ALL-SOLID-STATE LITHIUM BATTERY

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Disclosed is an all-solid-state lithium battery having excellent output properties. The battery comprises a positive electrode, an electrolyte layer and a negative electrode, wherein the positive electrode comprises a positive electrode active material represented by formula (1) and a sulfide-type solid electrolyte and the electrolyte layer comprises a sulfide-type solid electrolyte. LiaNibCocMndMeOf+σ (1) [In the formula, 1.01 ≤ a ≤ 1.05; f : 2 or 4; σ : -0.2 to 0.2 inclusive; M : Mg, Ca, Y, a rare earth element, or the like; 0 ≤ b ≤ 1, 0 ≤ c ≤ 1, 0 ≤ d ≤ 1, 0 ≤ e ≤ 0.5, and b+c+d+e = 1 when f = 2; and 0 ≤ b ≤ 2, 0 ≤ c ≤ 2, 0 ≤ d ≤ 2, 0 ≤ e ≤ 1, and b+c+d+e = 2 when f = 4.]