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Preparation method of lithium battery negative electrode multilayer hollow tin oxide material

A tin oxide and lithium battery technology, applied in tin oxide, battery electrodes, nanotechnology for materials and surface science, etc., can solve the problem of affecting high rate charge and discharge performance, low conductivity of metal oxides, capacity fading, etc. Problems, to achieve the effect of facilitating the doping of conductive particles, reducing mobility and reducing wear

Inactive Publication Date: 2018-11-13
FOSHAN TENGLI NEW ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The technical problem mainly solved by the present invention is that there is a huge volume expansion of tin dioxide in the process of charging and discharging cycles, which leads to rapid capacity decay, and the conductivity of the metal oxide itself is not high, which also affects its high rate. Defects in charge and discharge performance, providing a method for preparing a lithium battery negative electrode multilayer hollow tin oxide material

Method used

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  • Preparation method of lithium battery negative electrode multilayer hollow tin oxide material

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example 1

[0026] In parts by weight, take 20 parts of titanium dioxide and 40 parts of deionized water and add them to the hydrothermal reactor, stir at a speed of 200r / min, adjust the pH of the solution to 2.2 with a mass fraction of 20% sulfuric acid solution, and control the temperature of the reactor At 60°C, add 30 parts of a mixed solution of tin tetrachloride and antimony trichloride dropwise under stirring, wherein the mass ratio of tin tetrachloride and antimony trichloride is 14:1, and the mass fraction of the mixed solution is 15%. , keep warm for 50 minutes to obtain the reaction product; filter the above reaction product, remove the filtrate to obtain a filter cake, wash the filter cake with deionized water until the washing liquid is neutral, place it in an oven with a set temperature of 60°C, and dry 10h, grind the dried filter cake through a 200-mesh sieve, put it into a muffle furnace, heat up to 750°C, and calcinate for 7h to obtain conductive titanium dioxide powder; w...

example 2

[0028] In parts by weight, take 23 parts of titanium dioxide and 45 parts of deionized water and add them to the hydrothermal reactor, stir at a speed of 250r / min, adjust the pH of the solution to 2.3 with a mass fraction of 20% sulfuric acid solution, and control the temperature of the reactor At 63°C, 33 parts of a mixed solution of tin tetrachloride and antimony trichloride were added dropwise under stirring, wherein the mass ratio of tin tetrachloride and antimony trichloride was 14:1, and the mass fraction of the mixed solution was 15%. , heat preservation reaction for 55min, to obtain the reaction product; filter the above reaction product, remove the filtrate to obtain the filter cake, wash the filter cake with deionized water until the washing liquid is neutral, put it in an oven with a set temperature of 65°C, and dry 11h, grind the dried filter cake through a 200-mesh sieve, put it into a muffle furnace, heat up to 775°C, and calcinate for 7h to obtain conductive tita...

example 3

[0030] In parts by weight, take 25 parts of titanium dioxide and 50 parts of deionized water and add them to the hydrothermal reactor, stir at a speed of 300r / min, adjust the pH of the solution to 2.5 with a mass fraction of 20% sulfuric acid solution, and control the temperature of the reactor At 65°C, add 35 parts of a mixed solution of tin tetrachloride and antimony trichloride dropwise under stirring, wherein the mass ratio of tin tetrachloride and antimony trichloride is 14:1, and the mass fraction of the mixed solution is 15% , keep warm for 60 minutes to obtain the reaction product; filter the above reaction product, remove the filtrate to obtain a filter cake, wash the filter cake with deionized water until the washing liquid is neutral, place it in an oven with a set temperature of 70°C, and dry 12h, grind the dried filter cake through a 200-mesh sieve, put it into a muffle furnace, heat up to 800°C, and calcinate for 8h to obtain conductive titanium dioxide powder; we...

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Abstract

The invention relates to the technical field of lithium ion battery negative electrode material preparation, in particular to a preparation method of a lithium battery negative electrode multilayer hollow tin oxide material. Expandable graphite is subjected to microwave and ultrasonic treatment into a graphite nanosheet layer; the graphite nanosheet layer can trigger rubber cross-linking reactionin the copolymerization process of acrylonitrile and butadiene; the graphite nanosheet layer reaches nano-dispersion in a rubber substrate; meanwhile, certain intercalated structures exist; a conductive network is formed, so that the conductivity of the lithium battery negative electrode material is improved; nanometer conductive rubber powder is blended into tin oxide suspension; the multilayer hollow tin oxide material is formed; after the tin oxide material expansion, the crystal material abrasion can be reduced through slippage; carbonized tin and titanium at the tin oxide material surfacecan reduce the volume expansion of stannic oxide; the capacity fading caused by volume expansion of stannic oxide is reduced; wide application prospects are realized.

Description

technical field [0001] The invention relates to the technical field of preparation of lithium ion battery negative electrode materials, in particular to a preparation method of a lithium battery negative electrode multilayer hollow tin oxide material. Background technique [0002] With the increasing demand for fossil fuels in modern life and industrial production, the earth is facing increasingly severe environmental problems, which also stimulates people to explore clean and renewable energy that can be applied on a large scale, and for most renewable energy, For example, solar energy and wind energy are intermittent, so the development of high-efficiency energy storage technology is particularly important for the large-scale application of renewable energy. [0003] Lithium-ion batteries have the advantages of large specific energy, high working voltage, no memory effect and environmental friendliness. They are not only widely used in small electrical appliances such as m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02C01B32/907H01M4/48H01M4/485H01M4/62B82Y30/00
CPCB82Y30/00C01B32/907C01G19/02C01P2004/64C01P2004/80C01P2006/40H01M4/48H01M4/485H01M4/625Y02E60/10
Inventor 刘菊花邓博陈帅
Owner FOSHAN TENGLI NEW ENERGY TECH CO LTD
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