POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE BATTERY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

To provide a positive electrode for non-aqueous electrolyte battery free from internal short circuit and large in charging and discharging capacity. A positive electrode for non-aqueous electrolyte battery includes a positive electrode collector, a coated film of a positive electrode active material formed on the collector, an non-uniform area formed along an end portion of the coated film, in which a thickness of the positive active material changes, and protruding insulators erected on the non-uniform area and a part of a surface of the collector adjacent to the non-uniform area. The protruding insulators erected on a surface of the non-uniform area are mutually independent and disposed at an arrangement density low enough to allow transfer of a battery reactive material through the surface of the non-uniform area. The protruding insulators erected on a part of the surface of the collector are disposed at an arrangement density higher than that of the protruding insulators erected on a surface of the non-uniform area. The present invention further provides a non-aqueous electrolyte secondary battery using the above positive electrode.