▎ 摘　　要

NOVELTY - Preparing self-supporting positive electrode involves mixing and stirring a graphene oxide aqueous dispersion, MXene aqueous dispersion, a sulfur source and hydrochloric acid, carrying out primary hydrothermal reaction to obtain reduced graphene oxide/MXene-sulfur composite hydrogel, slicing and immersing the hydrogel in a mixed aqueous dispersion of graphene oxide aqueous dispersion and MXene aqueous dispersion for secondary hydrothermal reaction, freeze-drying and tableting to obtain reduced graphene oxide/MXene-sulfur-doped reduced graphene oxide/MXene composite electrode. USE - The method is useful for preparing self-supporting positive electrode for coated structure lithium-sulfur battery (claimed). ADVANTAGE - The method enables simple preparation of the self-supporting positive electrode with high electrochemical performance. The positive electrode greatly improves the energy density of battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for use of the self-supporting positive electrode for coated structure lithium-sulfur battery.