Solid electrolyte composition, solid electrolyte-containing sheet and manufacturing method therefor, all-solid state secondary battery and manufacturing method therefor, and polymer and non-aqueous solvent dispersion thereof

A solid electrolyte-containing sheet comprising:

• 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 binder (B),
• wherein the binder (B) has a segment a having at least one bond selected from a urethane bond, a urea bond, an amide bond, an imide bond, or an ester bond in a main chain and a functional group-containing hydrocarbon polymer segment having at least one selected from the following group of functional groups,
• <group of functional groups>
• a carboxylic acid group, a sulfonic acid group, a phosphoric acid group, a hydroxy group, an amino group, a cyano group, an alkoxysilyl group, an aromatic hydrocarbon ring group, an aromatic heterocyclic group, and an aliphatic hydrocarbon ring group in which three or more rings are fused, and
• wherein the functional group-containing hydrocarbon polymer segment has at least one repeating unit selected from a repeating unit represented by Formula (1) or a repeating unit represented by Formula (2),
• in Formula (1), R11 to R17 each independently represent a hydrogen atom, an alkyl group, or an aryl group, L11 represents a divalent organic group that may have a substituent, and A represents a functional group selected from the group of functional groups,
• in Formula (2), R21 to R27 each independently represent a hydrogen atom, an alkyl group, or an aryl group, and a partial structure -L12-A is represented by Formula (3a) or Formula (4a),
• in Formula (3a) and Formula (4a), X represents —S—, L21 represents a single bond or an alkylene group having 1 to 20 carbon atoms, L22 represents a single bond, an alkylene group having 1 to 20 carbon atoms, or an arylene group having 6 to 20 carbon atoms, Y2 represents a trivalent group made of hydrocarbon, L23 and L24 each independently represent a single bond or an alkylene group having 1 to 20 carbon atoms, A represents a functional group selected from the group of functional groups, and * represents a bonding portion with a C atom in Formula (2).