METHOD FOR PRODUCING CURRENT COLLECTOR FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR PRODUCING ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

Intended is to improve the mechanical strength and the durability of a collector for a nonaqueous secondary battery, so that an active substance layer may be carried efficiently in a high adhesion on the surface of the collector. This improvement is achieved by using a pair of working means, which have surfaces pressed toward each other to form a pressing nip portion for allowing a sheet-shaped substance to pass therethrough and which have a plurality of recesses formed in at least one surface. A metal foil for the collector is subjected to a compressing treatment by passing it through the pressing nip portion of the working means so that a plurality of projections are formed on at least one surface of the collector metal foil by the partial plastic deformation caused according to the compressing treatment.