| abstract |
Carbon particles having a graphite structure and having a carbonaceous material attached to at least part of the surface thereof, and fibrous carbon. In the carbon material, the carbonaceous material is obtained by subjecting the composition containing the polymer to heat treatment. It is preferable that the fibrous carbon adheres the carbon particles with a carbonaceous material obtained by subjecting the composition containing the polymer to heat treatment. As a result, when the carbon material is used as the negative electrode active material for the secondary battery, the conductivity can be improved, and the characteristics of withstanding a large current load and the cycle characteristics can be improved. By coating the carbonaceous material on the carbon particles having the graphite structure, destruction of the graphite structure by the polyethylene carbonate electrolyte can be prevented. |