ION-ELECTRON MIXED CONDUCTOR CERAMIC AND SOLID-STATE ELECTROLYTE, PREPARATION METHODS THEREFOR, AND BATTERY

An ion-electron mixed conductor ceramic comprises Ag-modified LLZTO ceramic; a preparation method of the ion-electron mixed conductor ceramic includes the following steps: adding LLZTO ceramic into a solution containing a soluble silver salt and a reducing agent to obtain silver oxide, and reacting the silver oxide under the action of the reducing agent to prepare the Ag-modified LLZTO ceramic; a composite solid electrolyte comprises the aforementioned ion-electron mixed conductor ceramic, a lithium salt and a polymer; a battery electrode material comprises the aforementioned ion-electron mixed conductor ceramic; a battery comprises the aforementioned ion-electron mixed conductor ceramic or the aforementioned solid electrolyte; when the modified ceramic is applied in electrode materials, it can simultaneously play a role in transporting electrons and ions, improve electrode kinetics, and has good application prospects in the battery field.