Abstract

Trivalent cation conducting solid electrolytes with NASICON type structure, R 1/3Zr 2(PO 4) 3 (R=Rare Earths), were synthesized by a ball milling method and trivalent R 3+ cation conducting properties were investigated. The trivalent ion conductivity of R 1/3Zr 2(PO 4) 3 was enhanced ca. three times compared to the samples prepared by a conventional sol–gel method due to the improvement of the crystallinity of the solids. The macroscopic Sc 3+ cation conducting behavior in Sc 1/3Zr 2(PO 4) 3, which shows the highest trivalent ion conductivity in R 1/3Zr 2(PO 4) 3 series, was directly demonstrated by a dc electrolysis method.

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