ELECTROCHEMICAL PREPARATION METHOD FOR PEROVSKITE-TYPE SOLID ELECTROLYTE LITHIUM-LANTHANUM-TITANIUM OXIDE COMPOUND

摘要

An electrochemical preparation method for a perovskite-type solid electrolyte lithium-lanthanum-titanium oxide compound. The electrochemical preparation method comprises: preparing a mixture of lanthanum oxide and titanium dioxide according to the lanthanum-to-titanium ratio; embedding the titanium dioxide into lithium ions by using an electrochemical method; and then annealing the lithium ions to obtain a high-purity LLTO. The preparation method can control the lithium-lanthanum-titanium ratio accurately, thereby resolving the problem of low purity of products due to general volatilization of lithium salt in a solid-phase method at a high temperature. In addition, the raw materials are cheap, the process is simple, and the high-purity lithium-lanthanum-titanium oxide compound can be obtained through two steps of electrochemical and high-temperature treatment.