Acta Phys. -Chim. Sin. ›› 2018, Vol. 34 ›› Issue (2): 213-218.doi: 10.3866/PKU.WHXB201707172

Special Issue: Special Issue for Highly Cited Researchers

• ARTICLE • Previous Articles     Next Articles

An Sodium Bis (trifluoromethanesulfonyl) imide-based Polymer Electrolyte for Solid-State Sodium Batteries

Qiang MA1,2,Yongsheng HU1,*(),Hong LI1,Liquan CHEN1,Xuejie HUANG1,Zhibin ZHOU2,*()   

  1. 1 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
    2 School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
  • Received:2017-06-06 Published:2017-11-13
  • Contact: Yongsheng HU,Zhibin ZHOU;
  • Supported by:
    the National Key Technologies R & D Program, China(2016YFB0901504);the National Natural Science Foundation of China(51421002);the National Natural Science Foundation of China(51472268);the National Natural Science Foundation of China(51172083)


A solid polymer electrolyte (SPE), composed of sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) and poly(ethylene oxide) (PEO), is prepared by a simple solution-casting method. The physicochemical and electrochemical properties of the NaTFSI/PEO ([EO]/[Na+]=15) SPE in terms of its phase transitions, crystallization, thermal stability, ionic conductivity, and anodic electrochemical stability are systematically investigated. We demonstrate that the NaTFSI/PEO SPE has a relatively high ionic conductivity (σ ≈ 10-3 S·cm-1) at 80℃, excellent electrochemical stability (4.86 V vs. Na+/Na), and thermal stability up to 350℃. More importantly, the NaTFSI-based SPE delivers not only excellent chemical and electrochemical stability with sodium metal, but also good cycling and rate performances in an Na|SPE|NaCu1/9Ni2/9Fe1/3Mn1/3O2 cell.

Key words: Sodium bis (trifluoromethanesulfonyl) imide, Solid polymer electrolyte, Poly (ethylene oxide), Sodium battery


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