Solid electrolyte material and battery
Provided is a solid electrolyte material represented by a composition formula Li 3−3δ Y 1+δ−a M a Cl 6−x−y Br x I y , where M is at least one element selected from the group consisting of Al, Sc, Ga, and Bi; −1<δ<1; 0<a<2; 0<(1+δ−a); 0≤x≤6; 0≤y≤6; and (x+y)≤6.
1. A solid electrolyte material represented by a composition formula Li 3−3δ Y 1+δ−a M a Cl 6−x−y Br x I y ,
where
M is at least one element selected from the group consisting of Al, Sc, Ga, and Bi;
−1<δ<1;
0<a<2;
0<(1+δ−a);
0≤x≤6;
0≤y≤6; and
(x+y)<6, and
wherein an ion conductivity of the solid electrolyte material is not less than 1×10 −5 S/cm and not more than 3.0×10 −3 S/cm at room temperature.
2. The solid electrolyte material according to claim 1 , wherein
0.025≤a≤0.99 is satisfied.
3. The solid electrolyte material according to claim 2 , wherein
0.035≤a≤0.1 is satisfied.
4. The solid electrolyte material according to claim 1 , wherein
−0.5≤δ≤0.5 is satisfied.
5. The solid electrolyte material according to claim 4 , wherein
−0.3≤δ≤0.2 is satisfied.
6. A battery, comprising:
the solid electrolyte material according to claim 1 ;
a positive electrode;
a negative electrode; and
an electrolyte layer provided between the positive electrode and the negative electrode,
wherein
at least one selected from the group consisting of the positive electrode, the negative electrode, and the electrolyte layer includes the solid electrolyte material.
7. The solid electrolyte material according to claim 1 , wherein
M is at least one element selected from the group consisting of Al, Ga, and Bi.
8. The solid electrolyte material according to claim 1 , wherein
0<x≤6; and 0<y≤6.
9. A solid electrolyte material represented by a composition formula Li 3−3δ Y 1+δ−a M a Cl 6−x−y Br x I y ,
where
M is at least one element selected from the group consisting of Al, Ga, and Bi;
−1<δ<1;
0<a<2;
0<(1+δ−a);
0≤x≤6;
0≤y≤6; and
(x+y)≤6.
10. The solid electrolyte material according to claim 9 , wherein
0.025≤a≤0.99 is satisfied.
11. The solid electrolyte material according to claim 10 , wherein
0.035≤a≤0.1 is satisfied.
12. The solid electrolyte material according to claim 9 , wherein
−0.5≤δ≤0.5 is satisfied.
13. The solid electrolyte material according to claim 12 , wherein
−0.3≤δ≤0.2 is satisfied.
14. A battery, comprising:
the solid electrolyte material according to claim 9 ;
a positive electrode;
a negative electrode; and
an electrolyte layer provided between the positive electrode and the negative electrode,
wherein
at least one selected from the group consisting of the positive electrode, the negative electrode, and the electrolyte layer includes the solid electrolyte material.
15. The solid electrolyte material according to claim 9 , wherein
0<x≤6; and 0<y≤6.