Stable cycling of Na metal anodes in a carbonate electrolyte

Shiyang Wang; Wenbin Cai; Zhihao Sun; Fanyang Huang; Yulin Jie; Yang Liu; Yawei Chen; Bo Peng; Ruiguo Cao; Genqiang Zhang; Shuhong Jiao

doi:10.1039/C9CC07419H

Stable cycling of Na metal anodes in a carbonate electrolyte†

Shiyang Wang,^a Wenbin Cai,^a Zhihao Sun,^a Fanyang Huang,^a Yulin Jie,^a Yang Liu,^a Yawei Chen,^a Bo Peng,^a Ruiguo Cao,

^a Genqiang Zhang

^a and Shuhong Jiao

*^a

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* Corresponding authors

^a Hefei National Laboratory for Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
E-mail: jiaosh@ustc.edu.cn

Abstract

It is significantly challenging to stabilize sodium metal anodes in carbonate electrolytes. Here, we report that a sodium metal anode can achieve a high coulombic efficiency of up to ∼97% over 400 cycles at 0.1 mA cm⁻² in a carbonate electrolyte with NaAsF₆ as an additive. It is revealed that the SEI layer contains a large amount of NaF and O–As–O polymer which enables the stable cycling of sodium metal anodes.

Chemical Communications

Stable cycling of Na metal anodes in a carbonate electrolyte†

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Stable cycling of Na metal anodes in a carbonate electrolyte

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