MANUFACTURING METHOD OF NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

A manufacturing method of a nonaqueous electrolyte secondary battery includes: a lithium phosphate dispersion manufacturing step of manufacturing a lithium phosphate dispersion by dispersing lithium phosphate in a solvent without adding a positive-electrode active material; a positive electrode mixture paste manufacturing step of manufacturing a positive electrode mixture paste by mixing the lithium phosphate dispersion with a positive electrode material including the positive-electrode active material; and a step of manufacturing a positive electrode including a positive electrode mixture layer on a surface of a current collector member by applying the positive electrode mixture paste on the surface of the current collector member and drying the positive electrode mixture paste.

主权项

1. A manufacturing method of a nonaqueous electrolyte secondary battery, the manufacturing method comprising:
a lithium phosphate dispersion manufacturing step of manufacturing a lithium phosphate dispersion by dispersing lithium phosphate in a solvent without adding a positive-electrode active material; a positive electrode mixture paste manufacturing step of manufacturing a positive electrode mixture paste by mixing the lithium phosphate dispersion with a positive electrode material including a positive-electrode active material having an operation upper limit potential of 4.35 V or more on a metallic lithium basis; a step of manufacturing a positive electrode including a positive electrode mixture layer on a surface of a current collector member by applying the positive electrode mixture paste on the surface of the current collector member and drying the positive electrode mixture paste; a step of assembling the nonaqueous electrolyte secondary battery by accommodating, in a battery outer case, the positive electrode, a negative electrode, and a nonaqueous electrolyte containing a compound having fluorine element; and a step of performing initial charge on the nonaqueous electrolyte secondary battery.