Preparation method of lithium ion battery silicon oxide/carbon composite negative pole material

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high cost, complex process, and limited industrialization, and achieve low cost, simple preparation process, and uniform distribution of components Effect

Active Publication Date: 2013-08-07
加道材料科技嘉兴有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the freeze-drying and high-temperature carbonization processes are relati

Method used

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  • Preparation method of lithium ion battery silicon oxide/carbon composite negative pole material
  • Preparation method of lithium ion battery silicon oxide/carbon composite negative pole material

Examples

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Effect test

Embodiment 1

[0034]Weigh 6.6 g of resorcinol, dissolve it in 10 ml of deionized water, then add 4.4 ml of formaldehyde solution (37~40% by weight), stir evenly to form a solution, this solution is recorded as solution A; measure 30 Dissolve 1 ml tetraethyl orthosilicate in 20 ml absolute ethanol, then add 10 ml deionized water, stir evenly to form a transparent solution, which is recorded as solution B; under stirring conditions, add 0.128 g Na 2 CO 3 , this solution is recorded as solution C; under stirring conditions, add hydrochloric acid dropwise to solution B to adjust the pH value of the solution at 3, and this solution is recorded as solution D; add solution D dropwise to solution C, and continue stirring for 1 h , moved into a water bath for heat preservation, the temperature of the water bath was 60 o C, gel was formed after standing; add absolute ethanol to the gel for aging, replace absolute ethanol every 24 h, repeat twice; put the gel in 80 o Dry in a C oven to obtain a prec...

Embodiment 2

[0037] Weigh 6.6 g of resorcinol, dissolve it in 10 ml of deionized water, then add 4.4 ml of formaldehyde solution (37~40% by weight), stir evenly to form a solution, this solution is recorded as solution A; measure 20 Dissolve 1 ml tetraethyl orthosilicate in 20 ml absolute ethanol, then add 10 ml deionized water, stir evenly to form a transparent solution, which is recorded as solution B; under stirring conditions, add 0.256 g Na 2 CO 3 , this solution is recorded as solution C; under stirring conditions, add hydrochloric acid dropwise to solution B to adjust the pH value of the solution at 4, and this solution is recorded as solution D; add solution D dropwise to solution C, and continue stirring for 1 h , moved into a water bath for heat preservation, the temperature of the water bath was 60 o C, gel was formed after standing; add absolute ethanol to the gel for aging, replace absolute ethanol every 24 h, repeat twice; put the gel in 80 o Dry in a C oven to obtain a pre...

Embodiment 3

[0040] Weigh 6.6 g of resorcinol, dissolve it in 10 ml of deionized water, then add 2.2 ml of formaldehyde solution (37-40% by weight), stir evenly to form a solution, and record this solution as solution A; measure 15 Dissolve 1 ml tetraethyl orthosilicate in 20 ml absolute ethanol, then add 10 ml deionized water, stir evenly to form a transparent solution, which is recorded as solution B; under stirring conditions, add 0.128 g Na 2 CO 3 , this solution is recorded as solution C; under stirring conditions, add hydrochloric acid dropwise to solution B to adjust the pH value of the solution at 3, and this solution is recorded as solution D; add solution D dropwise to solution C, and continue stirring for 1 h , moved into a water bath for heat preservation, the temperature of the water bath was 60 o C, gel was formed after standing; add absolute ethanol to the gel for aging, replace absolute ethanol every 24 h, repeat twice; put the gel in 80 o Dry in a C oven to obtain a prec...

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Abstract

The invention provides a preparation method of a silicon oxide/carbon negative pole composite material for lithium ion batteries, belonging to the fields of new materials and electrochemistry. The silicon oxide/carbon composite material provided by the invention uses a porous carbon material with a xerogel or aerogel structure as a matrix, and silicon oxide particles are uniformly dispersed in the carbon matrix. Resorcinol and formaldehyde are used as matrix raw materials, organosilicon is used as a silicon source, and a one-step sol-gel method in combination with a heat treatment technique is utilized to prepare the nano silicon oxide/carbon composite negative pole material. The invention has the advantages of simple technical process, controllable reaction and mild conditions, and is convenient for large-scale preparation. The silicon oxide/carbon composite negative pole material prepared by the method has higher specific capacity and favorable loop stability, is an ideal lithium ion battery negative pole material, and can be widely used in the fields of various portable electronic devices, electric automobiles, aerospace and the like.

Description

technical field [0001] The invention belongs to the field of new materials and electrochemistry, and in particular relates to a preparation method of a novel silicon oxide / carbon composite negative electrode material for a rechargeable and dischargeable lithium ion battery. technical background [0002] With the development of industries such as electronics, communications, aerospace, and automobiles, and the increasing demand for electrification of daily necessities, people's requirements for miniaturization and high energy of lithium-ion batteries are becoming increasingly urgent. At present, the commercial lithium-ion battery anode materials are mainly graphite anode materials. After a lot of improvement work, the actual lithium storage capacity of graphite is getting closer and closer to its theoretical capacity (the theoretical capacity of graphite is 372 mAh / g, 855 mAh / g cm 3 ), it is difficult to meet the high energy density requirements of portable electronic device...

Claims

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Application Information

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IPC IPC(8): H01M4/1391H01M4/131H01M4/133H01M4/1393
CPCY02E60/122Y02E60/10
Inventor 赵海雷吕鹏鹏刘欣李兴旺
Owner 加道材料科技嘉兴有限公司
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