Method Development to Evaluate the Oxygen Reduction Activity of High-Surface-Area Catalysts for Li-Air Batteries

Author(s)
Lu, Yi-Chun; Gasteiger, Hubert A.; Shao-Horn, Yang
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Abstract
This study presents a new method to quantitatively determine the electrocatalytic activity of Vulcan carbon and Vulcan-supported Au nanoparticles, dispersed as catalyst thin films on glass carbon, for oxygen reduction in an aprotic electrolyte using rotating disk electrode measurements. The ORR activity of Vulcan carbon can be described by a Tafel slope of 120 mV/dec and Levich-Koutecky analysis of Vulcan carbon suggests that solvated LiO[subscript 2] is the initially formed O[subscript 2] reduction product. Discharge voltages extrapolated from this thin-film method are in excellent agreements with those of Li-oxygen batteries demonstrating its validity to serve as an effective technique for catalyst screening.
Date issued
2011-03
URI
http://hdl.handle.net/1721.1/79602
Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering; Massachusetts Institute of Technology. Department of Mechanical Engineering; Massachusetts Institute of Technology. Electrochemical Energy Laboratory
Journal
Electrochemical and Solid-State Letters
Publisher
Electrochemical Society
Citation
Lu, Yi-Chun, Hubert A. Gasteiger, and Yang Shao-Horn. Method Development to Evaluate the Oxygen Reduction Activity of High-Surface-Area Catalysts for Li-Air Batteries. Electrochemical and Solid-State Letters 14, no. 5 (2011): A70.© 2011 ECS - The Electrochemical Society.
Version: Final published version
ISSN
10990062
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