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Mixed ether-based solvent provides long cycle life with high rate capability to graphite anode for Na-ion battery

Abstract

Energy storage devices using the sodium ion have great potentials in terms of their low cost, high power, and long life. In particular, there could be significant cost reduction, because of the abundant resource of sodium. Recently, the electro-chemical sodium storage performance has been demonstrated in graphite anode using ether-based solvent. However, the high power and long life were not compatible in the same ether solution. Here, we demonstrated that long cycle life and high rate capability can coexist in the graphite anode for sodium-ion battery by using mixed ether-based solvent. The cycle performance indicated that discharge capacity retention ratio after 10000 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 device for practical use.

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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., 2017, Accepted Manuscript
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    Mixed ether-based solvent provides long cycle life with high rate capability to graphite anode for Na-ion battery

    T. Kajita and T. Itoh, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP06998G

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