4 results about "Ionic conductivity" 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.

The invention discloses a composite electrolyte material and a preparation method thereof and belongs to the technical field of lithium secondary ion battery electrolytes. Polymer fibers are prepared by an electrostatic spinning method, then silicon oxide/polymer composite fibers are prepared by a polycondensation method, and the silicon oxide/polymer composite fibers are soaked in an ionic liquid electrolyte for adsorption treatment to obtain the ionic liquid/silicon oxide/polymer fiber composite electrolyte material. A silicon oxide/polymer composite fiber material is used as a skeleton, has high adsorption space and adsorption efficiency, and can absorb a large amount of active ionic liquid components; the ionic liquid containing the lithium salt is used as an active liquid component for loading ionic conduction, has the characteristics of high ionic conductivity, non-volatility, non-flammability, chemical stability and the like, and is applied to a lithium battery system, so safety of the battery is effectively improved; the composite electrolyte material provided by the invention has high ionic conductivity and high thermal decomposition temperature, and meets the normal operation of the lithium secondary battery.