Patent ID: 8455385

Claim:
A method of manufacturing a lithium-ion secondary battery positive electrode, the method comprising: a coating material preparing step of preparing a positive electrode active material layer forming coating material by mixing at least a positive electrode active material, a binder, a conductive auxiliary, an organic solvent, and water; and an active material layer forming step of forming a positive electrode active material layer on a current collector by using the positive electrode active material layer forming coating material; wherein the binder is polyvinylidene fluoride produced by emulsion polymerization; and wherein the positive electrode active material layer forming coating material is prepared in the coating material preparing step such that the amount of water added (% by mass) based on the total amount of the organic solvent and water and the pH of the positive electrode active material satisfy the following expression (1): 48≦[the amount of water added+(4.25×the pH of the positive electrode active material)]≦52 (1).