POSITIVE ELECTRODE, NONAQUEOUS ELECTROLYTE ENERGY STORAGE DEVICE, METHOD OF PRODUCING POSITIVE ELECTRODE, AND METHOD OF PRODUCING NONAQUEOUS ELECTROLYTE ENERGY STORAGE DEVICE

A positive electrode according to one aspect of the present invention is a positive electrode for a nonaqueous electrolyte energy storage device, including a positive composite having a density of 3.1 g/cmor more, in which the positive composite contains a positive active material containing nickel and a reducing organic acid. The nonaqueous electrolyte energy storage device according to one aspect of the present invention is a nonaqueous electrolyte energy storage device including the positive electrode.