%0 Journal Article
%T Synthesis and characterization of divalent ion conductors with NASICON-type structures
%A Nobuhito Imanaka
%A Shinji Tamura
%A Wonrak Lee
%J Journal of Asian Ceramic Societies
%D 2019
%R https://doi.org/10.1080/21870764.2019.1606141
%X ABSTRACT Divalent ion-conducting solid electrolytes with NASICON-type three-dimensional network structures (MxHf1£¿x)4/(4£¿2x)Nb(PO4)3 (M = Ni, Mg, Ca, Sr) were successfully developed by introducing M2+ cations into HfNb(PO4)3 solids. The presence of high-valence cations such as Hf4+, Nb5+, and P5+ in the structures effectively reduced the electrostatic interaction between the conducting M2+ cations and the surrounding oxide anions, enabling the M2+ cations to migrate smoothly in the rigid crystal lattice. The relationship between the cation conductivity in NASICON-type solids and the ionic radius of the migrating divalent cation species was also clarified by taking into account the relative sizes of the conduction pathways in the structures
%U https://www.tandfonline.com/doi/full/10.1080/21870764.2019.1606141