SILICON-CONTAINING CARBONACEOUS COMPOSITE MATERIAL

摘要

A silicon-containing carbon-based composite material represented by the composition formula: SiOxCyHz (in the formula, x is 0.8-1.7, y is 1.4-7.5, and z is 0.3-1.3). It is preferable that the composite material be obtained by crosslinking (A) a crosslinkable group-containing organic compound and (B) a silicon-containing compound which is capable of forming bonds with the abovementioned crosslinkable group-containing organic compound, and heat treating the resultant cured product. The composite material has a high reversible capacitance and stable charge/discharge cycle characteristics, and also has a high initial charge/discharge efficiency and is ideal for electrodes in electricity storage devices, in particular lithium or lithium ion secondary batteries.