title: A reversible long-life lithium-air battery in ambient air.
abstract: Electrolyte degradation, Li dendrite formation and parasitic reactions with H₂O and CO₂ are all directly correlated to reversibility and cycleability of Li-air 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-air cell has sustained repeated cycling in ambient air for 100 cycles (~78 days), with discharge capacity of 2,000 mAh g(-1). 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-air battery is attainable by coordinated approaches towards the focal issues of electrolytes and Li metal.
authors: Energy Interface Technology Group, Energy Technology Research Institute, Energy Interface Technology Group, National Institute of Advanced Industrial Science and Technology, Umezono 1-1-1, Tsukuba 305-8568, Japan.
authors: Tao
authors: T
authors: Zhang
authors: Haoshen
authors: H
authors: Zhou
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