▎ 摘　　要

NOVELTY - The preparation of a high-performance nickel-aluminum layered double sulfide/oxide composite electrode material involves: dissolving nickel nitrate hexahydrate, aluminum nitrate nonahydrate and urea in deionized water, stirring, transferring the mixed solution into a hydrothermal reaction kettle, and heating to obtain nickel-aluminum layered double hydroxide (Ni-Al LDH); mixing and grinding NiAl LDH and sodium thiosulfate, transferring the mixed powder to a tube furnace, and annealing to obtain NiAl layered double oxide/sulfide (LDO/LDS); and assembling the asymmetric NiAl LDS/LDO/graphene supercapacitor device by adopting a NiAl LDS/LDO composite material as a positive electrode material and high-purity graphene as a negative electrode material. USE - Preparation method of high performance nickel-aluminum layered double sulfide/oxide composite electrode material used as positive electrode in asymmetric NiAl LDS/LDO/graphene supercapacitor device such as lead-acid battery and lithium ion battery. ADVANTAGE - The three-dimensional nanostructured NiAl LDH base material has a higher specific surface area and can provide more electroactive sites for charge storage. The nickel aluminum double hydroxide is converted into disulfide/oxide, and the conductivity of the material is greatly improved, which is more conducive to the rapid transfer of internal charge of the material. DESCRIPTION OF DRAWING(S) - The drawing shows an X-ray diffraction pattern of the high-performance nickel-aluminum layered double sulfide/oxide composite electrode material.