Patent ID: 11011750

Abstract:
A method for producing a positive electrode sheet is provided with a positive current collecting foil made of aluminum and a battery positive active material layer containing positive active material particles made of LiNiMn based spinel and applied and dried on the current collecting foil. The positive active material layer includes a first binder made of polyacrylic acid with a molecular weight of 50,000 or less and a second binder made of polyacrylic acid with a molecular weight of 300,000 or more. The first positive electrode paste forming the positive active material layer satisfies expressions (1) to (3): α≥1.7  (1)β≥0.9  (2)α+β≤3.0  (3) where α is an additive amount of the first binder in pts. wt. and β is an additive amount of the second binder in pts. wt. when other solid content is 100 pts. wt.