ALL-SOLID-STATE LITHIUM SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME

摘要

An all-solid-state lithium secondary battery includes a positive electrode; a negative electrode; and a solid electrolyte arranged between the positive and negative electrodes, to conduct lithium ions. In the all-solid-state lithium secondary battery, a mixed layer is in close contact with a surface of the solid electrolyte adjacent to the positive electrode, the mixed layer containing the positive-electrode active material and (Lix(1−α), Mxα/β)γ+(B1−y, Ay)z+O2−δ (wherein in the formula, M and A each represent at least one or more elements selected from C, Al, Si, Ga, Ge, In, and Sn, α satisfies 0≦α<1, β represents the valence of M, γ represents the average valence of (Li+x(1−α), Mα), y satisfies 0≦y<1, z represents the average valence of (B1−y, Ay) and x, α, β, γ, z, and γ satisfy the relational expression (x(1−α)+xα/β)γ+z=2δ) serving as a matrix.

主权项

1. An all-solid-state lithium secondary battery comprising:
a positive electrode containing a positive-electrode active material; a negative electrode containing a negative-electrode active material; and a solid electrolyte arranged between the positive electrode and the negative electrode, the solid electrolyte conducting lithium ions, wherein a mixed layer is in close contact with a surface of the solid electrolyte adjacent to the positive electrode, the mixed layer containing the positive-electrode active material and (Lix(1−α), Mxα/β)γ+(B1−y, Ay)z+O2−δ (wherein in the formula, M and A each represent at least one or more elements selected from C, Al, Si, Ga, Ge, In, and Sn, α satisfies 0≦α<1, β represents the valence of M, γ represents the average valence of (Lix(1−α), Mxα/β), y satisfies 0≦y<1, z represents the average valence of (B1−y, Ay), and x, α, β, γ, z, and δ satisfy the relational expression (x(1−α)+xα/β)γ+z=2δ) serving as a matrix.