Journal
ACS CATALYSIS
Volume 5, Issue 1, Pages 241-245Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs501392p
Keywords
lithium-oxygen batteries; cobalt oxide; platinum; tips-bundled nanowires; binder/carbon free; directed Li2O2 growth
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Funding
- National Basic Research Program of China [2013CB934001]
- National Natural Science Foundation of China [51101139]
- Key Science and Technology Innovation Team of Zhejiang Province [2010R50013]
- Program for Innovative Research Team in University of Ministry of Education of China [IRT13037]
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We propose a new design of a binder/carbon-free air electrode with tips-bundled Pt/Co3O4 nanowires grown directly on Ni foam substrate. In this design, the side reactions related to binder/carbon are excluded. The presence of Pt not only promotes the formation of the tips-bundled structure of Co3O4 nanowires but also directs the uniform deposition of a fluffy, thin Li2O2 layer only on the periphery of Pt/Co3O4 nanowires. This crystallization habit of Li2O2 makes it easy to decompose upon recharge with reduced side reactions. As a result, Li-O-2 batteries with this cathode show low polarization.
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