Abstract
Lithium-air (Li-air) batteries have attracted worldwide attention due to their high energy density (11140 Wh kg−1) comparable to gasoline. In this work, we have synthesized the α-MnO2 hollow clews via a simple method and characterized them by X-ray diffraction and scanning electron microscope. Interestingly, cycle performance of Li-air batteries is improved greatly when using the α-MnO2 hollow clews as the catalyst. The first discharge capacity is 596 mAh g−1, and the charge capacity is 590 mAh g-1 at the current density of 0.1 mA cm−2 between 2.0 and 4.2 V using the Vulcan XC-72 as the carbon material. Additionally, by re-assembling new batteries with the used lithium foil, separators and cathode separately, we find that the cathode is the key role to end the Li-air battery life.
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Zhang, L., Wang, Z., Xu, D. et al. α-MnO2 hollow clews for rechargeable Li-air batteries with improved cyclability. Chin. Sci. Bull. 57, 4210–4214 (2012). https://doi.org/10.1007/s11434-012-5013-6
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DOI: https://doi.org/10.1007/s11434-012-5013-6