NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery which can suppress increase of inner resistance caused by a repetitive charging discharging, and has high capacity and high output characteristic. SOLUTION: In the nonaqueous electrolyte secondary battery comprising a positive electrode formed by bonding lithium transition metal composite oxide as a positive electrode active material using a bonding agent, a negative electrode, and nonaqueous electrolyte comprising lithium salt sissolved in an organic solvent, 0.1 to 2 vol.% (where the whole of nonaqueous electrolyte is 100 vol.%) of at least one of conductive high molecular weight monomers having alkyl group which can be electrochemically polymerized within an operation voltage of the battery is added to the nonaqueous electrolyte.