Zero-Strain Na2FeSiO4 as Novel Cathode Material for Sodium-Ion Batteries.
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.
Shouding
S
Li
Jianghuai
J
Guo
Ames Laboratory-US DOE and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States.
Zhuo
Z
Ye
Ames Laboratory-US DOE and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States.
Xin
X
Zhao
Shunqing
S
Wu
Jin-Xiao
JX
Mi
Ames Laboratory-US DOE and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States.
Cai-Zhuang
CZ
Wang
Zhengliang
Z
Gong
Matthew J
MJ
McDonald
Zizhong
Z
Zhu
Ames Laboratory-US DOE and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States.|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.
Kai-Ming
KM
Ho
Yong
Y
Yang
Na2FeSiO4; cathode; nanocrystallites; sodium ion batteries; zero-strain