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

An electrode sheet for an all-solid state secondary battery comprising:

• a collector;
• and
• a solid electrolyte layer containing at least one dendritic polymer selected from the group consisting of dendrons, dendrimers, and hyperbranched polymers and at least one of a sulfide-based inorganic solid electrolyte having conductivity of ions of metals belonging to Group I or II of the periodic table and an oxide-based inorganic solid electrolyte having conductivity of ions of metals belonging to Group I or Group II of the periodic table,
• wherein a content of the dendritic polymer is 0.01 to 20 parts by mass with respect to 100 parts by mass of the inorganic solid electrolyte, and
• wherein the dendritic polymer has at least one functional group selected from a group of functional groups (A),
• <Group of functional groups (A)>
• a hydroxy group, a thiol group, a carboxy group, a sulfonic acid group, a phosphoric acid group, an amino group, a cyano group, an isocyanate group, an acid anhydride group, a (meth)acryloyloxy group, an epoxy group, an oxetanyl group, an alkoxide group, a group having a ring structure of three or more rings, an amide group, a urea group, a urethane group, an imide group, and an isocyanurate group.

An electrode sheet for an all-solid state secondary battery comprising:

• a collector;
• and
• an electrode layer containing at least one dendritic polymer selected from the group consisting of dendrons, dendrimers, and hyperbranched polymers, an active material and at least one of a sulfide-based inorganic solid electrolyte having conductivity of ions of metals belonging to Group I or II of the periodic table and an oxide-based inorganic solid electrolyte having conductivity of ions of metals belonging to Group I or Group II of the periodic table,
• wherein a content of the dendritic polymer is 0.01 to 20 parts by mass with respect to 100 parts by mass of the inorganic solid electrolyte, and
• wherein the dendritic polymer has at least one functional group selected from a group of functional groups (A),
• <Group of functional groups (A)>
• a hydroxy group, a thiol group, a carboxy group, a sulfonic acid group, a phosphoric acid group, an amino group, a cyano group, an isocyanate group, an acid anhydride group, a (meth)acryloyloxy group, an epoxy group, an oxetanyl group, an alkoxide group, a group having a ring structure of three or more rings, an amide group, a urea group, a urethane group, an imide group, and an isocyanurate group.

A solid electrolyte sheet comprising:

• at least one dendritic polymer selected from the group consisting of dendrons, dendrimers, and hyperbranched polymers and at least one of a sulfide-based inorganic solid electrolyte having conductivity of ions of metals belonging to Group I or II of the periodic table and an oxide-based inorganic solid electrolyte having conductivity of ions of metals belonging to Group I or Group II of the periodic table,
• wherein a content of the dendritic polymer is 0.01 to 20 parts by mass with respect to 100 parts by mass of the inorganic solid electrolyte, and
• wherein the dendritic polymer has at least one functional group selected from a group of functional groups (II),
• <Group of functional groups (II)>
• a hydroxy group, a thiol group, a carboxy group, a sulfonic acid group, a phosphoric acid group, an amino group, a cyano group, an isocyanate group, an amide group, a urea group, a urethane group, an imide group, and an isocyanurate group.