▎ 摘　　要

NOVELTY - Lithium aluminum alloy, formed by alloying lithium metal and aluminum metal, is claimed. The material ratio of lithium metal and aluminum metal is 0.02:1-10:1. USE - The lithium-aluminum alloy is useful in the preparation of an all-solid-state lithium battery (claimed). ADVANTAGE - The lithium aluminum alloy has high theoretical specific capacity, low electrode working potential, and can achieve-solid battery with high energy density. The method is simple, cost-effective, stable to solid-state electrolyte, solves the problem of instability of the interface between the cathode and the electrolyte of all-solid-state battery, effectively inhibits the generation of byproducts at the interface and the growth of lithium dendrites, and improves the cycle stability of the battery. The cathode has large specific capacity and low electrode potential, which effectively improves the energy density of the lithium battery. In addition, the lithium-aluminum alloy and sulfur electrolyte compatibility is good, cathode solid electrolyte interface stability is good. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparation of lithium aluminum alloy; and (2) all-solid-state lithium battery. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic structural diagram of an all-solid-state battery.