SOLID ELECTROLYTE, ELECTRODE, POWER STORAGE ELEMENT, AND METHOD FOR PRODUCING SOLID ELECTROLYTE

A solid electrolyte (10) of the present disclosure includes: a porous dielectric (11) having a plurality of pores (12) interconnected mutually; and an electrolyte (13) including a metal salt and at least one selected from the group consisting of an ionic compound and a bipolar compound and at least partially filling an interior of the plurality of pores (12). Inner surfaces of the plurality of pores (12) of the porous dielectric (11) are at least partially modified by a functional group containing a halogen atom.