Insights into Crystal Structure and Diffusion of Biphasic Na₂Zn₂TeO₆.

ABSTRACT: The layered oxide Na₂Zn₂TeO₆ is a fast Na⁺ ion conductor and a suitable candidate for application as a solid-state electrolyte. We present a detailed study on how synthesis temperature and Na-content affect the crystal structure and thus the Na⁺ ion conductivity of Na₂Zn₂TeO₆. Furthermore, we report for the first time an O'3-type phase for Na₂Zn₂TeO₆. At a synthesis temperature of 900 °C, we obtain a pure P2-type phase, providing peak performance in Na⁺ ion conductivity. Synthesis temperatures lower than 900 °C produce a series of mixed P2 and O'3-type phases. The O'3 structure can only be obtained as a pure phase by substituting Li on the Zn-sites to increase

SUBMITTER: Li X 

PROVIDER: S-EPMC7467548 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature