期刊
JOURNAL OF POWER SOURCES
卷 244, 期 -, 页码 488-493出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.11.024
关键词
Pt-Co alloy nanoparticles; Catalyst; Electrochemical performance; Lithium-air batteries
资金
- Australian Research Council (ARC) [DP1093855, FT110100800]
- Australian Research Council [DP1093855, FT110100800] Funding Source: Australian Research Council
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. PtxCoy alloy 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 PtxCoy alloy nanoparticles further enhanced the catalytic activity. This result illustrated that PtxCoy alloy 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. (C) 2012 Elsevier B.V. All rights reserved.
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