Highly conducting divalent Mg2+ cation solid electrolytes with well-ordered three-dimensional network structure
Highly conducting divalent Mg2+ cation solid electrolytes with well-ordered three-dimensional network structure
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DOI：
10.1016/j.jssc.2015.12.008
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发表时间：
2016-03
影响因子：
3.3
通讯作者：
S. Tamura;Megumi Yamane;Yasunori Hoshino;N. Imanaka
中科院分区：
文献类型：
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作者：
S. Tamura;Megumi Yamane;Yasunori Hoshino;N. Imanaka
通过在HfNb（PO 4）3固体中的Hf 4+位置上部分取代低价Mg 2+阳离子，首次开发了三维有序NASICON型Mg 2+阳离子导体（MgxHf 1 −x）4/（4−2x）Nb（PO 4）3，以实现即使在中等温度下也具有高Mg 2+阳离子电导率。（Mg 0. 1Hf 0. 9）4/3. 8 Nb（PO 4）3固体由于形成了有序的NASICON型结构，在450 °C以下实现了高的Mg 2+阳离子电导率和低的Mg 2+阳离子迁移活化能。用两种直流电解方法直接定量地研究了NASICON型（Mg_（0.1）Hf_（0.9））_（4/3.8）Nb（PO_（4））_3固体中Mg ~（2+）离子的纯导电性。
A three-dimensionally well-ordered NASICON-type Mg2+cation conductor, (MgxHf1−x)4/(4−2x)Nb(PO4)3, was firstly developed by partial substitution of lower valent Mg2+cation onto the Hf4+sites in a HfNb(PO4)3solid to realize high Mg2+cation conductivity even at moderate temperatures. Due to the formation of well-ordered NASICON-type structure, both the high Mg2+cation conductivity below 450 °C and the low activation energy for Mg2+cation migration was successfully realized for the (Mg0.1Hf0.9)4/3.8Nb(PO4)3solid. Pure Mg2+cation conduction in the NASICON-type (Mg0.1Hf0.9)4/3.8Nb(PO4)3solid was directly and quantitatively demonstrated by means of two kinds of dc electrolysis.