Solid electrolyte composition, solid electrolyte-containing sheet, all-solid state secondary battery, and methods for manufacturing solid electrolyte composition, solid electrolyte-containing sheet, all-solid state secondary battery

A solid electrolyte-containing sheet comprising:

• an inorganic solid electrolyte having a conductivity for ions of metals belonging to Group I or II of the periodic table;
• and
• an anionic polymer which bonds to the inorganic solid electrolyte and has a repeating unit represented by General Formula (2A) or (2B),
• in the formula, R11A and R12A each independently represent a monovalent electron-withdrawing group, R13B represents a monovalent electron-withdrawing group or —R14B—*2, R14B represents a divalent electron-withdrawing group in which a bonding portion with a carbon atom to which R13B and R14B bond withdraws electrons, *2 represents a bonding site, and R11A, R12A, R13B, and R14B may link together to form a ring.

A method for manufacturing a solid electrolyte-containing sheet, the method comprising:

• a step of dispersing an inorganic solid electrolyte having a conductivity for ions of metals belonging to Group I or II of the periodic table in the presence of a dispersion medium so as to produce a slurry;
• a step of applying the obtained slurry onto a base material to form a coating;
• a step of applying a solution of a compound having an anionic polymerizable functional group onto the formed coating and infusing the solution into the coating so as to form a sheet;
• and
• a step of curing the formed sheet through progress of anionic polymerization, by comprising the anionic polymerizable functional group on the surface of the inorganic solid electrolyte, as species initiating the polymerization.