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Preparation method of high-capacity and high-rate anode material suitable for power batteries

A negative electrode material and power battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as low gram capacity and poor rate performance, achieve high gram capacity, good processing performance, and improve overall performance.

Inactive Publication Date: 2018-06-08
内蒙古欣源石墨烯科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention is a method for preparing a high-capacity and high-rate negative electrode material suitable for power batteries, which solves the problems of low gram capacity and poor rate performance of current graphite-based negative electrode materials, and has the advantages of high gram capacity, excellent rate performance, and good processing performance. , to improve the comprehensive performance of negative electrode materials

Method used

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  • Preparation method of high-capacity and high-rate anode material suitable for power batteries
  • Preparation method of high-capacity and high-rate anode material suitable for power batteries
  • Preparation method of high-capacity and high-rate anode material suitable for power batteries

Examples

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Effect test

Embodiment 1

[0030] Step 1. preparation of ferric oxide hollow microspheres

[0031] Put 1.5g of sodium dodecylbenzenesulfonate into 150ml of ethylene glycol, stir well until a clear and transparent solution is formed, then add 5.5g of ferric chloride and 9.5g of sodium acetate and stir well, Pour the solution into a 250ml polytetrafluoroethylene container, put the polytetrafluoroethylene container into a high-pressure reactor, seal it, put it in an oven, let it react at 180°C for 12 hours, and separate the obtained black product with a magnet After that, wash with distilled water and absolute ethanol several times successively, and dry to obtain hollow microspheres of ferric oxide;

[0032] Step ② LiALO 2 Preparation of Composite Solution B

[0033] Add 5g of lithium metaaluminate and 5g of glucose to 100mL of twice distilled water, stir well to obtain LiALO 2 Composite solution B;

[0034] Step ③ Preparation of Solution C

[0035] Weigh 10g of titanium sheet and wash it with nitric ...

Embodiment 2

[0043] Step 1. preparation of ferric oxide hollow microspheres

[0044] Put 1g of sodium dodecylbenzenesulfonate into 100ml of ethylene glycol, stir well until a clear and transparent solution is formed, then add 5g of ferric chloride and 9g of sodium acetate and stir well, then pour the solution Put the polytetrafluoroethylene container into a 250 ml polytetrafluoroethylene container, put the polytetrafluoroethylene container into the high-pressure reactor and seal it, then put it in the oven, let it react at 180 ° C for 12 hours, and the black product obtained is separated by a magnet and used in turn. Wash with distilled water and absolute ethanol several times, and dry to obtain ferric oxide hollow microspheres;

[0045] Step ② LiALO 2 Preparation of Composite Solution B

[0046] Add 4g of lithium metaaluminate and 6g of glucose to 100mL of twice distilled water, stir well to obtain LiALO 2 Composite solution B;

[0047] Step ③ Preparation of Solution C

[0048] Weigh 1...

Embodiment 3

[0056] Step 1. preparation of ferric oxide hollow microspheres

[0057] Put 2g of sodium dodecylbenzenesulfonate into 200ml of ethylene glycol, stir well until a clear and transparent solution is formed, then add 6g of ferric chloride and 10g of sodium acetate and stir well, then pour the solution Put the polytetrafluoroethylene container into a 250 ml polytetrafluoroethylene container, put the polytetrafluoroethylene container into the high-pressure reactor and seal it, then put it in the oven, let it react at 180 ° C for 12 hours, and the black product obtained is separated by a magnet and used in turn. Wash with distilled water and absolute ethanol several times, and dry to obtain ferric oxide hollow microspheres;

[0058] Step ② LiALO 2 Preparation of Composite Solution B

[0059] Add 6g of lithium metaaluminate and 4g of glucose to 100mL of twice distilled water, stir well to obtain LiALO 2 Composite solution B;

[0060] Step ③ Preparation of Solution C

[0061] Weig...

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Abstract

The invention discloses a silicon-carbon composite anode material and a preparation method thereof, and relates to the field of battery materials, in particular to the field of anode materials of lithium ion batteries. The anode material is characterized by being a graphite / ferroferric oxide / lithium metaaluminate / titanium dioxide composite prepared from sodium dodecyl benzene sulfonate, ethylene glycol, ferric chloride, sodium acetate, lithium metaaluminate, glucose, titanium flakes, a sodium hydroxide solution and graphite by multiple physical mixing and chemical reactions. The problems of low gram capacity and poor rate performance of current graphite anode materials are solved, the prepared material has the advantages of high gram capacity, excellent rate performance and good processingperformance, and the comprehensive performance of the anode material is improved.

Description

technical field [0001] The invention relates to the field of battery material preparation, in particular to the field of negative electrode materials for lithium ion batteries. Background technique [0002] At present, commercial anode materials are mainly artificial graphite and natural graphite, but they have problems such as low gram capacity and poor liquid absorption ability, which make it difficult to meet the demand for high-capacity, high-rate anode materials for power batteries. Although the performance of the material can be improved by doping the silicon material and its surface modification, the effect is not obvious or the stability is poor, and it is difficult to industrialize. For example, the patent (CN103022446 A) discloses a lithium-ion battery silicon oxide / carbon Negative electrode materials and preparation methods thereof, although the gram capacity of the prepared materials is improved, the first-time efficiency and cycle performance of the materials ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62H01M4/48H01M4/485H01M4/36H01M10/0525
CPCH01M4/366H01M4/48H01M4/485H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 薛永谢志懋
Owner 内蒙古欣源石墨烯科技股份有限公司
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