Li-Ion Conduction and Stability of Perovskite Li3/8Sr7/16Hf1/4Ta3/4O3

Bing Huang; Biyi Xu; Yutao Li; Weidong Zhou; Ya You; Shengwen Zhong; Chang-An Wang; John B Goodenough

doi:10.1021/acsami.6b03070

Li-Ion Conduction and Stability of Perovskite Li3/8Sr7/16Hf1/4Ta3/4O3

ACS Appl Mater Interfaces. 2016 Jun 15;8(23):14552-7. doi: 10.1021/acsami.6b03070. Epub 2016 Jun 1.

Authors

Bing Huang^{1

2}, Biyi Xu³, Yutao Li⁴, Weidong Zhou⁴, Ya You⁴, Shengwen Zhong^{2

4}, Chang-An Wang¹, John B Goodenough⁴

Affiliations

¹ State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , Beijing 100084, P.R. China.
² School of Material Science and Engineering, Jiangxi University of Science and Technology , Ganzhou 341000, Jiangxi, P.R. China.
³ State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University , Shanghai 200240, P.R. China.
⁴ Materials Research Program and the Texas Materials Institute, ETC9.184, University of Texas at Austin , Austin, Texas 78712, United States.

PMID: 27215282
DOI: 10.1021/acsami.6b03070

Abstract

A solid Li-ion conductor with a high room temperature Li-ion conductivity and small interfacial resistance is required for its application in next-generation Li-ion batteries. Here, we prepared a cubic perovskite-related oxide with the general formula Li3/8Sr7/16Hf1/4Ta3/4O3 (LSHT) by a conventional solid-state reaction method, which was studied by X-ray diffraction, electrochemical impedance spectroscopy, and (7)Li MAS NMR. Li3/8Sr7/16Hf1/4Ta3/4O3 has a high Li-ion conductivity of 3.8 × 10(-4) S cm(-1) at 25 °C and a low activation energy of 0.36 eV in the temperature range 298-430 K. It exhibits both high stability and small interfacial resistance with commercial organic liquid electrolytes, which makes it promising as a separator in Li-ion batteries.

Keywords: Li-ion batteries; Li-ion conductor; interfacial resistance; perovskite; solid oxide electrolyte.