Highly conducting divalent Mg super(2+) cation solid electrolytes with well-ordered three-dimensional network structure

A three-dimensionally well-ordered NASICON-type Mg super(2+) cation conductor, (Mg sub(x)Hf sub(1-x)) sub(4/(4-2x))Nb (PO sub(4)) sub(3), was firstly developed by partial substitution of lower valent Mg super(2+) cation onto the Hf super(4+) sites in a HfNb(PO sub(4)) sub(3) solid to realize high Mg...

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Bibliographic Details
Published in:Journal of solid state chemistry 2016-03, Vol.235, p.7-11
Main Authors: Tamura, Shinji, Yamane, Megumi, Hoshino, Yasunori, Imanaka, Nobuhito
Format: Article
Language:English
Subjects:
Cations
Conduction
Conductors (devices)
Electrolysis
Migration
Networks
Solid electrolytes
Three dimensional
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Summary:A three-dimensionally well-ordered NASICON-type Mg super(2+) cation conductor, (Mg sub(x)Hf sub(1-x)) sub(4/(4-2x))Nb (PO sub(4)) sub(3), was firstly developed by partial substitution of lower valent Mg super(2+) cation onto the Hf super(4+) sites in a HfNb(PO sub(4)) sub(3) solid to realize high Mg super(2+) cation conductivity even at moderate temperatures. Due to the formation of well-ordered NASICON-type structure, both the high Mg super(2+) cation conductivity below 450 degree C and the low activation energy for Mg super(2+) cation migration was successfully realized for the (Mg sub(0.1)Hf sub(0.9)) sub(4/3.8)Nb(PO sub(4) ) sub(3) solid. Pure Mg super(2+) cation conduction in the NASICON-type (Mg sub(0.1)Hf sub(0.9)) sub(4/3.8)Nb(PO sub(4) ) sub(3) solid was directly and quantitatively demonstrated by means of two kinds of dc electrolysis. Image of the Mg super(2+) cation conduction in NASICON-type (Mg sub(0.1)Hf sub(0.9)) sub(4/3.8)Nb(PO sub(4) ) sub(3) and its Mg super(2+) conductivity.
ISSN:0022-4596
DOI:10.1016/j.jssc.2015.12.008