Abstract
Previously it was shown that Pt as cathode catalyst has a large overpotential during charge in rechargeable hybrid Li-air battery with sulfuric acid catholyte. This article demonstrates that a bifunctional catalyst composed of Pt and IrO2 supported on carbon nanotubes can address this problem. The specially designed and synthesized bifunctional catalyst showed significant overpotential reduction and achieved a round-trip energy efficiency of 81% after 10 cycles, higher than many achieved in aprotic Li-O2 batteries. The hybrid Li-air battery was discharged and recharged for 20 cycles at 0.2 mA/cm2, showing a fairly stable cell performance. A specific capacity of 306 mAh/g and a specific energy of 1110 Wh/kg were obtained for the hybrid Li-air battery in terms of acid weight. © 2013 Elsevier Ltd. All rights reserved.
Recommended Citation
K. Huang et al., "Increasing Round Trip Efficiency of Hybrid Li-air Battery with Bifunctional Catalysts," Electrochimica Acta, vol. 103, pp. 44 - 49, Elsevier; International Society of Electrochemistry (ISE), May 2013.
The definitive version is available at https://doi.org/10.1016/j.electacta.2013.04.027
Department(s)
Chemical and Biochemical Engineering
Keywords and Phrases
Bifunctional catalyst; Li-air battery; Oxygen evolution; Round trip efficiency; Sulfuric acid electrolyte
International Standard Serial Number (ISSN)
0013-4686
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Elsevier; International Society of Electrochemistry (ISE), All rights reserved.
Publication Date
17 May 2013
