164results about How to "Improve high-current discharge performance" patented technology

The invention discloses a lithium ion battery silicon carbon composite anode material and a preparation method thereof. The material is prepared by twice spray drying and once sintering. The preparation method comprises the following steps of: 1) dissolving an organic carbon source in an appropriate amount of solvent, adding a silicon source and a dispersing agent for dispersing suspension uniformly, adding graphitized carbon for dispersing the suspension for a certain period of time, and performing primary spray drying on the uniformly dispersed suspension to obtain a spherical nucleus material; and 2) dissolving the organic carbon source in the appropriate amount of the solvent, adding the prepared spherical nucleus material, dispersing the suspension uniformly, performing secondary spray drying on the uniformly dispersed suspension to obtain powder, transferring the powder into a protective atmosphere for sintering, and performing furnace cooling on the powder to obtain the lithium ion battery composite anode material. The preparation method is simple and practicable and has high practicality; and the prepared silicon carbon composite material has the advantages of large reversible capacity, designable capacity, high cycle performance, high rate capability, high tap density and the like.

The invention discloses a preparation method for a composite cathode material of a lithium ion battery by means of spray drying pyrolysis treatment. The preparation method includes the steps: dissolving a first type of binder organic carbon source into solvent of a proper quantity, adding a silicon source, a second type of binder and a dispersing agent, dispersing uniformly, adding graphite, dispersing for a certain time, subjecting uniformly dispersed suspension to spray drying, and using the first type of binder organic carbon source to bond the silicon source, the graphite and the second type of binder particles into spherical or spherical-like forms to obtain a composite precursor; and transferring the precursor into a shielding atmosphere for sintering, heating the second type of binder to a certain temperature to be melted into a liquid crystal state, bonding the particle silicon source and the graphite into cores, subjecting the organic carbon source to pyrolysis at the high temperature to form a coating, and furnace cooling to obtain the carbon-silicon composite cathode material of the lithium ion battery. The preparation method is simple, easy in implementation and high in practicality. The carbon-silicon composite prepared by the method has the advantages of high reversible capacity, designable capacity, high circulating performance and high-current discharging performance, high tap density and the like.

The dynamic battery includes shell, positive pole piece, negative pole piece, diaphragm, and electrolyte. Positive pole piece / negative pole piece are composed of afflux bodies of positive / negative poles in same size, and active materials painted on the afflux bodies respectively. Ion doped lithium iron phosphate is adopted as positive pole material, and canting pulled aluminum mesh is as afflux body of positive pole. Carbon black, graphite, and Nano Al2O3 are selected for conduction agent. Crylic acid - styrene polymer, and crylic acid - silica polymer are chosen for bonding agent of positive pole material. The invention simplifies technical procedure, paints pole pieces easily, and increases following performances greatly: conductivity, ionic diffusion capability, discharging large current, as well as apparent density and packed density.

The invention relates to an eight ampere-hour column battery with an iron phosphate lithium aluminum shell and the processing technology, belonging to lithium iron power battery field. The invention has an external diameter of 35.0mm plus or minus 0.1mm and a height of 110.0mm plus or minus 0.5mm, omprising a casing, an anode flake, a cathode flake, an electrolyte and a diaphragm; wherein, the anode flake and the cathode flake respectively comprise an anode current collector and a cathode current collector, as well as an anode sizing agent and a cathode sizing agent coated on the anode current collector and the cathode current collector. The casing is an aluminum shell; the anode material uses the iron phosphate lithium; the anode current collector uses aluminum foil; the conductive agent uses one of or the mixture of the superconducting carbon black and the conductive graphite; and the anode material binder uses the polyvinylidene fluorine; the cathode material uses the natural graphite or the artificial graphite; the cathode current collector uses copper foil; the conductive agent uses one of or the mixture of the superconducting carbon black and the conductive graphite; and the cathode material binder uses the polyvinylidene fluorine or the sodium carboxymethylcellulose and the styrene butadiene rubber; the anode flake, the cathode flake and the diaphragm are winded into a cylindrical volume core through the multilayer stack-up. The invention has the advantages of large capacity and high discharge rate.

The invention discloses a negative plate of a battery, a preparation method thereof and the battery comprising the negative plate. The negative plate is composed of a plate grid and a negative pole material coated on the plate grid, and the negative pole material comprises a battery active material, a capacitor material as well as a conductive steric hindrance agent; the battery active material comprises 100 parts by weight of lead powder, 0.6-2.0 parts by weight of barium sulfate and 0.1-0.5 part by weight of short fiber, and the capacitor material comprises 0.1-10 parts by weight of active carbon; and the additive amount of the electric conduction steric hindrance agent is 0.1-5.0 in parts by weight, and the conductive steric hindrance agent comprises Magneli mutual sulfoxide titanium oxide and/or plumbous acid barium. The raw material of the negative plate of the battery provided by the invention can be used for postponing a negative board sulphate phenomenon through combining the three parts, the cold-starting property is markedly improved, and the heavy-current charge-discharge property is optimized.

The invention provides a carbon composite material. The carbon composite material comprises a core part and a shell part, wherein the core part comprises graphite; the shell part comprises amorphous carbon; the average grain diameter is 8 to 20 mu m; and the interlamellar spacing specific surface area is 0.3 to 2.5 m<2>/g. The invention also provides a preparation method of the carbon composite material. The preparation method comprises the following steps of: a, adding the graphite into aqueous solution of a carbon-coated precursor and mixing pulp uniformly; b, performing hydro-thermal treatment on the pulp obtained in the step a and the drying; and c, performing heat treatment on a product obtained in the step b under an inert atmosphere or a vacuum condition, wherein the heat treatmentcomprises carbonizing treatment and graphitizing treatment. In the carbon composite material prepared by the method, the appearance is more perfect; a coating layer is coated more uniformly; the grain diameter is controlled more easily; and the big current property is higher. The invention further provides application of the carbon composite material to a lithium battery as a cathode.

The invention relates to an improved lithium- ferrous disulfide battery which comprises a shell; a positive pole piece and a negative pole piece in the shell are wound together through a porous isolating film, and organic electrolyte is filled in the shell. The positive pole piece comprises a positive active material and a positive current collector, and the positive active material is ferrous disulfide. The negative pole piece comprises a negative active material and a negative current collector, wherein the negative active material is metal lithium foil, and the negative current collector is selected form a copper net, a hole-shaped aluminum foil, an aluminum net, a hole-shaped copper foil, foamed nickel, a hole-shaped nickel foil or nickel net. The positive pole piece is manufactured by the positive active material, conductive agent and binding agent which are evenly mixed and applied to a metallic matrix; and the negative pole piece is manufactured by pressing the metal lithium foil and the metal net or the hole-shaped foil. Then the organic electrolyte is infused, and the battery is obtained after the packaging. The invention has the advantages of small internal resistance, good large current discharge performance, good pulse discharge performance, high discharge platform, no voltage sag and good consistence of performance.

The invention discloses rare-earth lead alloy for a lead-acid storage battery positive grid. The rare-earth lead alloy is characterized by being prepared by smelting the following component materials by weight percent: 0.01 to 0.12 percent of calcium, 1.2 to 2.0 percent of tin, 0.02 to 0.05 percent of aluminum, 0.01 to 0.12 percent of lanthanum, 0.01 to 0.12 percent of yttrium, 0.02 to 0.15 percent of cerium and the balance being lead. The rare-earth lead alloy is stable in chemical property, good in mobility, excellent in conductivity and strong in corrosion resistance; a lead-acid storage battery which is assembled by the grid is long in cycling life, strong in current discharging capacity and strong in charging acceptance capacity.

The invention discloses a manufacturing method of a lithium iron phosphate-cobalt acid lithium composite anode plate of a lithium ion battery, which comprises the following steps: A, ball-milling and uniformly mixing a nanometer cobalt acid lithium anode active material with a nanometer Super-C conductive agent in proportion to obtain a cobalt acid lithium active material mixture; uniformly mixing the mixture with polyvinylidene fluoride; mixing the mixture with sodium carboxymethylcellulose to obtain anode active material slurry; B, preparing the anode active material slurry: ball-milling and uniformly mixing nanometer lithium iron phosphate with the nanometer Super-C conductive agent in proportion to obtain a lithium iron phosphate active material mixture; mixing the mixture with the sodium carboxymethylcellulose in proportion; adding distilled water into the mixture, ball-milling and mixing uniformly to obtain anode active material slurry B; and C, coating the slurry A on a single surface of an anode current collector, and coating the slurry B on double surfaces of an initial pole piece according to coating process, thus obtaining an anode pole piece. A nickel-metal hydride battery prepared by the invention has high volume, high multiplying power, a good discharging effect, and long circulating service life.

The invention relates to a method for manufacturing a novel lithium iron battery. The novel lithium iron lithium ion battery is manufactured by combining an anode active substance made of a FeF3/V2O5 composite material and LiMn2O4 with a carbon cathode, wherein the anode active substance is prepared by ballmilling 5 to 85 mass percent of LiMn2O4 and 95 to 15 mass percent of FeF3/V2O5 composite material for 1 and 8 hours; before the anode active substance is prepared, the FeF3/V2O5 composite material is prepared first, namely V2O5 accounting for 1 to 50 percent of the total mass of the composite material and FeF3 accounting for 99 to 50 percent of the total mass of the composite material are subjected to high-energy ball mill for 1 to 8 hours and the ground V2O5 and FeF3 are annealed at the temperature of between 100 and 600 DEG C for 1 to 12 hours to form the FeF3/V2O5 composite material. The method has the advantages of improving the conductivity of the material, prolonging the service life of the battery, improving a discharging platform substantially and enhancing the large-current discharging capacity of the battery, along with high safety performance of the battery.

A lithium primary battery including a positive electrode, a negative electrode, an organic electrolyte, and a separator interposed between the positive electrode and the negative electrode: the negative electrode including a negative electrode active material; the negative electrode active material being at least one selected from the group consisting of lithium metal and a lithium alloy; at least a surface layer portion of the negative electrode including a composite of amorphous carbon material and the negative electrode active material; and the surface layer portion facing the positive electrode with the separator interposed therebetween.

The invention discloses a samarium-containing praseodymium and neodymium-free hydrogen storage alloy for a nickel-hydrogen power battery. The hydrogen storage alloy is characterized in that the atomic ratio of the composition is La(1-x-y)CexSmyNiaCobMncAldMe, wherein M is one or two of Fe, Cu and B; and x is 0.20-0.70, y is 0.01-0.30, a is 3.30-4.20, b is 0.10-0.70, c is 0.40-0.65, d is 0.10-0.35 and e is 0.05-0.30. The samarium-containing praseodymium and neodymium-free hydrogen storage alloy for a nickel-hydrogen power battery disclosed by the invention does not contain relatively expensive rare earth elements such as praseodymium, neodymium and the like and thus reduces the production cost, and also has the performance such as easy activation, high discharge voltage and capacity, good high-current discharge and the like.

The invention discloses a method for preparing a cathode electrode material of a nanobelt-type lithium ion battery, belonging to the technical field of energy. The method comprises the following steps: preparing a MoO3 nanobelt by using a hydrothermal method, evenly blending the MoO3 nanobelt and MgCl2 solution and stirring; then performing hydrothermal treatment once again; and utilizing Mg to dope the MoO3 nanobelt. By using the method, the specific area of MoO3 is greatly improved, the transmission speeds of electrons and ions are increased, and the embedding and abjection of lithium ions are promoted, thus improving the large-current discharging performance of the material of the battery; after Mg is doped, due to the polarization of Mg, the crystal face of MoO3 is contracted, therebyinhibiting the expansion of the material during charging and discharging; meanwhile, due to the doping of Mg, Li-O keys are weaken, the interface resistance is reduced, the mobility of the lithium ions is improved and the reversible capacity and cycling performance of the material are improved; and in addition, the preparation method provided by the invention has the characteristic of simple flow, small energy consumption and the like, and is beneficial to large-scale preparation and production.

The invention relates to a method for preparing an iron disulfide/carbon composite positive electrode material for a disposable lithium battery. According to the method, carbon covers the surfaces of iron disulfide particles, the mass percentage of iron disulfide is 75-99.5%, and the mass percentage of carbon is 0.5-25%. The method comprises the following specific steps: mixing pyrite and a carbon source substance according to the mass ratio of (75-95): (5-60), dispersing into a dispersing agent, and carrying out ball milling for 1-10 hours, so as to obtain a mixed paste material; drying the obtained mixed paste material for 1-10 hours in a vacuum drying oven at the temperature of 80-150 DEG C, heating the dried precursor material to the temperature of 300-500 DEG C under the protection of inert gas, maintaining for 1-8 hours, then, cooling to room temperature, and sifting, thereby obtaining the iron disulfide/carbon composite positive electrode material for the disposable lithium battery.

The invention discloses a composite cathode material for a thermal battery suitable for long-time terminal heavy current discharge. The composite cathode material is characterized by being prepared from the following components by mass fraction: 30 to 50 percent of CoS2, 30 to 50 percent of NiS2, 1 to 3 percent of Li2O, 15 to 30 percent of an ion conductive agent and 0.5 to 2 percent of an electronic conductor. By adding a NiS2 cathode material, elemental nickel with high conductivity is generated by the NiS2 cathode material in the self-discharge process, and further the later conductivity ofan electrode material is improved; secondly, the conductivity of the whole composite cathode material is improved without affecting the output capacity of the composite cathode material due to the addition of a small amount of a carbon nanotube electronic conductor with high conductivity; and finally, due to the addition of the ion conductive agent, the migration rate of Li<+> in the electrode reaction process is improved and the concentration polarization in the reaction process is reduced.

The invention provides a battery anode, its preparation method and a lithium ion battery using the same. The battery anode includes a conductive substrate and an anode material coated on the conductive substrate. The anode material comprises an anode active material, a conductive agent and a binder. The anode active material contains, based on its total weight, 5wt%-20wt% of layered nickel cobalt lithium aluminate and 80wt%-95wt% of olivine type lithium iron phosphate. The battery anode has the advantages of high capacity and cycling stability.

The invention discloses a positive electrode material of a high-capacity lithium ion battery and a preparation method of the positive electrode material. The preparation method comprises the following steps: dissolving raw materials into de-ionized water to prepare a mixed solution A and a mixed solution B, which have the same volume and different concentrations; adding a sodium hydroxide solution and an ammonia water solution into a container C in a parallel flow manner to be subjected to co-precipitation, so as to prepare a co-precipitate Ni1-x-yCoxAly(OH)2+y precursor; after ageing, filtering, washing and drying the prepared co-precipitate precursor, uniformly mixing the co-precipitate precursor with a lithium source; pressing and molding mixed materials, putting the mixture into a pipe furnace for presintering, and sintering the mixture in an oxygen/oxygen-enriching air airflow to obtain a target product. The positive electrode material of the lithium ion battery, provided by the invention, has no impure phases and has high crystallization quality; the product has a uniformly-distributed grain diameter and a regular spherical shape, and has a very high specific discharge capacity and relatively excellent circulating stability; the positive electrode material can meet high-energy density and high-power charging and discharging requirements, a process is simple and a manufacturing cost is relatively low.

The invention discloses manufacturing equipment and a manufacturing method for an electrode of a power type lithium ion battery. The manufacturing equipment comprises a vibration disk, a foam metal die, an electrode solid-state filler powder box and foam metal, wherein the foam metal die is arranged on the vibrating disk; the electrode solid-state filler powder box is arranged above the foam metal die; and the foam metal is arranged in the foam metal die. The foam metal with the characteristics of high electric conductivity, high thermal conductivity, large specific surface area, uniform and small through holes and the like is adopted as a current collector, and a skeleton structure of the foam metal is inserted into powdery active substances for pressurization to obtain an electrode plate with strong binding force, so that the active substances difficultly fall, the electric conductivity of the active substances of the electrode is effectively improved, internal resistance is lowered, heat produced by the battery is reduced, radiation is facilitated, and the service life of the battery is prolonged; and in addition, a solid-state active substance is used for directly filling the foam metal without an aqueous solution or a non-aqueous solvent, so that the obtained electrode plate is not required to be baked to remove the solvent, the manufacture period of the battery is shortened, energy consumption is reduced, and production cost is saved.

A hydrogen-storing alloy for low temperature nickel-hydrogen power battery is disclosed, having the constituent atom rates as below: La1-x-y-zCexPryNdzNuaCobMncAldBe, wherein x=0.45-0.60, y=0.05-0.07, z=0.15-0.21, a=3.50-3.80, b=0.40-0.65, c=0.25-0.45, d=0.10-0.35, and e=0.05-0.15. The hydrogen-storing alloy can generate the second phase of CeCo4 B-type with high catalysis activeness so as to improve high-current discharge performance and low temperature discharge performance of the hydrogen-storing alloy, therefore the invention can not only be used for the low temperature nickel-hydrogen battery used on condition of -40 DEG C, but still possess excellent high-current discharge performance on condition of -2 DEG C.

The invention discloses a bismuth metal organic framework material, a preparation method of the bismuth metal organic framework material and an application of the bismuth metal organic framework material in lead storage battery anode additives. The bismuth metal organic framework material disclosed by the invention is a porous material, so that the material has high porosity, a large pore volume, a large superficial area and good water solubility and acid stability, and the material can be dispersed in deionized water in advance. The bismuth metal organic framework material can be used as a lead storage battery anode doping material and can improve the utilization rate of active substance and enhance the charge acceptance.