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) and Formula (2), R11 to R27 each independently represent a hydrogen atom, an alkyl group, or an aryl group, L11 represents a divalent organic group that may have a substituent, L12 represents a single bond or a divalent organic group that may have a substituent, and A represents a functional group selected from the group of functional groups.

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 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 binder (B), and
• 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) and Formula (2), R11 to R27 each independently represent a hydrogen atom, an alkyl group, or an aryl group, L11 represents a divalent organic group that may have a substituent, L12 represents a single bond or a divalent organic group that may have a substituent, and A represents a functional group selected from the group of functional groups.