The present invention is directed to solid NASICON electrolytes in which the zirconium site is doped with a 2+ oxidation state cation. The present invention is also directed to methods of making the solid electrolytes and methods of using the solid electrolytes in batteries and other electrochemical technologies.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 This invention was made with government support under DEAC0494AL850000 awarded by the Department of Energy. The government has certain rights to this invention.