| abstract |
The invention discloses a solid electrolyte, a preparation method thereof and a solid battery containing the solid electrolyte. The solid electrolyte includes a positive electrode interface layer, an intermediate layer and a negative electrode interface layer. The above scheme provided by this application, the multi-layer structure and the gradient design between different layers enable different layers to have different properties and play different roles, reduce the interface impedance, and achieve good contact between the positive and negative electrodes and the electrolyte, so that Solid-state batteries still maintain good performance at room temperature. By adjusting the relative mass ratio of raw materials, the interfacial layer exhibits better viscoelasticity, acting as a "binder" between the intermediate layer and the electrode to provide excellent interfacial contact. At the same time, compared with commonly used binders, the lithium salts, inorganic components and additives in the interface layer can provide a certain ionic conductivity and improve battery performance, while the intermediate layer provides strong mechanical support and excellent ion transport. performance. |