Solid electrolyte battery and positive electrode active material
View Patent ↗Provided are: a solid electrolyte battery using a novel positive electrode active material that functions in an amorphous state; and a novel positive electrode active material that functions in an amorphous state. The solid electrolyte battery includes: a positive electrode layer including a positive electrode active material layer; a negative electrode layer; and a solid electrolyte layer formed between the positive electrode layer and the negative electrode layer, and the positive electrode active material includes a lithium-boric acid compound in an amorphous state, which contains Li, B, any element M1 selected from Cu, Ni, Co, Mn, Au, Ag, and Pd, and O.
1. A solid electrolyte battery including:
a positive electrode layer including a positive electrode active material layer;
a negative electrode layer; and
a solid electrolyte layer placed between the positive electrode layer and the negative electrode layer,
where the positive electrode active material layer includes a lithium-boric acid compound in an amorphous state, which contains Li, B, and at least two elements M1 and M2 that satisfy M1≠M2 and that are selected from the group consisting of Cu, Mn, Au, Ag, and Pd.
2. The solid electrolyte battery according to claim 1 , wherein the negative electrode layer includes a negative electrode current collector layer, and
a lithium excessive layer is formed by charging at a negative electrode interface of the solid electrolyte layer.
3. The solid electrolyte battery according to claim 1 , wherein the positive electrode layer further includes a positive electrode current collector layer.
4. The solid electrolyte battery according to claim 1 , wherein the negative electrode layer includes a negative electrode active material layer and a negative electrode current collector layer.
5. The solid electrolyte battery according to claim 1 , wherein the positive electrode active material layer is formed from a thin film.
6. The solid electrolyte battery according to claim 1 , the battery further comprising a substrate,
wherein a stacked body including the positive electrode layer, the negative electrode layer, and the solid electrolyte layer is placed on the substrate.
7. The solid electrolyte battery according to claim 6 , wherein the positive electrode layer, the solid electrolyte layer, and the negative electrode layer are formed from thin films.
8. The solid electrolyte battery according to claim 6 , wherein the substrate is a resin substrate.
9. A positive electrode active material comprising:
a lithium-boric acid compound in an amorphous state, which contains Li, B, and at least two elements M1 and M2 that satisfy M1≠M2 and that are selected from the group consisting of Cu, Mn, Au, Ag, and Pd.