Ca-doped Na2Zn2TeO6 layered sodium conductor for all-solid-state sodium-ion batteries. (1st March 2019)

• Record Type: Journal Article
• Authors: Deng, Zhi; Gu, Jintao; Li, Yuyu; Li, Shuai; Peng, Jian; Li, Xiang; Luo, Jiahuan; Huang, Yangyang; Fang, Chun; Li, Qing; Han, Jiantao; Huang, Yunhui; Zhao, Yusheng
• Is Part Of: Electrochimica acta. Volume 298(2019)
• Page Start: 121
• Page End: 126
• Publication Date: 2019-03-01
• Subjects: Na2Zn2TeO6 -- Ca-doped -- Sodium conductor -- All-solid-state batteries; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.12.092
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Na2 Zn2 TeO6 is a potential sodium solid electrolyte of all-solid-state sodium-ion batteries. In this work, Na + ion conductivity and electrochemical performance of layered Ca-doped Na2 Zn2- x Ca x TeO6 ( x = 0–0.05) (NZTO-C x ) electrolytes have been investigated. The highest conductivity has been achieved 7.54 × 10 −4 S cm −1 in NZTO-Cx at x = 0.02, at room temperature due to grain-boundary modification and interlayer-interface elimination. Meanwhile, chemical stability with metallic Na anode and electrochemical window of NZTO-C x are improved by Ca doping. Furthermore, the cycle stability of Na3 V2 (PO4 )3 /NZTO-C x /Na solid-state batteries have been successfully increased by Ca doping. These advantages highly demonstrate good potential application prospect of NZTO-C x in all-solid-state sodium-ion batteries.