a lithium / thionyl chloride battery, a preparation method of the positive electrode and a lithium / thionyl chloride battery adopting the positive electrode. Nitrogen-doping graphene is added into a positive electrode of the lithium / thionyl chloride battery to be used as a catalyst, so that the lithium / thionyl chloride battery prepared by adopting the positive electrode is more excellent in electromechanical performance, the discharge voltage and discharge capacity of the lithium / thionyl chloride battery are remarkably increased, a discharge test system is discharged to 2.0V at a current density condition of 25mA / cm<2> at the normal temperature, the discharge specific capacity reaches up to 1700mAh / g or more, the discharge voltage is 2.83V, the discharge specific capacity is approximately 600mAh / g higher than that of the lithium / thionyl chloride battery with no catalyst in the positive electrode, and the discharge voltage is 100mV higher than that of the lithium / thionyl chloride battery with no catalyst in the positive electrode.

The invention provides positive electrode material Fe<x>Co<1-x>S<2> powder of a thermal battery and preparation method for the powder. In the Fe<x>Co<1-x>S<2> powder, x is greater than 0 and less than 1. The positive electrode material Fe<x>Co<1-x>S<2> powder of the thermal battery is prepared by combination of advantages of two kinds of positive electrode materials of CoS<2> and FeS<2> by a method in combination of chemical deposition and high-temperature solid-phase reaction. The positive electrode material Fe<x>Co<1-x>S<2> powder of the thermal battery has the advantages of high capacity and high voltage platform of the FeS<2>, as well as the advantages of low electrical resistivity and thermal stability of CoS<2>, and is a novel positive electrode material of the thermal battery.

The invention discloses a lithium / air battery which belongs to the chemical power source field and is designed for solving the technical problem anode metallic lithium corrosion, high possibility of power failure and bad cycle performance of the existing lithium air battery. A shell is divided into an anode room, a buffer room and a cathode room by a solid inorganic electrolyte membrane and a diaphragm. The lithium / air battery uses a hydrophobic ionic liquid as an anode electrolyte, which has the advantages of non-volatile, high conductivity, wide electrochemical window, low melting point and moderate viscosity, and can prevent the metallic lithium from being corroded by water and oxygen. The cathode uses a water base-weak acid-buffer solution with the Ph of not less than 4 and not more than 5 as the electrolyte; compared with a neutral or alkaline electrolyte, the water base-weak acid-buffer solution ensures that the average discharge voltage (0.1-0.2V) can be improved, a discharge plateau can be prolonged, and the corrosion of the strongly alkaline electrolyte to the solid inorganic electrolyte membrane is reduced; and a cathode discharge product is a water-soluble LiOH which cannot deposit on the surface or in the duct of the cathode to cause power failure, and is good in cycle performance.

The invention discloses a preparation method of a titanium and titanium alloy surface black protective film for surgical implantation, comprising the following steps: step 1: carrying out micro-arc oxidation coloring processing on titanium and titanium alloy surface to be processed, in the process, firstly, preparing a micro-arc oxidation electrolysing solution, and then carrying out the micro-arcoxidation coloring processing; and step 2: carrying out subsequent processing on the micro-arc oxidation film, wherein the subsequent processing comprises the following steps: firstly, preparing a mixed solution for hydro-thermal processing, completely dipping the titanium and titanium alloy after micro-arc oxidation shading processing in the mixed solution, carrying out the hydro-thermal processing on the surface by adopting a hydro-thermal method, drying the titanium and titanium alloy under the condition of low temperature when the hydro-thermal processing is completed, and generating a layer of pure black micro-arc oxidation film with uniform and plump surface on the titanium and titanium alloy surface. The invention has simple and convenient operation, economy, high production efficiency, and high bonding strength between a generated ceramic film, i.e. the micro-arc oxidation film and a substrate, and the invention can effectively overcome various defects and deficiencies which exist in the prior coating processing techniques.

The invention relates a preparation method of a sulfur-containing composite anode for a lithium-sulfur battery, and a lithium-sulfur battery using the composite anode. According to the invention, a carbon fluoride additive with electrochemical activity is added in a process of sulfur-containing anode processing to prepare a composite sulfur-containing anode, so that the electrochemical activity of the sulfur-containing anode with a high sulfur content is improved, and the first electro-discharge specific energy of the lithium-sulfur battery is improved. The mass ratio of the active additive of the carbon fluoride to whole active substances is 20%-50%. The invention provides the preparation method of the sulfur-containing composite anode; on one side, since the electro-discharge product of the active additive of the carbon fluoride, the conductivity can be improved in the following electro-discharge process of a sulfur material, so that the sulfur-containing anode with a high sulfur content discharges normally; on the other side, carbon fluoride has electrochemical activity, the electro-discharge capacity isn't affected; the electro-discharge voltage of the anode is improved; and the first electro-discharge specific energy of a lithium-sulfur battery, especially a lithium-sulfur primary battery, is increased.

The invention relates to an acid single flow cell which can be applied to large-scaled energy storage and power generation. The cell comprises an electrolyte storage tank, a cadmium or indium deposited cathode current collector and a lead dioxide anode; an acid solution of soluble cadmium salt or indium salt is used as an electrolyte; and when the cell is charged, the cadmium or indium ions are deposited on the cathode current collector from the electrolyte, and when the cell is discharged, the metal cadmium or indium is dissolved in the electrolyte from the cathode current collector. The current cell has the advantages of simple structure, convenient preparation, high electric energy conversion efficiency, long cycle life, environmental protection, safe use, and the like.

The invention provides an electrostatic air conditioner cleaner for a central air-conditioning system and an electric discharge device arranged in the electrostatic air conditioner cleaner. The electrostatic air conditioner cleaner comprises a shell, an air inlet, an air outlet, an electric discharge assembly and an ionization dust collecting assembly, wherein the electric discharge assembly comprises an electric discharge anode assembly which is of an acicular structure and an electric discharge cathode assembly, the acicular structure is firm, can be used for improving an electric discharge voltage, can be washed without any chemical agent or a soaking process and can be directly flushed with a pressure water pistol, the electric discharge anode assembly passes through the center of the ionization dust collecting assembly and extends out of the tail end of the ionization dust collecting assembly, and the ionization dust collecting assembly consists of honeycomb six-wall type ionization dust connecting plates, thus the dust collecting space is increased and the overall size of the cleaner is reduced; and the overall performance of the cleaner is improved, and the cleaning period is prolonged. Compared with a medium-efficiency band filter, the cleaner has the advantages that the production of nondegradable solid pollutants can be reduced and the effects of environmental friendliness, energy conservation and emission reduction are achieved truly.

The invention belongs to the technical field of electrochemistry and particularly relates to a high-voltage magnesium charge-discharge battery. The high-voltage magnesium charge-discharge battery consists of a membrane, a cathode, an anode and an electrolyte, wherein the membrane is solid and lithium ions can pass through the membrane reversibly; the cathode is magnesium metal or magnesium alloy, the electrolyte which is in the side of the cathode is a common organic electrolyte, a polymer electrolyte, an ionic liquid electrolyte or a mixture thereof, the anode is a common anode material for a lithium ion battery, and the electrolyte which is in the side of the anode is an aqueous solution containing lithium salt or a hydrogel electrolyte. The magnesium charge-discharge battery can be used for solving the matching problem between the electrolyte and anode material of the existing magnesium charge-discharge battery and other problems, and has the advantages of high voltage and high energy density by compared with the traditional magnesium charge-discharge battery. The magnesium charge-discharge battery with high energy density can be used for storing and releasing electric power.

Disclosed herein is a middle- or large-sized battery pack case in which a battery module having a plurality of stacked battery cells, which can be charged and discharged, is mounted, wherein the battery pack case is provided with a coolant inlet port and a coolant outlet port, which are disposed such that a coolant for cooling the battery cells can flow from one side to the other side of the battery module in the direction perpendicular to the stacking direction of the battery cells, and the battery pack case is further provided with beads formed in a concavo-convex shape for improving the structural stability of the battery pack case against an external force, the beads being constructed in an outwardly-protruding structure to allow the coolant to be uniformly introduced into the battery module from the coolant inlet port in the advancing direction of a fluid in a flow space (“inlet duct”) defined between the coolant inlet port and the battery module.

The invention discloses a preparation method of a flexible-package high-power lithium ion power battery; the battery comprises a cathode piece, a diaphragm, an anode piece, an electrolyte, a tab, and an aluminum plastic film. The tab is a bidirectional tab; a cathode current collector is charcoal-coated aluminium foil. The beneficial effects of the invention are that with the bidirectional tab, during high-rate discharge of the battery, the current passing distance is shortened; the polarization is reduced; the heating amount is decreased; the battery rate cycle performance is prolonged; with the charcoal-coated aluminium foil used as the cathode current collector, the contact internal resistance between the cathode active substance and the collector is effectively reduced; the expansion degree of the active substance during high-rate cycle of the battery is reduced; and the high-rate discharge voltage and the rate cycle performance of the battery are effectively improved.

A battery capable of improving the constant output discharge capacity is provided. A battery includes a cathode, an anode, and an electrolyte. The cathode contains iron sulfide. The anode contains lithium metal or a lithium alloy. A ratio of a discharge capacity per unit area of the cathode to a discharge capacity per unit area of the anode (the discharge capacity per unit area of the cathode / the discharge capacity per unit area of the anode) is more than 1 and 1.4 or less.

The invention relates to a preparaiton method for vanadic lithium fluoride phosphate as anode material of lithium cell. Wherein, with low-temperature solid phase reaction, mixing the hydrogen peroxides solution and vanadic oxide to obtain hydrogel; using the ydrogel, ammonium monoacid phosphate, lithium fluoride and acetylene black to compose the predecessor of LiVPO4F; baking the predecessor at inertia gas to reduce V5+ into V3+ completely and obtain the LiVPO4F. This invention simplifies operation, reduces reaction temperature and time and cost. The product has well performance and application future.

The invention discloses an electrolyte for a lithium battery. The electrolyte contains a pyridine ionic liquid, and the pyridine ionic liquid contains cations and anions; the cations are N-alkylpyridine; and the anions are one kind of the anions of a group consisting of halite ions, tetrafluoroboric acid anions, hexafluorophosphoric acid anions, bis(trifluoromethanesulphonyl)imine anions, lactic acid anions, p-methyl benzene sulfonate acid radical anions, acetyl sulfonyl imide anions, saccharin anions, amino acids anions, sulfuric acid ester anions, succinic acid diisooctyl ester sulfonate radical anions, 4,5-dimetridazloe anions, and 5-nitrotetrazolato anions. The electrolyte can change the reaction mechanism of the battery, improve the reduction rate of a cathode active material and the mass transfer rate of the electrolyte, and increase the electrical conductivity of the electrolyte, so the discharge voltage of the lithium battery is improved. Furthermore, the invention further discloses a preparation method for the electrolyte and the lithium battery containing the electrolyte.

Disclosed herein is a battery cartridge for middle- or large-sized battery packs, which has one or more unit cells mounted therein. The battery cartridge is generally constructed in a plate-shaped structure for easy stacking, and connecting members for electrical connection between cartridges are constructed in a coupling structure in which the connecting members are coupled with each other during the stacking of the cartridges. When a plurality of cartridges are stacked one on another so as to construct a middle- or large-sized battery pack, the mechanical coupling between the cartridges is accomplished, and, at the same time, the electrical connection between the cartridges is also accomplished, whereby the assembly of the cartridges is easily accomplished, and the risk of short circuits is prevented during the assembly or the use of the cartridges. Furthermore, a middle- or large-sized battery pack manufactured using the battery cartridge according to the present invention has a stable compact structure. Consequently, the middle- or large-sized battery pack is preferably used as a power source for electric vehicles or hybrid electric vehicles.