▎ 摘　　要

NOVELTY - Positive electrode material comprises a first shell layer, a second shell layer and a core layer. The second shell layer is set between the first shell layer and the core layer. The core layer comprises lithium sulfide. The second shell layer comprises molybdenum atom or molybdenum -containing compound. The first shell layer comprises carbon material. The second shell layer and the core layer form a porous structure. The porosity of the porous structure is 1-30%. USE - Positive electrode material used in positive electrode sheet of a lithium battery for power using device (all claimed). ADVANTAGE - The core-shell nanostructure effectively inhibits the outflow of lithium polysulfides and maintains its structural stability, and the strong interactions between lithium sulfide and graphene and lithium sulfide and molybdenum ensure effective chemical absorption, further inhibiting the role of lithium polysulfides in nanomaterials. The domain confinement of lithium polysulfides effectively inhibits the shuttling behavior of polysulfides, enhancing the cycling performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. a method for preparing positive electrode material, which involves sintering the molybdenum -based organometallic framework material, lithium source and carbon disulfide; 2. a positive electrode sheet, which comprises positive electrode material; 3. a lithium battery, which comprises positive electrode sheet; and 4. a power using device, which comprises lithium battery.