New trivalent rare earth ion (La, Nd, Gd) conducting solid electrolytes
New trivalent rare earth ion (La, Nd, Gd) conducting solid electrolytes
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DOI：
10.1016/j.jallcom.2004.12.064
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发表时间：
2006-02
影响因子：
6.2
通讯作者：
Y. Hasegawa;N. Imanaka
中科院分区：
文献类型：
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作者：
Y. Hasegawa;N. Imanaka
制备了基于NASICON型结构的新型三价稀土离子导电（RxZr 1 −x）4/（4−x）Nb（PO 4）3（R：La，Nd，Gd）固体电解质，其具有适合R3+离子导电的三维网络结构，并研究了其在固体中的离子导电性能。根据移动的离子尺寸与晶格体积之间的关系确定了R3+离子在固体中传导的最佳传导路径尺寸。稀土磷酸盐的典型离子电导率在600°C时约为10−4Scm− 1，在（RxZr 1 −x）4/（4−x）Nb（PO 4）3磷酸盐系列中，当R=Nd时，离子电导率最高。通过在不同氧分压下的交流电导率测量以及通过直流电解，确定（NdxZr 1 −x）4/（4−x）Nb（PO 4）3固体电解质中的导电物种为三价Nd 3+离子。
New trivalent rare earth ion conducting (RxZr1−x)4/(4−x)Nb(PO4)3(R: La, Nd, Gd) solid electrolytes based on the NASICON type structure, which have a three-dimensional network structure suitable for the R3+ion conduction, were prepared and their ion conducting properties in their solids were investigated. The most suitable conducting path size for the R3+ion conduction in the solids was identified from the relationship between the mobile ion size and the lattice volume. The typical ion conductivity of the rare earth phosphates was found to be in the order of 10−4Scm−1at 600°C and the highest ion conductivity among the (RxZr1−x)4/(4−x)Nb(PO4)3phosphate series was obtained for R=Nd. The conducting species in the (NdxZr1−x)4/(4−x)Nb(PO4)3solid electrolyte was identified to be the trivalent Nd3+ion by the AC conductivity measurements in various oxygen partial pressures and also by the DC electrolysis.