Electrode active material layer, solid-state battery, and production method for electrode active material layer

Abstract

An electrode active material layer in the present disclosure contains an electrode active material and a binder, and the ratio of a binder area fraction of a solid electrolyte layer side to a binder area fraction of a current collector side is 55 area % or more. A solid-state battery in the present disclosure includes a current collector, the electrode active material layer in the present disclosure, and a solid electrolyte layer, in this order. A method in the present disclosure for producing the electrode active material layer includes (a) providing an electrode composite material slurry containing the binder and others, (b) forming a preparatory electrode active material layer by coating the current collector with the slurry, (c) drying the preparatory electrode active material layer at a temperature lower than 100° C., and (d) further drying the dried preparatory electrode active material layer at a temperature of 140° C. or higher.

Dependencies are inferred from the claim text.