Zero-Strain Na2FeSiO4 as Novel Cathode Material for Sodium-Ion Batteries

Shouding Li; Jianghuai Guo; Zhuo Ye; Xin Zhao; Shunqing Wu; Jin-Xiao Mi; Cai-Zhuang Wang; Zhengliang Gong; Matthew J McDonald; Zizhong Zhu; Kai-Ming Ho; Yong Yang

doi:10.1021/acsami.6b03969

Zero-Strain Na2FeSiO4 as Novel Cathode Material for Sodium-Ion Batteries

ACS Appl Mater Interfaces. 2016 Jul 13;8(27):17233-8. doi: 10.1021/acsami.6b03969. Epub 2016 Jun 28.

Authors

Shouding Li, Jianghuai Guo, Zhuo Ye¹, Xin Zhao¹, Shunqing Wu, Jin-Xiao Mi, Cai-Zhuang Wang¹, Zhengliang Gong, Matthew J McDonald, Zizhong Zhu, Kai-Ming Ho^{1

2}, Yong Yang

Affiliations

¹ Ames Laboratory-US DOE and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States.
² International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China , Hefei, Anhui 230026, China.

PMID: 27305627
DOI: 10.1021/acsami.6b03969

Abstract

A new cubic polymorph of sodium iron silicate, Na2FeSiO4, is reported for the first time as a cathode material for Na-ion batteries. It adopts an unprecedented cubic rigid tetrahedral open framework structure, i.e., F4̅3m, leading to a polyanion cathode material without apparent cell volume change during the charge/discharge processes. This cathode shows a reversible capacity of 106 mAh g(-1) and a capacity retention of 96% at 5 mA g(-1) after 20 cycles.

Keywords: Na2FeSiO4; cathode; nanocrystallites; sodium ion batteries; zero-strain.