1 results about "Interfacial impedance" patented technology

The invention provides a battery positive electrode composite pole piece, a preparation method thereof and a solid-state battery comprising the battery positive electrode composite pole piece. The battery positive electrode composite pole piece comprises an aluminum layer, and a composite active substance layer, a solid-state electrolyte layer and a polymer lithium salt layer which are sequentially laminated from two opposite surfaces of the aluminum layer. The preparation method comprises the following steps: coating two sides of an aluminum layer with composite active substance slurry, then continuously coating the surface of the composite active substance layer with solid electrolyte slurry, and coating the surface of the solid electrolyte layer with polymer lithium salt slurry to obtain the battery positive electrode composite pole piece. According to the battery positive electrode composite pole piece disclosed by the invention, the polymer lithium salt layer is in close contact with the negative electrode pole piece, and the high ionic conductivity brought by the solid electrolyte layer is utilized, so the interface impedance can be effectively reduced, and the solid-state battery performance is improved.