Battery

Abstract

This battery comprises a positive electrode layer, a negative electrode layer, and an electrolyte layer positioned between the positive electrode layer and the negative electrode layer. The negative electrode layer includes a negative electrode active substance and a first solid electrolyte. The electrolyte layer includes a second solid electrolyte. The negative electrode active substance includes Li, Ti, and O. The first solid electrolyte contains a crystal phase attributed to monoclinic crystals and includes Li, M1, and X1, where M1 is at least one selected from the group consisting of a metal element other than Li and a metalloid element and X1 is at least one selected from the group consisting of F, Cl, Br, and I. The second solid electrolyte contains a crystal phase attributed to trigonal crystals and includes Li, M2, and X2, where M2 is at least one selected from the group consisting of a metal element other than Li and a metalloid element and X2 is at least one selected from the group consisting of F, Cl, Br, and I.

Claims

[Claim 1] The positive electrode layer, The negative electrode layer, An electrolyte layer located between the positive electrode layer and the negative electrode layer, Equipped with, The negative electrode layer comprises a negative electrode active material and a first solid electrolyte. The electrolyte layer includes a second solid electrolyte, The negative electrode active material is lithium titanium oxide. The first solid electrolyte contains a crystalline phase belonging to monoclinic crystals and is represented by the following compositional formula (1): Li α1 M1 β1 X1 γ1 ・・・Form (1) Here, in the above composition formula (1), M1 is Y, X1 is at least one selected from the group consisting of Cl, Br, and I. α1, β1, and γ1 satisfy 2.5 ≤ α1 ≤ 3.5, 0.5 ≤ β1 ≤ 1.5, and γ1 = 6. The second solid electrolyte contains a crystalline phase belonging to the trigonal crystal system and is represented by the following compositional formula (2): Li α2 M2 β2 X2 γ2 ・・・Form (2) Here, in the above composition formula (2), M2 is Y, Ca, and Gd, X2 is at least one selected from the group consisting of Cl, Br, and I. α², β², and γ² satisfy 2.5 ≤ α² ≤ 3.5, 0.5 ≤ β² ≤ 1.5, and γ² = 6. battery. [Claim 2] The first solid electrolyte is substantially sulfur-free. The battery according to claim 1. [Claim 3] The preceding two solid electrolytes are substantially sulfur-free. The battery according to claim 1 or 2. [Claim 4] X1 includes Br, The battery according to any one of claims 1 to 3. [Claim 5] The first solid electrolyte is Li 3 YBr 6 、 Li 3 YBr 2 Cl 4 、 and Li 3 YBr 2 Cl 2 I 2 and is at least one selected from the group consisting of The battery according to any one of claims 1 to 4. [Claim 6] X2 contains Cl, The battery according to any one of claims 1 to 5. [Claim 7] The second solid electrolyte is Li 2.8 Ca 0.1 Y 0.6 Gd 0.4 Br 2 Cl 4 , The battery according to claim 1. [Claim 8] The negative electrode active material is Li 4 Ti 5 O 12 That is, The battery according to any one of claims 1 to 7. [Claim 9] The positive electrode layer contains lithium nickel-cobalt manganese oxide, The battery according to any one of claims 1 to 8.

Images