502results about How to "Promote prolapse" patented technology

The invention discloses a modified high nickel ternary positive electrode material. The surface of a high nickel ternary positive electrode material is coated with a coating layer containing a fast ion conductor. The fast ion conductor has the chemical general formula of Li3x1La2/3-x1Ma1TiNz1O3, Li2+2x2Zn1-x2GeO4 or LiM'2(PO4)3, wherein M represents Ba<2+> and/or Sr<2+>, N represents Al<3+> and/orZr<4+>, x1 is greater than or equal to 0.04 and less than or equal to 0.167, a1 is greater than or equal to 0 and less than or equal to 1, z1 is greater than or equal to 0 and less than or equal to 1, x2 is greater than -0.3 and less than 0.8, and M' represents one or more of Zr, Ti, Ge and Hf. Compared with the existing positive electrode material, the modified high nickel ternary positive electrode material is provided with the coating layer containing the fast ion conductor and the coating layer can react with residual lithium on the surface of the material to reduce residual lithium on the surface of the material and inhibit side reactions of the residual lithium and the electrolyte so that material surface stability and cycle performances are improved. The modified high nickel ternary positive electrode material has good lithium ion deintercalation ability, improves the first discharge capacity of the material and first coulombic efficiency and has a good application prospect. The invention also discloses a preparation method of the modified high nickel ternary positive electrode material and a lithium ion battery.

The invention discloses a preparation method of graphene oxide and a graphene oxide composite material and a use of the graphene oxide and the graphene oxide composite material in a sodium-ion battery. The graphene oxide and the graphene oxide composite material can be used as sodium-ion battery cathode materials. The graphene oxide composite material is prepared from the graphene oxide and metals or metal oxides by a compounding method, wherein the metals comprise Ag, Au, Cu, Fe, Sn, Si, Ni and Sb, the metal oxides comprise nickel oxide, copper oxide, tin oxide, antimony oxide, cobalt oxide, iron oxide and manganese oxide and a mass percentage of the graphene oxide is in a range of 10-80%. The graphene oxide and the graphene oxide composite material prepared by a plurality of effective processes can be used as sodium-ion battery cathode materials, have the advantages of high specific capacity and good cycling stability, have a low manufacturing cost and are suitable for sodium-ion battery large-scale exploitation and application.

The invention relates to a lithium ion battery composite cathode material and a preparation method thereof, which belongs to the technical field of lithium ion battery. The invention aims at improving the cycle performance of silicon cathode material at the same time when keeping the high ratio volume of lithium ion battery silicon cathode material. The proposal of the invention is that silica-based material coated by disordered carbon is treated with surface modification processing by utilizing lithium salt, namely, the lithium salt is coated on the surface of Si/G/DC (silicon/graphite/disordered carbon) to be prepared into the composite cathode material, therefore, the lithium-embedding and removing depth of the silicon can be effectively controlled, and the material is the lithium ion battery composite cathode material which has high specific capacity and good cyclical stability; furthermore, the material is safe and pollution-free, and presents higher thermal stability in various lithium salt electrolytes and solvents.

The invention provides a nickel cobalt lithium manganite precursor of a nanosheet agglomeration secondary particle. The growth mode inside the precursor is hexagonal nanosheets which are stacked, the side length of the hexagonal nanosheet is 200-500 nanometers, and the thickness is 70-200 nanometers; the particle size of the agglomeration secondary particle D10 is bigger than or equal to 6 micrometers, D50 is equal to 9-15 micrometers, and D90 is smaller than or equal to 30 nanometers. The preparing method of the nickel cobalt lithium manganite precursor of the nanosheet agglomeration secondary particle comprises the steps of firstly preparing a soluble mixed brine solution, adding ammonium hydroxide as a base solution of a reaction kettle, and adjusting the pH of the base solution to be 11-12; inflating nitrogen into the reaction kettle and starting stirring; adding the soluble mixed brine solution, a strong alkaline solution and ammonium hydroxide into the reaction kettle for a stirring reaction, after the reaction for some time, making unqualified feed circularly pumped into the reaction kettle, and aging, compressing and washing an overflowed feed; after washing, drying, screening and storing the material. The nickel cobalt lithium manganite precursor of the nanosheet agglomeration secondary particle is better in uniformity and electrochemical performance; moreover, the product stability is good.

The invention relates to a molybdenum disulfide/nitrogen-doped carbon nanofiber composite material and a preparation method and an application thereof. The composite material is of a pipe sleeving structure, a molybdenum disulfide fiber core is arranged in the composite material and a nitrogen-doped carbon nanofiber shell is arranged outside the composite material; and a gap is arranged between the molybdenum disulfide fiber core and the nitrogen-doped carbon nanofiber shell. The preparation method comprises the steps of dissolving ammonium thiomolybdate and polymethyl methacrylate into a solvent and carrying out electrostatic spinning to obtain a polymethyl methacrylate/ammonium thiomolybdate nanofiber; carrying out drying and surface treatment, immersing the nanofiber into a pyrrole/hydrochloric acid solution, dropwise adding a ferric chloride/hydrochloric acid solution and carrying out in-situ polymerization to obtain the fiber coated with polypyrrole on the surface; and washing and drying the fiber, carrying out high-temperature reduction under the condition of taking an argon/hydrogen mixed gas as a protective atmosphere and then carrying out high-temperature carbonization under an argon condition. The composite material has high specific capacity and good cycle stability, and can be used as an efficient and safe novel negative electrode material of a lithium-ion battery.

The invention relates to the technical field of lithium ion batteries, in particular to a coating structure applicable to high-voltage charge-discharge and a manufacturing method of the coating structure. A first metal oxide layer and a second metal oxide layer coat the surface of a cathode material layer, the first metal oxide layer coats the surface of the cathode material layer, the second metal oxide layer coats the outer surface of the first metal oxide layer, and the weight of the first metal oxide layer occupies 40 to 70 percent of the total weight of the first metal oxide layer and the second metal oxide layer. The coating structure contains active substances, so the first charge-discharge efficiency of a material is improved; by a surface ceramic oxide layer, corrosion of hydrogen fluoride (HF), release of metal ions and extraction of active oxygen are well inhibited; and a lithium ion secondary battery with the structure is applicable to charge-discharge at high voltage of more than 4.30 V, high in energy density, high in cycle performance and high in safety performance, and high-temperature storage performance is greatly improved.

The invention provides a diaphragm, a preparing method of the diaphragm and a lithium ion battery comprising the diaphragm. The diaphragm comprises a polymer substrate and slurry layers positioned at the inside and on the surface of the substrate; each slurry layer comprises ceramic particles and curing resin; the curing resin is obtained through performing cross-linking and curing reaction on curing agents or initiating agents positioned inside the substrate and cross-linking resin positioned in the slurry layers; the high-temperature-resistant performance of the diaphragm is excellent; a heat-resistant layer cannot easily fall; and the winding, the preparation and the practical application are easier.

The invention discloses a zinc oxide (ZnO)/reduced graphene oxide/polypyrrole (ZnO/RGO/PPy) ternary composite material, which belongs to the technical field of composite material. The ZnO/RGO/PPy ternary composite material is prepared by a two-step method, including preparing a uniformly-dispersed binary composite material ZnO/reduced graphene oxide (ZnO/RGO), and polymerizing pyrrole (Py) monomer by chemical oxidation method by using the binary composite material as a template to obtain the ZnO/RGO/PPy ternary composite material. The ZnO/RGO/PPy ternary composite material prepared by the invention has both the electric double layer capacitance characteristics of RGO and pseudocapacitor energy storage characteristics of ZnO and Ppy, so that the composite material can show high electrochemical capacitance behavior, excellent rate capability, good circulation stability, and has high energy densigh and power density, , and can be used as the electrode material of a super capacitor.

The invention discloses a sulfur-doping porous carbon material of a sodium ion battery and a preparation method of the sulfur-doping porous carbon material. The sulfur-doping porous carbon material is formed by chemical doping of sulfur in a carbon material, and the carbon material has a loosen and porous spongy structure. The preparation method comprises the following step of preparing a metal organic frame material from a metal inorganic salt and an organic ligand by an in-situ growth method; and grinding and mixing the metal organic frame material and sulfur powder, placing the obtained mixture in an inert gas, carrying out low-temperature thermal treatment and then carrying out high-temperature carbonization on the obtained mixture, and washing and drying the carbonized product to obtain the sulfur-doping porous carbon material. The sulfur-doping porous carbon material prepared according to the method has excellent long-circulation stability, favorable rate performance and high specific capacity when taken as a negative electrode of the sodium ion battery; and moreover, the preparation method is simple, is low in cost and has wide industrial application prospect.

The invention discloses a high-nickel and low-cobalt ternary cathode material and a preparation method thereof. The chemical general formula of the material is Li[Ni0.975Co0.0125Mn0.0125]1-xMxO2, wherein x is mole percent and is greater than or equal to 0.01 and is smaller than or equal to 0.05; M is one or a combination of Sc, Y, Zr, Ti, Mg or Al. The preparation method comprises the following steps: preparing a precursor by adopting a co-precipitation method; then synthesizing a cathode material which contains excessive lithium and is doped with M ions by adopting a simple solid phase method; the cost of a product is low; the preparation method of the high-nickel and low-cobalt ternary cathode material has the advantages of simplicity and easiness in control, wide source of raw materialsand easiness in industrial production; the prepared material has the advantages of good crystallinity, no impurity phase, fine and evenly-distributed particles as well as high discharge capacity andexcellent cycle performance.

The application provides a battery diaphragm and a lithium ion battery. The battery diaphragm comprises a porous base film and a lithium-replenishing coating attached to one side of the porous base film. The lithium-replenishing coating comprises a lithium-replenishing material and a first binder. The lithium-replenishing material comprises a core and a coating layer on the surface of the core. The material of the core comprises a lithium ion compound. The material of the coating layer comprises carbon. The lithium ion compound has a first delithiated capacity greater than a first lithiated capacity, or the lithiated potential of a delithiated product of the lithium ion compound is less than or equal to 3V. The application further provides a lithium ion battery comprising a positive electrode, a negative electrode and a diaphragm, wherein the lithium-replenishing coating of the battery diaphragm is opposite to the positive electrode. The battery is prepared by forming the lithium-replenishing coating in one side of the battery diaphragm and arranging the lithium-replenishing coating of the diaphragm opposite to the positive electrode, thus, the battery capacity is greatly improved.Further, the diaphragm also has good mechanical properties and high temperature resistance.

The invention relates to a method for preparing a spinel-doped lithium-enriched lithium manganate anode material through doping zirconium. The method is characterized by respectively weighing compounds of lithium, manganese and zirconium according to the fact that the mol ratio of lithium ions (x) to manganese ions (y) to zirconium ions (z) is (0.95-1.06):(1.05-1.20):(0.05-0.20); y+z is greater than or equals to 1.20 and is less than or equals to 1.25. The compounds of the lithium, the manganese and the zirconium are mixed and added with wet milling mediums to prepare a precursor 1; the precursor 1 is dried to prepare a precursor 2; the LixMnyZrzO12 spinel-doped lithium-enriched lithium manganate anode material is prepared by the precursor 2 through the two-stage sintering method. Zirconium-doped samples prepared by the invention are high in structure stability, so that the lithium ions are conveniently embedded in and released out when charging and discharging, and excellent foundation is laid for the industrialization.

The application provides a battery diaphragm comprising a porous base film and a lithium-replenishing coating attached to one side of the porous base film. The lithium-replenishing coating comprises alithium-replenishing material and a first binder. The lithium-replenishing material comprises a core and a coating layer on the surface of the core. The material of the core comprises a lithium ion compound. The material of the coating layer comprises a conductive polymer. The lithium ion compound has a first delithiated capacity greater than a first lithiated capacity, or the lithiated potentialof a delithiated product of the lithium ion compound is less than or equal to 3V. The application further provides a lithium ion battery comprising a positive electrode, a negative electrode and a diaphragm, wherein the lithium-replenishing coating of the battery diaphragm is opposite to the positive electrode. The battery is prepared by forming the lithium-replenishing coating in one side of thebattery diaphragm and arranging the lithium-replenishing coating of the diaphragm opposite to the positive electrode, thus, the battery capacity is greatly improved. Further, the diaphragm also has good mechanical properties and high temperature resistance.

The invention relates to a preparation method of an element doped manganese dioxide electrode material for a supercapacitor; the preparation method is characterized in that the high-energy ball milling method is adopted to mix any one of Al, Ti, Ni and Fe with manganese atoms in manganese dioxide according to the ratio of 0.05: 0.95 and then the mixture is placed in a high-energy ball milling tank, a ball milling medium is selected from agate balls with the different diameters, ratio of grinding media to material is 20:1, ethanol is added for preventing the agglomeration, the ball milling speed is 250 turns/minute, the ball milling time is controlled to be 15 hours; products are taken out after the ball milling tank is cooled to the room temperature, the drying at the constant temperature of 80 DEG C is carried out in a drying box for 48 hours; the powder after the drying is ground in an agate mortar to obtain the element doped manganese dioxide supercapacitor electrode material prepared by ball milling. The preparation method has low cost and simple preparation technology, the obtained element doped manganese dioxide electrode material has uniform distribution, high specific capacitance and good cycle stability; the preparation method can be applied in occasions which need power supply with neutral electrolyte, high stability and high power density.

Provided is a preparation method of a carbon cloth/carbon nanotube/manganese dioxide hybridization supercapacitor electrode material. According to the preparation method, a plasma chemical vapor deposition method is used for directional growth of orderly carbon nanotubes of great binding force on a carbon cloth, and a hydrothermal mode is used for completely coating the periphery of the carbon nanotubes with a layer of nano sheet-like alpha-MnO2 active substances. The hybridization electrode material prepared through the method is simple in structure and has a directional porous channel for facilitating the embedding, removing and diffusion of the plasma, thereby having the characteristics such as high capacity and high cycle performance.

The invention discloses a method for preparing a high-rate nickel cobalt lithium aluminate anode material. The method comprises the following steps: (1) preparing a nickel cobalt lithium aluminate precursor; (2) performing lithium-site doping and modifying on potassium ions; and (3) constructing a cladding layer of a lithium-containing compound. According to the method, the dispersing speed of lithium ions is effectively increased by lithium-site replacement of potassium ions, and the rate capability of a material can be improved; the lithium-containing compound layer constructed on the material surface can be used for reducing the content of alkali remained on the material surface and reduce later cell bubbling; side reaction can be effectively inhibited, and the material structure stability in the cycling process can be promoted; and the lithium-containing compound layer has high conducting performance for lithium ions, embedding and separating of lithium ions can be accelerated, the problem of poor lithium ion conductivity when conventional metal oxide is used as the cladding layer can be solved, and the cycling performance and rate performance of the material can be improved.

The invention provides a battery diaphragm including a porous base film and a lithium-replenishing coating attached to one side of the porous base film. The lithium-replenishing coating comprises a lithium-replenishing material and a first binder. The lithium-replenishing material comprises a core and a coating layer on the surface of the core, the material of the core comprises a lithium-ion compound, and the material of the coating layer comprises carbon and metal carbide. The invention also provides a power battery and a vehicle. The power battery includes a positive electrode, a negative electrode and the diaphragm, and the lithium-replenishing coating of the battery diaphragm just faces the positive electrode. The vehicle includes the power battery. According to the invention, the battery is prepared by forming the lithium-replenishing coating at one side of the battery diaphragm and allowing the lithium-replenishing coating of the diaphragm to face a positive electrode piece, thebattery capacity is greatly improved, and the diaphragm has good mechanical properties and high-temperature resistance performance.