On the origin of high ionic conductivity in Na-doped SrSiO₃.

ABSTRACT: Understanding the local structure and ion dynamics is at the heart of ion conductor research. This paper reports on high-resolution solid-state ²⁹Si, ²³Na, and ¹⁷O NMR investigation of the structure, chemical composition, and ion dynamics of a newly discovered fast ion conductor, Na-doped SrSiO₃, which exhibited a much higher ionic conductivity than most of current oxide ion conductors. Quantitative analyses reveal that with a small dose (<10 mol%) of Na, the doped Na integrates into the SrSiO₃ structure to form Na _x Sr_1-x SiO_3-0.5x , and with >10 mol% Na doping, phase separation occurs, leading to the formation of an amorphous phase β-Na₂Si₂O₅ and a

SUBMITTER: Chien PH 

PROVIDER: S-EPMC6008723 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature