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A 3.8-V earth-abundant sodium battery electrode

Author

Listed:
  • Prabeer Barpanda

    (The University of Tokyo
    Unit of Element Strategy Initiative for Catalysts and Batteries, ESICB, Kyoto University
    Materials Research Center, Indian Institute of Science)

  • Gosuke Oyama

    (The University of Tokyo)

  • Shin-ichi Nishimura

    (The University of Tokyo
    Unit of Element Strategy Initiative for Catalysts and Batteries, ESICB, Kyoto University)

  • Sai-Cheong Chung

    (The University of Tokyo)

  • Atsuo Yamada

    (The University of Tokyo
    Unit of Element Strategy Initiative for Catalysts and Batteries, ESICB, Kyoto University)

Abstract

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 3.8 V (versus Na, and hence 4.1 V 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.

Suggested Citation

  • Prabeer Barpanda & Gosuke Oyama & Shin-ichi Nishimura & Sai-Cheong Chung & Atsuo Yamada, 2014. "A 3.8-V earth-abundant sodium battery electrode," Nature Communications, Nature, vol. 5(1), pages 1-8, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5358
    DOI: 10.1038/ncomms5358
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