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We report a novel aluminium-ion rechargeable battery comprised of an electrolyte containing AlCl3 in the ionic liquid, 1-ethyl-3-methylimidazolium chloride, and a V2O5 nano-wire cathode against an aluminium metal anode. The battery delivered a discharge capacity of 305 mAh g−1 in the first cycle and 273 mAh g−1 after 20 cycles, with very stable electrochemical behaviour.

Graphical abstract: The rechargeable aluminum-ion battery

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