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

1. A solid electrolyte composition comprising:

an inorganic solid electrolyte having ion conductivity of a metal belonging to Group 1 or Group 2 in the periodic table; and

a polymer represented by Formula 1,

in the formula, R 1 represents an (m+n)-valent linking group,

A 1 represents an acidic group, a group having a basic nitrogen atom, a urea group, a urethane group, an alkoxysilyl group, an epoxy group, an isocyanate group, or a hydroxyl group, p represents an integer of 1 to 10,

R 2 and R 3 represent a single bond or a linking group,

P C represents a polymer chain that includes a component represented by Formula (4),

m represents an integer of 1 to 8,

n represents an integer of 2 to 9, and

m+n represents an integer of 3 to 10,

in Formula (4), R 11 represents a hydrogen atom or methyl,

B 2 represents a linking group,

R 15 and R 16 represent an alkyl group or an aryl group,

x1, x2, and x3 represent an integer of 0 or more,

a sum of x1, x2, and x3 is an integer of 1 to 100,

y1 represents an integer of 1 to 30, and

Z represents a group represented by Formula (Z), and

in Formula (Z), R 17 and R 18 represent an alkyl group or an aryl group,

R 19 represents an unsubstituted alkyl group having 1 to 4 carbon atoms, and

y2 represents an integer of 1 to 100.

2. The solid electrolyte composition according to claim 1 ,

wherein the component represented by Formula (4) a component derived from a polymerizable compound having one or more ethylenically unsaturated group.

3. The solid electrolyte composition according to claim 1 ,

wherein the polymer chain P C is a polymer chain of a polymerizable compound selected from (meth)acrylic acid, a (meth)acrylic acid ester compound, or a (meth)acrylonitrile compound.

4. The solid electrolyte composition according to claim 1 ,

wherein the polymer is a reactant of a compound represented by Formula 2 and a polymerizable compound forming the polymer chain P C ,

in the formula, R 5 represents an (m+n)-valent linking group,

R 6 represents a single bond or a linking group,

A 2 represents an acidic group, a group having a basic nitrogen atom, a urea group, a urethane group, an alkoxysilyl group, an epoxy group, an isocyanate group, or a hydroxyl group, p represents an integer of 1 to 10,

m represents an integer of 1 to 8,

n represents an integer of 2 to 9, and

m+n represents an integer of 3 to 10.

5. The solid electrolyte composition according to claim 1 ,

wherein the inorganic solid electrolyte is represented by Formula (1),

L a1 M b1 P c1 S d1 A e1   (1)

in the formula, L represents an element selected from Li, Na, or K, M represents an element selected from B, Zn, Sn, Si, Cu, Ga, Sb, Al, or Ge, A represents an element selected from I, Br, Cl, or F, and a1 to e1 represent compositional ratios between the respective elements, and

a1:b1:c1:d1:e1 satisfies 1 to 12:0 to 5:1:2 to 12:0 to 10.

6. The solid electrolyte composition according to claim 1 , further comprising a dispersion medium.

7. The solid electrolyte composition according to claim 6 ,

wherein the dispersion medium is selected from a ketone compound, an aliphatic compound, or an ester compound.

8. The solid electrolyte composition according to claim 1 , further comprising an active material.

9. A sheet for an all-solid state secondary battery, the sheet comprising a layer that is formed of the solid electrolyte composition according to claim 1 .

10. An electrode sheet for an all-solid state secondary battery, the electrode sheet comprising:

an active material layer formed of the solid electrolyte composition according to claim 8 .

11. An all-solid state secondary battery comprising a positive electrode active material layer, a solid electrolyte layer, and a negative electrode active material layer in this order,

wherein at least one of the positive electrode active material layer, the solid electrolyte layer, or the negative electrode active material layer is formed of the solid electrolyte composition according to claim 1 .

12. A method of manufacturing a sheet for an all-solid state secondary battery, the method comprising forming a film using the solid electrolyte composition according to claim 1 .

13. A method of manufacturing an all-solid state secondary battery, the method comprising manufacturing the all-solid state secondary battery through the method according to claim 12 .