▎ 摘　　要

NOVELTY - Low internal resistance solid-state battery comprises solid electrolyte layer arranged between anode layer and composite cathode layer. The solid electrolyte layer and anode layer are solidified and prepared as a whole. The composite cathode layer includes a cathode layer and buffer layer, which is composed of hard carbon and conductive polymer. The buffer layer and cathode layer are integrally prepared. USE - Used as the low internal resistance solid-state battery. ADVANTAGE - The battery: uses hard carbon and conductive polymer as the buffer layer, which suppresses the issues of pole piece expansion during the charge and discharge process of the cathode and is in good interface contact with the solid electrolyte; improves the stability of interface between solid electrolyte and cathode; and reduces the internal resistance of interface. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the low internal resistance solid-state battery comprising (a) adding anode active material, conductive agent, and adhesive into the solvent, using wet homogenization process, adding anode active material in two batches, stirring at high speed under vacuum to obtain a slurry having a solid content of 65-75%, and viscosity of 6000-12000 mPa.second, and then using a coater for coating the anode slurry on the aluminum foil in an intermittent coating manner to obtain anode sheet, (b) dissolving polymer solid electrolyte in a solvent, then adding plasticizers and filling agent, stirring into a transparent liquid under a vacuum of -0.1 MPa, then using a coater for coating the slurry on anode sheet in an intermittent coating method with a coating thickness of 30-50 mu m, then drying in an oven at 100 degrees C and curing the anode layer together to obtain solid electrolyte layer, (c) adding cathode active material, superconducting carbon black, and sodium hydroxymethyl cellulose to water solvent, then using wet homogenization process, adding cathode active material in two batches, stirring at high speed under vacuum to obtain cathode slurry, and using coater for coating the cathode slurry on the copper foil in an intermittent coating method to obtain cathode sheet, (d) dissolving hard carbon and conductive polymer in carboxymethyl cellulose glue solution, stirring, then using a coater for coating the slurry on cathode sheet in an intermittent coating manner in a coating thickness of 20-30 mu m, and curing the cathode layer by drying in an oven at 60 degrees C to obtain composite cathode layer, (e) soaking the composite cathode layer in lithium salt solution for 1-5 minutes, and drying in an oven, and (f) observing the size of cathode sheet is larger than the anode sheet by 0-2 mm, according to the surface capacity of cathode sheet by 1-1.2 times the surface capacity of anode sheet. DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of the low internal resistance solid-state battery.