All-solid-state lithium battery employing core-shell structure high-nickel positive electrode material and preparation method of all-solid-state lithium battery

The invention relates to an all-solid-state lithium battery employing a core-shell structure high-nickel positive electrode material and a preparation method of the all-solid-state lithium battery. The core-shell structure high-nickel positive electrode material is characterized in that the chemical expression is zLi(NiCoMn)O .(1-z)LiCoO2, wherein x is more than or equal to 0.7 butless than or equal to 1.0, z is more than or equal to 0.7 but less than or equal to 1.0, y is more than or equal to 0 but less than or equal to 0.3, Li(NiCoMn)O is used as a core material, and LiCoO2 is used as a shell material. A positive electrode of the all-solid-state lithium battery is a mixture of the core-shell structure high-nickel positive electrode material and a sulfideelectrolyte, wherein the mass percent of the sulfide electrolyte in the mixture accounts for 5-30%, the electrolyte employs the sulfide electrolyte, and a negative electrode employs lithium alloy. Bythe core-shell structure high-nickel positiv