A kind of porous silicon-copper composite material and its preparation method and application

A composite material and porous silicon technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of high energy consumption, unsuitability for large-scale industrial production, and high equipment requirements, and achieve large specific surface area, excellent performance, The effect of uniform pore size distribution
CN105826528BActive Publication Date: 2019-01-15ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2019-01-15

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Abstract

The invention discloses a method for preparing a porous silicon-copper composite material.The preparation method specifically comprises the steps that CuO powder and Mg2Si powder are mixed to be uniform to be subjected to heat treatment at the temperature of 600 DEG C-700 DEG C and then subjected to acid pickling and aftertreatment to obtain the porous silicon-copper composite material.According to the preparation method, the preparation technology is simple, the great operability is achieved, the adopted raw materials are rich in source and low in price, and the adopted method way is easily conducted in a factory; particularly, a replacement reaction of magnesium and copper oxide is ingeniously utilized, nano-scale copper particles are generated and uniformly dispersed on the surface of porous silicon while porous silicon is prepared, and the improvement role of copper on the conductivity of a whole material system and the buffer role of the copper particles on the size changes of silicon during extraction and insertion of lithium ions are more fully played.Through the potential method, the silicon-copper composite material with a unique structure can be massively synthesized.
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Description

technical field

[0001] The invention belongs to the field of preparation of composite materials, and in particular relates to a porous silicon-copper composite material and its preparation method and application. Background technique

[0002] Lithium-ion battery, referred to as lithium battery, is a reversible secondary battery that utilizes the insertion and extraction of lithium ions in positive and negative electrode materials to realize charging and discharging. Because of its high capacity, high voltage platform and long cycle life, it is widely used in various electronic products, hybrid vehicles and electric vehicles. As an efficient and clean energy storage method, lithium-ion batteries still have great application development space in the future.

[0003] At present, the commercial lithium-ion battery anode materials mainly use carbon materials represented by graphite. As a negative electrode material for lithium-ion batteries, graphite has only a theoretical spec...

Claims

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