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 d...

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Published inACS applied materials & interfaces Vol. 8; no. 27; pp. 17233 - 17238
Main Authors Li, Shouding, Guo, Jianghuai, Ye, Zhuo, Zhao, Xin, Wu, Shunqing, Mi, Jin-Xiao, Wang, Cai-Zhuang, Gong, Zhengliang, McDonald, Matthew J, Zhu, Zizhong, Ho, Kai-Ming, Yang, Yong
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 13.07.2016
Subjects
zero-strain
Na2FeSiO4
nanocrystallites
cathode
sodium ion batteries
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Summary: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.
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ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.6b03969