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A new Na[(FSO2)(n-C4F9SO2)N]-based polymer electrolyte for solid-state sodium batteries

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Abstract

To improve the safety of sodium (Na) batteries, we first report a new solid polymer electrolyte (SPE), composed of sodium (fluorosulfonyl)(n-nonafluorobutanesulfonyl)imide (Na[(FSO2)(n-C4F9SO2)N], NaFNFSI) and poly(ethylene oxide) (PEO), which is prepared by a facile solution-casting method. The NaFNFSI/PEO (EO/Na+ = 15) blended polymer electrolyte exhibits a relatively high ionic conductivity of 3.36 × 10−4 S cm−1 at 80 °C, sufficient thermal stability (>300 °C) and anodic electrochemical stability (≈4.87 V vs. Na+/Na) for application in solid-state Na batteries. Most importantly, the NaFNFSI-based SPE can not only deliver excellent chemical and electrochemical stability with Na metal, but can also display good cycling and current-rate performances for the Na|SPE|NaCu1/9Ni2/9Fe1/3Mn1/3O2 cell. All of these outstanding properties would make the NaFNFSI-based SPE promising as a candidate for application in solid-state Na batteries.

Graphical abstract: A new Na[(FSO2)(n-C4F9SO2)N]-based polymer electrolyte for solid-state sodium batteries

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Publication details

The article was received on 28 Feb 2017, accepted on 28 Mar 2017 and first published on 28 Mar 2017


Article type: Communication
DOI: 10.1039/C7TA01820G
Citation: J. Mater. Chem. A, 2017, Advance Article
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    A new Na[(FSO2)(n-C4F9SO2)N]-based polymer electrolyte for solid-state sodium batteries

    Q. Ma, J. Liu, X. Qi, X. Rong, Y. Shao, W. Feng, J. Nie, Y. Hu, H. Li, X. Huang, L. Chen and Z. Zhou, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA01820G

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