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Issue 14, 2017
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A hybrid polymer/oxide/ionic-liquid solid electrolyte for Na-metal batteries

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Abstract

The development of solid electrolytes with superior electrical and electrochemical performances for the room-temperature operation of sodium (Na)-based batteries is at the infant stage and still remains a challenge. Herein, we, for the first time, report hybrid solid electrolytes consisting of PEO20–NaClO4–5% SiO2x% Emim FSI (x = 50, 70) designed for solid-state Na-metal batteries. The hybrid design yields a solid electrolyte featuring a high room-temperature ionic conductivity of 1.3 × 10−3 S cm−1, suitable mechanical property, a wide voltage stability window of 4.2 V and a high Na+ transference number of 0.61. A prototypical Na-metal battery using this hybrid solid electrolyte demonstrates promising long-term cycling performances at room temperature and at an elevated temperature of 60 °C for 100 cycles. The finding implies that the hybrid solid electrolyte is promising for Na-metal batteries operating at room temperature.

Graphical abstract: A hybrid polymer/oxide/ionic-liquid solid electrolyte for Na-metal batteries

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Publication details

The article was received on 28 Dec 2016, accepted on 15 Feb 2017 and first published on 15 Feb 2017


Article type: Paper
DOI: 10.1039/C6TA11165C
Citation: J. Mater. Chem. A, 2017,5, 6424-6431
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    A hybrid polymer/oxide/ionic-liquid solid electrolyte for Na-metal batteries

    S. Song, M. Kotobuki, F. Zheng, C. Xu, S. V. Savilov, N. Hu, L. Lu, Y. Wang and W. D. Z. Li, J. Mater. Chem. A, 2017, 5, 6424
    DOI: 10.1039/C6TA11165C

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