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Chinese Science Bulletin

, Volume 57, Issue32, pp 42104214

First Online: 08 March 2012Received: 09 October 2011Accepted: 27 December 2011DOI: 10.1007-s11434-012-5013-6

Cite this article as: Zhang, L., Wang, Z., Xu, D.
et al.
Chin.
Sci.
Bull.
2012 57: 4210.
doi:10.1007-s11434-012-5013-6

Abstract

Lithium-air Li-air batteries have attracted worldwide attention due to their high energy density 11140 Wh kg comparable to gasoline.
In this work, we have synthesized the -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 -MnO2 hollow clews as the catalyst.
The first discharge capacity is 596 mAh g, and the charge capacity is 590 mAh g-1 at the current density of 0.1 mA cm 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.

KeywordsLi-air battery-MnO2catalystcyclabilityThis article is published with open access at Springerlink.com

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Autor: LeiLeiZhang - ZhongLiWang - DanXu - JiJingXu - XinBoZhang - LiMinWang

Fuente: https://link.springer.com/



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