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Issue 4, 2018
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Mixed ether-based solvents provide a long cycle life with high rate capability to graphite anodes for Na-ion batteries

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Abstract

Energy storage devices using sodium ions have great potential in terms of their low cost, high power, and long life. In particular, there could be a significant cost reduction, because of the abundant resource of sodium. Recently, electro-chemical sodium storage performance has been demonstrated in graphite anodes using ether-based solvents. However, the high power and long life were not compatible in the same ether solution. Here, we demonstrated using mixed ether-based solvents that a long cycle life and high rate capability can coexist in the graphite anodes for sodium-ion batteries. The cycle performance indicated that the discharge capacity retention ratio after 10 000 cycles was more than 90% and the capability of 4 A g−1/0.2 A g−1 (40C/2C) was more than 75%. These results could advance the development of sodium storage devices for practical use.

Graphical abstract: Mixed ether-based solvents provide a long cycle life with high rate capability to graphite anodes for Na-ion batteries

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Publication details

The article was received on 13 Oct 2017, accepted on 29 Nov 2017 and first published on 29 Nov 2017


Article type: Paper
DOI: 10.1039/C7CP06998G
Citation: Phys. Chem. Chem. Phys., 2018,20, 2188-2195
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    Mixed ether-based solvents provide a long cycle life with high rate capability to graphite anodes for Na-ion batteries

    T. Kajita and T. Itoh, Phys. Chem. Chem. Phys., 2018, 20, 2188
    DOI: 10.1039/C7CP06998G

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