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[×ÊÔ´] Nature communications ÐÂÎÄÕ A reversible long-life lithium¨Cair battery

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Electrolyte degradation, Li dendrite formation and parasitic reactions with H2O and CO2 are
all directly correlated to reversibility and cycleability of Li¨Cair batteries when operated in
ambient air. Here we replace easily decomposable liquid electrolytes with a solid Li-ion
conductor, which acts as both a catholyte and a Li protector. Meanwhile, the conventional
solid air cathodes are replaced with a gel cathode, which contacts directly with the solid
catholyte to form a closed and sustainable gel/solid interface. The proposed Li¨Cair cell has
sustained repeated cycling in ambient air for 100 cycles (B78 days), with discharge capacity
of 2,000mAhg1. The recharging is based largely on the reversible reactions of Li2CO3
product, originating from the initial discharge product of Li2O2 instead of electrolyte degradation.
Our results demonstrate that a reversible long-life Li¨Cair battery is attainable by
coordinated approaches towards the focal issues of electrolytes and Li metal.

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  • ¸½¼þ 1 : ncomms2855.pdf
  • 2013-05-08 17:26:10, 1.21 M

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