ELECTRODE ACTIVE MATERIAL LAYER AND BATTERY

The present disclosure provides an electrode active material layer that can improve battery capacity retention, as well as a battery comprising the electrode active material layer, whereby the capacity retention is improved. The electrode active material layer of the disclosure comprises an electrode active material and a sulfide solid electrolyte. In the electrode active material layer of the present disclosure, the peak intensity in the spectrum obtained by XPS measurement satisfies the following relational expression (1): The battery of the disclosure comprises an electrode active material layer.