A kind of preparation method of carbon-silicon composite material

A composite material, carbon-silicon technology, applied in the field of preparation of carbon-silicon composite materials, can solve the problems that are not conducive to high-capacity lithium-ion batteries and low capacity, and achieve the effect of promoting sustainable development, wide sources, and cheap raw materials

Active Publication Date: 2016-08-24
GUANGDONG HAOMEI ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The maximum discharge specific capacity of the composite material is 512mAh / g, the capacity is low, which is not conducive to be used as a high-capacity lithium-ion battery

Method used

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  • A kind of preparation method of carbon-silicon composite material
  • A kind of preparation method of carbon-silicon composite material
  • A kind of preparation method of carbon-silicon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing a carbon-silicon composite material, comprising the steps of:

[0028] S1. Pretreatment: first wash the betel nut shells with deionized water and cut them into pieces, put them in 1mol / L sodium hydroxide solution, soak in a water bath at 80°C for 10 hours, then put them in 1mol / L dilute Boil in hydrochloric acid solution until the betel nut shell is completely swollen, then wash the betel nut shell and then vacuum dry it for later use at a temperature of 55°C;

[0029] S2. Preparation of betel nut shell powder: put the treated betel nut shell into a tubular resistance furnace, carbonize for 1-2 hours under the protection of nitrogen, the carbonization temperature is 850-1000°C, and the heating rate is 1-10°C / min; The carbonized betel nut shells are put into a mortar and repeatedly ground into betel nut shell powder;

[0030] S3. Preparation of carbon-silicon composite material: mix betel nut shell powder, nano-silicon powder, artificial graphite ...

Embodiment 2

[0032] Except that betel nut shell powder, nano-silicon powder, artificial graphite powder and alcohol are mixed in a mass ratio of 2:4:1:0.8 in step S3, the others are the same as in Example 1.

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Abstract

The invention discloses a preparation method of a novel carbon silicon composite material. The preparation method comprises the following steps: adopting areca nut shells as a carbon source; after carrying out acid and alkali treatment on the areca nut shells, carbonizing into areca nut shell powder, then mixing the areca nut shell powder, nano silicon powder, artificial graphite powder and ethanol at a mass ratio of 1-2: 2-4: 0.5-1.0: 0.2-0.8; slowly adding into a ball mill, mechanically ball-milling for 18-22 hours, and then screening to obtain the carbon silicon composite material. The preparation method disclosed by the invention has the advantages that the cost is low, the preparation is simple, and a lithium battery prepared by utilizing the preparation method has a large capacity.

Description

technical field [0001] The invention relates to a lithium-ion battery electrode material, in particular to a preparation method of a carbon-silicon composite material. Background technique [0002] In recent years, with the gradual reduction of non-renewable energy sources and more and more serious environmental problems in the world, green and pollution-free new high-energy chemical power sources have become a hot spot for the development of countries all over the world. Due to the advantages of high energy, long life, low consumption, no pollution, no memory effect, small self-discharge, low internal resistance, high cost performance, and less pollution, lithium-ion batteries are widely used in optoelectronics, information, transportation, national defense and military fields. . With the continuous development of miniaturized electronic equipment and the increasing demand for high-energy electronic equipment, people's requirements for miniaturized electronic equipment con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/38H01M4/587
CPCH01M4/362H01M4/386H01M4/587H01M10/0525Y02E60/10
Inventor 赵灵智张怡琼唐芬玲朱雁飞
Owner GUANGDONG HAOMEI ALUMINUM
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