Investigation of the electrocatalytic oxygen reduction and evolution reactions in lithium–oxygen batteries
- Univ. of Wisconsin Milwaukee, Milwaukee, WI (United States)
- Wuhan Univ. of Technology, Hubei (People's Republic of China)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
Oxygen reduction and oxygen evolution reactions were examined on graphite electrodes with different crystal orientations. The kinetics for the redox couple O2/O2•- are very fast, therefore no catalyst seems necessary to assist the charge transfer process. Apparently, the main source of the overpotential for the O2 reduction reaction is from mass diffusion. Li2O2 becomes soluble in non-aqueous electrolytes in the presence of the tetraethylammonium tetrafluoroborate additive. The soluble B-O22- ions can be oxidized electro-catalytically. The edge orientation of graphite demonstrates superior catalytic activity for the oxidation over basal orientation. The findings reveal an opportunity for recharging Li-air batteries efficiently and a new strategy of developing the catalyst for oxygen evolution reaction.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- Grant/Contract Number:
- SC00112704
- OSTI ID:
- 1177850
- Report Number(s):
- BNL-107734-2015-JA; BNL-107734-2015-JAAM; R&D Project: MA453MAEA; VT1201000
- Journal Information:
- Journal of Power Sources, Vol. 288, Issue C; ISSN 0378-7753
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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