NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To obtain a nonaqueous electrolyte secondary battery with excellent discharge characteristics and cycle characteristics even under severe conditions such as boosting charge or large-current discharge for a high-power purpose. SOLUTION: In the nonaqueous electrolyte secondary battery comprising a cathode provided with a mixture layer containing a cathode active substance in a core material, an anode provided with a mixture layer containing an anode active substance in a core material, and a separator as well as a nonaqueous electrolyte intercalated between the cathode and the anode, an electrolyte solution retaining layer is provided at either end in a width direction of the separator. COPYRIGHT: (C)2007,JPO&INPIT