A study of Pt<inf>x</inf>Co<inf>y</inf>alloy nanoparticles as cathode catalysts for lithium-air batteries with improved catalytic activity

Publication Type:
Journal Article
Citation:
Journal of Power Sources, 2013, 244 pp. 488 - 493
Issue Date:
2013-01-01
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A series of PtxCoy(x:y = 4, 2, 1, and 0.5) alloy nanoparticles deposited on Vulcan XC-72 carbon was prepared through a chemical reduction method. The structures and morphologies of the as-prepared nanoparticles were characterized by X-ray diffraction, field emission scanning electron microscopy and transmission electron microscopy, which revealed the formation of Pt-Co alloys during the co-reduction process. PtxCoyalloy nanoparticles were applied as catalysts in lithium-air batteries. Through electrochemical testing, we found that the Pt based alloy nanocatalysts significantly increased the specific capacity of lithium-air batteries and the increase of Co content in PtxCoyalloy nanoparticles further enhanced the catalytic activity. This result illustrated that PtxCoyalloy nanoparticles could be used as an efficient catalyst material for lithium-air batteries with the feature of much reduced cost, but drastically increased catalytic activity. © 2012 Elsevier B.V. All rights reserved.
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