▎ 摘　　要

NOVELTY - A solid electrolyte coating for lithium batteries comprising a first conductive agent, an inorganic solid electrolyte, and a first binder. The first conductive agent includes carbon black, conductive graphite, vapor-grown carbon fibers, carbon nanotubes, and/or graphene. The inorganic solid electrolyte includes lithium lanthanum tantalite, lithium lanthanum niobate, lithium lanthanum stannate, lithium aluminum germanium phosphate, lithium lanthanum titanium oxide, lithium zirconium titanium phosphate, lithium aluminum titanium phosphate, lithium germanium phosphorus sulphide, lithium silicon phosphorus oxide, lithium lanthanum zirconate, lithium lanthanum zirconium tantalate, lithium sulfide-phosphorus pentasulfide system. USE - Solid electrolyte coating for lithium battery used in electric vehicles, consumer electronics and energy storage. Uses include but are not limited to electric bicycles, electric scooters, electric tricycles, electric power tools, hybrid electric automobiles, plug-in hybrid electric vehicles and hydrogen-powered vehicles. ADVANTAGE - The solid electrolyte coating improves the capability of over-charging and over-discharging of the battery lithium reducing the possibility of battery short circuit in the safety test process e.g. battery needling, collision, extrusion and so on to improve the thermal safety of lithium battery. DETAILED DESCRIPTION - A solid electrolyte coating for lithium batteries comprising a first conductive agent, an inorganic solid electrolyte, and a first binder. The first conductive agent includes carbon black, conductive graphite, vapor-grown carbon fibers, carbon nanotubes, and/or graphene. The inorganic solid electrolyte includes lithium lanthanum tantalite, lithium lanthanum niobate, lithium lanthanum stannate, lithium aluminum germanium phosphate, lithium lanthanum titanium oxide, lithium zirconium titanium phosphate, lithium aluminum titanium phosphate, lithium germanium phosphorus sulfide, lithium silicon phosphorus oxide, lithium lanthanum zirconate, lithium lanthanum zirconium tantalate, lithium sulfide-phosphorus pentasulfide system. Here, 0 ≤ x ≤ 2, 0 ≤ y ≤ 2/3, 0 ≤ z ≤ 2, 0 ≤ m ≤ 2, 0 ≤ n ≤ 1, 0 ≤ p ≤ 2, and 0 ≤ q ≤ 1. The inorganic solid electrolyte is in the form of nanomaterials with a particle size Dv50 ranging from 200-2 μm. The first binder includes sodium carboxymethyl cellulose (CMC), styrene-butadiene rubber (SBR), polytetrafluoroethylene (PTFE), or polyvinylidene fluoride (PVDF). The mass percentage of the first conductive agent in the total mass of the solid electrolyte coating is 5-35%. The inorganic solid electrolyte in the total mass of the solid electrolyte coating is 50-80%. The mass percentage of the first binder in the total mass of the solid electrolyte coating is 5-30%. INDEPENDENT CLAIMS are also included for: (1) a cathode; (2) a preparation method of the cathode sheet; and (3) lithium battery. DESCRIPTION OF DRAWING(S) - The drawing shows a section structure schematic cathode of the pole piece. (Drawing includes non-English language text).