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Issue 12, 2017
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A stable 3 V all-solid-state sodium–ion battery based on a closo-borate electrolyte

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Abstract

We report on a particularly stable 3 V all-solid-state sodium–ion battery built using a closo-borate based electrolyte, namely Na2(B12H12)0.5(B10H10)0.5. Battery performance is enhanced through the creation of an intimate cathode–electrolyte interface resulting in reversible and stable cycling with a capacity of 85 mA h g−1 at C/20 and 80 mA h g−1 at C/5 with more than 90% capacity retention after 20 cycles at C/20 and 85% after 250 cycles at C/5. We also discuss the effect of cycling outside the electrochemical stability window and show that electrolyte decomposition leads to faster though not critical capacity fading. Our results demonstrate that owing to their high stability and conductivity closo-borate based electrolytes could play a significant role in the development of a competitive all-solid-state sodium–ion battery technology.

Graphical abstract: A stable 3 V all-solid-state sodium–ion battery based on a closo-borate electrolyte

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Article information


Submitted
23 Aug 2017
Accepted
17 Nov 2017
First published
17 Nov 2017

Energy Environ. Sci., 2017,10, 2609-2615
Article type
Paper

A stable 3 V all-solid-state sodium–ion battery based on a closo-borate electrolyte

L. Duchêne, R.-S. Kühnel, E. Stilp, E. Cuervo Reyes, A. Remhof, H. Hagemann and C. Battaglia, Energy Environ. Sci., 2017, 10, 2609
DOI: 10.1039/C7EE02420G

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