New P2-Type Honeycomb-Layered Sodium-Ion Conductor: Na2Mg2TeO6

Yuyu Li; Zhi Deng; Jian Peng; Jintao Gu; Enyi Chen; Yao Yu; Jianfang Wu; Xiang Li; Jiahuan Luo; Yangyang Huang; Yue Xu; Zhonghui Gao; Chun Fang; Jinlong Zhu; Qing Li; Jiantao Han; Yunhui Huang

doi:10.1021/acsami.8b03938

New P2-Type Honeycomb-Layered Sodium-Ion Conductor: Na₂Mg₂TeO₆

ACS Appl Mater Interfaces. 2018 May 9;10(18):15760-15766. doi: 10.1021/acsami.8b03938. Epub 2018 Apr 30.

Authors

Yuyu Li¹, Zhi Deng¹, Jian Peng¹, Jintao Gu¹, Enyi Chen¹, Yao Yu¹, Jianfang Wu¹, Xiang Li¹, Jiahuan Luo¹, Yangyang Huang¹, Yue Xu¹, Zhonghui Gao², Chun Fang¹, Jinlong Zhu³, Qing Li¹, Jiantao Han¹, Yunhui Huang¹

Affiliations

¹ State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering , Huazhong University of Science and Technology , Wuhan , Hubei 430074 , China.
² School of Materials Science and Engineering , Tongji University , Shanghai 201804 , China.
³ Center for High Pressure Science & Technology Advanced Research , Beijing 100094 , China.

PMID: 29687995
DOI: 10.1021/acsami.8b03938

Abstract

A novel solid sodium-ion conductor, Na₂Mg₂TeO₆ (NMTO) with a P2-type honeycomb-layered structure, has been synthesized for the first time by a simple solid-state synthetic route. The conductor of NMTO exhibits high conductivity of 2.3 × 10^-4 S cm^-1 at room temperature (RT) and a large electrochemical window of ∼4.2 V (versus Na⁺/Na). The conductor is remarkably stable, both in the ambient environment and within its metallic Na anode. This facile sodium-ion conductor displays potential for use in all-solid-state sodium-ion batteries (SS-SIBs).

Keywords: Na2Mg2TeO6; P2-type; all-solid-state batteries; layered; sodium-ion conductor.