▎ 摘　　要

NOVELTY - A semi-solid lithium sulfur battery comprises sulfur-carbon positive electrode, composite solid negative electrode, electrolyte, separator. The composite solid-state negative electrode comprises collector layer, a negative electrode active material, electronically conductive particles, binder and continuous solid electrolyte layer. The solid electrolyte layer is uniformly and compactly coated on the surface and/or the containing hole of the negative electrode active substance of the electronic conductive particles to form a continuous electronic transmission channel. The electrolyte comprises one or the combination of more than two of polyionic liquid-based solid electrolyte, polyionic liquid copolymer electrolyte and poly single ion transmission solid electrolyte. The polyionic liquid copolymer electrolyte obtained by in-situ polymerization of an ionic liquid monomer with at least one reactive group and a polymer monomer with at least one reactive group. USE - Semi-solid lithium sulfur battery. ADVANTAGE - The battery uses sulfur carbon positive electrode comprising a surface modified layer of negative electrode material and the liquid electrolyte solution, the liquid electrolyte and the electrode are completely separated, so that the side reaction between the electrolyte and the electrode in the electrochemical process can be completely prevented, the influence of the room-temperature ionic conductivity of the solid electrolyte on the battery can be reduced, and the safety performance and the long cycle performance of the battery can be effectively improved. DETAILED DESCRIPTION - A semi-solid lithium sulfur battery comprises sulfur-carbon positive electrode, composite solid negative electrode, electrolyte, separator that may or may not be included between the sulfur-carbon positive electrode. The composite solid-state negative electrode comprises collector layer, a negative electrode active material, electronically conductive particles, binder and continuous solid electrolyte layer. The solid electrolyte layer is uniformly and compactly coated on the surface and/or the containing hole of the negative electrode active substance of the electronic conductive particles to form a continuous electronic transmission channel, and the negative electrode active material is not in contact with the electrolyte. The electrolyte for forming the solid electrolyte layer comprises one or the combination of more than two of polyionic liquid-based solid electrolyte, polyionic liquid copolymer electrolyte and polyionic transmission solid electrolyte. The polyionic liquid copolymer electrolyte obtained by in-situ polymerization of an ionic liquid monomer with at least one reactive group and a polymer monomer with at least one reactive group. An INDEPENDENT CLAIM is included for preparation of semi-solid lithium sulfur battery, which involves providing a porous electrode comprising a current collector layer, negative active material particles, electron conductive particles, and a binder, having electron channels between the negative active material particles and the current collector layer, providing a solid electrolyte precursor solution containing a mixture of a solid electrolyte precursor, a lithium salt and an initiator, applying the solid electrolyte precursor solution to the surface of the porous electrode for surface modification, heating or illumination processing, promoting the solid electrolyte layer precursor to disperse on the porous electrode surface and penetrating into the porous electrode, forming a solid electrolyte layer on the porous electrode surface and inside after the in-situ reaction aggregate to obtain composite solid-state negative electrode or directly applying the mixed solution containing electrolyte and lithium salt to the surface of the porous electrode, dispersing the electrolyte on the surface of the porous electrode and penetrating into the porous electrode, removing the solvent to form a solid electrolyte layer, and obtaining composite solid negative electrode, assembling a sulfur-carbon anode, optionally adding separator and sulfur carbon positive electrode, and injecting electrolyte.