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A 3.8-V earth-abundant sodium battery electrode

Barpanda, Prabeer and Oyama, Gosuke and Nishimura, Shin-ichi and Chung, Sai-Cheong and Yamada, Atsuo (2014) A 3.8-V earth-abundant sodium battery electrode. In: NATURE COMMUNICATIONS, 5 .

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Official URL: http://dx.doi.org/ 10.1038/ncomms5358


Rechargeable lithium batteries have ushered the wireless revolution over last two decades and are now matured to enable green automobiles. However, the growing concern on scarcity and large-scale applications of lithium resources have steered effort to realize sustainable sodium-ion batteries, Na and Fe being abundant and low-cost charge carrier and redox centre, respectively. However, their performance is limited owing to low operating voltage and sluggish kinetics. Here we report a hitherto-unknown material with entirely new composition and structure with the first alluaudite-type sulphate framework, Na2Fe2(SO4)(3), registering the highest-ever Fe3+/ Fe2+ redox potential at 3.8V (versus Na, and hence 4.1V versus Li) along with fast rate kinetics. Rare-metal-free Na-ion rechargeable battery system compatible with the present Li-ion battery is now in realistic scope without sacrificing high energy density and high power, and paves way for discovery of new earth-abundant sustainable cathodes for large-scale batteries.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the NATURE PUBLISHING GROUP, MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 18 Sep 2014 09:11
Last Modified: 18 Sep 2014 09:11
URI: http://eprints.iisc.ac.in/id/eprint/49905

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