| abstract |
A battery 2000 according to the present disclosure comprises a positive electrode 201, a negative electrode 203, and an electrolyte layer 202 that is located between the positive electrode 201 and the negative electrode 203. The positive electrode 201 includes a positive electrode material 1000. The positive electrode material 1000 includes a positive electrode active material 110 and a first solid electrolyte material 111. The positive electrode active material 110 contains oxides comprising Li, Ni, Mn, and O. The first solid electrolyte material 111 contains Li, at least one element selected from the group consisting of metal elements other than Li and metalloid elements, and at least one element selected from the group consisting of F, Cl, and Br. The negative electrode 203 contains Bi as a principal component of a negative electrode active material. |