A 3.8-V earth-abundant sodium battery electrode.
作者： Prabeer Barpanda , Gosuke Oyama , Shin-ichi Nishimura , Sai-Cheong Chung , Atsuo Yamada
DOI: 10.1038/NCOMMS5358
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摘要: Rechargeable lithium batteries have ushered the wireless revolution over last two decades and are now matured to enable green automobiles. However, growing concern on scarcity large-scale applications of resources steered effort realize sustainable sodium-ion batteries, Na Fe being abundant low-cost charge carrier redox centre, respectively. their performance is limited owing low operating voltage sluggish kinetics. Here we report a hitherto-unknown material with entirely new composition structure first alluaudite-type sulphate framework, Na2Fe2(SO4)(3), registering highest-ever Fe3+/ Fe2+ potential at 3.8V (versus Na, hence 4.1V versus Li) along fast rate Rare-metal-free Na-ion rechargeable battery system compatible present Li-ion in realistic scope without sacrificing high energy density power, paves way for discovery earth-abundant cathodes batteries.
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