Solid electrolyte composition, solid electrolyte-containing sheet, all-solid state secondary battery, methods for manufacturing solid electrolyte-containing sheet and all-solid state secondary battery, segmented polymer, and non-aqueous solvent dispersion of polymer and segmented polymer

A solid electrolyte-containing sheet comprising:

• a layer containing an inorganic solid electrolyte (A) having a conductivity of an ion of a metal belonging to Group I or II of the periodic table and a polymer (B),
• wherein the polymer (B) has a hydrocarbon polymer segment in a main chain and includes at least one bond selected from the following group of bonds (I) in the main chain,
• <group of bonds (I)>
• an ester bond, an amide bond, an urethane bond, an urea bond, an imide bond, an ether bond, and a carbonate bond.

An all-solid state secondary battery comprising:

• a positive electrode active material layer;
• a negative electrode active material layer;
• and
• a solid electrolyte layer,
• wherein at least one layer of the positive electrode active material layer, the negative electrode active material layer, or the solid electrolyte layer contains an inorganic solid electrolyte (A) having a conductivity of an ion of a metal belonging to Group I or II of the periodic table and a polymer (B), and the polymer (B) has a hydrocarbon polymer segment in a main chain and includes at least one bond selected from the following group of bonds (I) in the main chain,
• <group of bonds (I)>
• an ester bond, an amide bond, an urethane bond, an urea bond, an imide bond, an ether bond, and a carbonate bond.