COMPOSITION, MIXTURE FOR ELECTROCHEMICAL DEVICE, MIXTURE SHEET FOR ELECTROCHEMICAL DEVICE, ELECTROCHEMICAL DEVICE, AND METHOD FOR MANUFACTURING MIXTURE SHEET FOR ELECTROCHEMICAL DEVICE

The disclosure aims to provide a composition capable of reducing the resistance of an electrochemical device containing a sulfide solid electrolyte, a mixture for an electrochemical device, a mixture sheet for an electrochemical device, an electrochemical device, and a method for producing a mixture sheet for an electrochemical device. Provided is a composition containing: a sulfide solid electrolyte; a fluoropolyether; and a fibrillatable resin.