Positive electrode material and battery using same

A positive electrode material, comprising:

• a positive electrode active material particle and a first solid electrolyte material particle,
• wherein the positive electrode active material particle and the first solid electrolyte material particle are in contact with each other,
• the first solid electrolyte material particle is represented by the following composition formula:
• LiaMbYcX6,
• M is at least one selected from the group consisting of Mg, Ca, Sr, Ba, Zn, Sc, Al, Ga, Bi, Zr, Hf, Ti, Sn, Ta, and Nb,
• X is at least one selected from the group consisting of Cl, Br, and I,
• a+m′b+3c=6, a>0 and c>0 are satisfied,
• m′ represents a valence of M, and
• the positive electrode active material particle includes a metal oxyfluoride represented by the following composition formula:
• LipMeqOmFn,
• where
• Me is at least one selected from the group consisting of Mn, Co, Ni, Fe, Al, Cu, V, Nb, Mo, Ti, Cr, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, W, B, Si, and P,
• n′ represents a valence of Me,
• 0.5≤p≤1.5,
• 0.5≤q≤1.0
• 1≤m<2;
• p+n′q=2m+n, and
• 0<n≤1.