A lithium ion battery silicon / graphite composite negative electrode material production method of

A method of preparing a lithium ion battery silicon / graphite composite negative electrode material, and belongs to the field of electrochemical new materials, the problem to be solved is to provide a highly practical than the composite electrode material capacity and excellent cycling stability and rate capability and economy the electrode preparation process. A foam metal as the electrode substrate, nano elemental silicon powder as a starting material, the nano silicon powder dropped by foamed metal blank, such that the silicon powder is uniformly supported on the dendritic structure of the surface of the foam metal mesh. Using metal catalysis, a uniform layer of graphite to the metal surface of the package loaded with silicon powder prepared silicon / graphite composite electrode without a binder. High specific capacity of the material of the present invention, a novel structure, and good rate capability and cycle stability. This method is simple and economic, can be prepared in large quantities using nano silica fume good electrochemical performance of negative electrode business, it can be widely used in various portable electronic devices, electric vehicles and aerospace and other fields.