Negative electrode composition, negative electrode, and secondary battery

Abstract

A negative electrode composition that includes a silicon-based active material; and a carbon-based active material, and satisfies both the optimal sphericity ratio represented by Formula (1) and the optimal particle diameter ratio represented by Formula (2): 0 . 7 ≤ X ⁢ 1 / Y ⁢ 1 ≤ 1.5 Formula ⁢ ( 1 ) 0.08 ≤ X ⁢ 2 / Y ⁢ 2 ≤ 0 . 5 Formula ⁢ ( 2 ) where in Formula (1), X1 represents a sphericity of the silicon-based active material, and Y1 represents a sphericity of the carbon-based active material, and in Formula (2), X2 represents an average particle diameter (D50) of the silicon-based active material, and Y2 represents an average particle diameter (D50) of the carbon-based active material.

Dependencies are inferred from the claim text.