| 摘要 |
PROBLEM TO BE SOLVED: To enhance weight energy density of a battery by using a resin film having a conductive thin film on the surface and including conductive fillers in the inside of the film of a current collector. SOLUTION: A resin film having a conductive film on the surface is used as a current collector, an conductive fillers are contained in a part or the whole of the resin film. By this constitution, even if current collecting effect of the conductive film on the surface is insufficient, an electron conducting network of the current collector can be made perfect with the conductive fillers interposed on the inside of the resin film. Even in high rate charge/discharge, capacity is hardly lowered. As the conductive fillers, a carbonaceous material, metal powder, fibrous metal, porous metal, and a mixture of them are preferably used. As the conductive film formed on the surface of the resin film, a metal material and a carbonaceous material are preferable. This current collector can be used in a positive electrode and/or a negative electrode. |
