A method for preparing carbon-silicon composite materials by biological method

A composite material and biological method technology, applied in the field of biological preparation of carbon-silicon composite materials, can solve the problems of chicken manure environmental pollution, carbon-silicon composite materials are prone to agglomeration, etc. simple effect

Active Publication Date: 2019-02-19
张绍乙
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a method for preparing carbon-silicon composite materials by biological methods. The method for preparing carbon-silicon composite materials by biological methods should solve the problem of preparing carbon-silicon composite materials in the prior art. During the process, the carbon-silicon composite material is prone to agglomeration technical problems, and at the same time, the technical problem of environmental pollution caused by chicken manure must be solved

Method used

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  • A method for preparing carbon-silicon composite materials by biological method
  • A method for preparing carbon-silicon composite materials by biological method
  • A method for preparing carbon-silicon composite materials by biological method

Examples

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Effect test

Embodiment 1

[0036]1. Weigh 100g of bean cake, soybean meal and corn flour respectively, place them in a muffle furnace, raise the temperature to 600°C at a heating rate of 5°C / min under a nitrogen atmosphere, and carry out high-temperature carbonization at a constant temperature for 4 hours, and then continue to Cool naturally to room temperature under a nitrogen atmosphere; take out the cooled residue, weigh it, and calculate the weight ratio before and after carbonization;

[0037] 2. Taking the preparation of 450mAh / g carbon-silicon composite material as an example, the carbon-silicon ratio in this material is calculated according to the formula Q=4200*x+372*(1-x), and the silicon-carbon ratio x is 0.0204;

[0038] 3. Mix soybeans, bean cakes, and bean curd powder in a weight ratio of 1:1:1 as raw materials for chicken feed. The raw materials for chicken feed and monocrystalline silicon are respectively pulverized into particles of 5-30 microns by a pulverizer, and then mixed according ...

Embodiment 2

[0046] 1. Weigh 100g of soybeans, bean cakes, and bean coriander powder respectively, place them in a muffle furnace, raise the temperature to 600°C at a heating rate of 5°C / min under a nitrogen atmosphere, and carry out high-temperature carbonization at a constant temperature for 4 hours, and then continue to Naturally cool to room temperature under the atmosphere; take out the cooled residue, weigh it, and calculate the weight ratio before and after carbonization;

[0047] 2. Taking the preparation of 450mAh / g carbon-silicon composite material as an example, the carbon-silicon ratio in this material is calculated according to the formula Q=1970*x+372*(1-x), and the silicon-carbon ratio x is 0.0488;

[0048] 3. Mix soybeans, bean cakes, and bean curd powder in a weight ratio of 1:1:1 as raw materials for chicken feed. The raw materials for chicken feed and silicon oxide-containing materials are respectively pulverized into particles of 5-30 microns by a pulverizer, and then ac...

Embodiment 3

[0056] 1. Weigh 100g of soy flour, corn flour and sorghum flour respectively, put them in a muffle furnace, raise the temperature to 600°C at a rate of 5°C / min under a nitrogen atmosphere, and carry out high-temperature carbonization at a constant temperature for 4 hours, and then continue Naturally cool to room temperature under a nitrogen atmosphere; take out the cooled residue, weigh it, and calculate the weight ratio before and after carbonization;

[0057] 2. Taking the preparation of 450mAh / g carbon-silicon composite material as an example, the silicon-carbon ratio in this material is calculated according to the formula Q=869*x+372*(1-x), and the silicon-carbon ratio x is 0.1569;

[0058] 3. Mix soybeans, bean cakes, and bean curd powder in a weight ratio of 1:1:1 as raw materials for chicken feed. The raw materials for chicken feed and materials containing silicon carbide are respectively pulverized into particles of 5-30 microns through a pulverizer, and then according ...

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Abstract

The invention provides a biological preparation method for a carbon-silicon composite. The biological preparation method comprises the following steps: subjecting raw materials for a chicken feed and a silicon-containing material to mixing and granulation; feeding chicken flocks with the obtained silicon-containing chicken feed, allowing silicon-containing chicken feed to be fully mixed in the gizzards of chickens through digestion and allowing an organic carbon-source compound to coat the silicon-containing material in advance; allowing undigestable micro powder of the silicon-containing material and an undigested organic carbon-source compound to be discharged out in the form of chicken manure, collecting the silicon-containing chicken manure and carrying out drying and homogenization; and subjecting the homogenized silicon-containing chicken manure to high-temperature carbonization in an inert atmosphere so as to obtain the carbon-silicon composite. According to the invention, the gizzards of chickens, a biological stirrer, are made full use of for preparation of a precursor of the carbon-silicon composite, so the problem of pollution caused by the chicken manure is overcome, and the added value of the chicken manure is increased.

Description

technical field [0001] The invention belongs to the field of preparation of lithium battery materials, in particular to a method for preparing carbon-silicon composite materials by a biological method. Background technique [0002] Silicon is the most potential negative electrode candidate material for lithium-ion batteries. Due to the volume expansion of more than 300% during the lithium intercalation process, the application of silicon in lithium-ion batteries has been greatly hindered. In order to overcome the volume effect of silicon, silicon-based composite materials are widely used to improve the cycle performance of silicon anode materials. On the one hand, nano-silicon powder can reduce the absolute volume change of silicon particles caused by lithium ion intercalation and reduce the internal stress of the composite; on the other hand, the weak volume change phase in the composite can buffer or limit the volume change of silicon. [0003] The similar chemical proper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/021C01B32/05A23K50/75A23K20/20H01M4/36H01M4/38H01M4/62H01M10/0525
CPCA23K20/20A23K50/75C01B33/021C01P2002/72C01P2002/85C01P2004/03H01M4/362H01M4/386H01M4/625H01M10/0525Y02E60/10
Inventor 张绍乙张绍凡闵凡奇张道明党国举张全生
Owner 张绍乙
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