A nanostructured cathode architecture for low charge overpotential in lithium-oxygen batteries
- Authors
- Lu, Jun; Lei, Yu; Lau, Kah Chun; Luo, Xiangyi; Du, Peng; Wen, Jianguo; Assary, Rajeev S.; Das, Ujjal; Miller, Dean J.; Elam, Jeffrey W.; Albishri, Hassan M.; Abd El-Hady, D.; Sun, Yang Kook; Curtiss, Larry A.; Amine, Khalil
- Issue Date
- Aug-2013
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- NATURE COMMUNICATIONS, v.4, pp.1 - 10
- Indexed
- SCIE
SCOPUS
- Journal Title
- NATURE COMMUNICATIONS
- Volume
- 4
- Start Page
- 1
- End Page
- 10
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/26670
- DOI
- 10.1038/ncomms3383
- ISSN
- 2041-1723
- Abstract
- The lithium-oxygen battery, of much interest because of its very high-energy density, presents many challenges, one of which is a high-charge overpotential that results in large inefficiencies. Here we report a cathode architecture based on nanoscale components that results in a dramatic reduction in charge overpotential to similar to 0.2 V. The cathode utilizes atomic layer deposition of palladium nanoparticles on a carbon surface with an alumina coating for passivation of carbon defect sites. The low charge potential is enabled by the combination of palladium nanoparticles attached to the carbon cathode surface, a nanocrystalline form of lithium peroxide with grain boundaries, and the alumina coating preventing electrolyte decomposition on carbon. High-resolution transmission electron microscopy provides evidence for the nanocrystalline form of lithium peroxide. The new cathode material architecture provides the basis for future development of lithium-oxygen cathode materials that can be used to improve the efficiency and to extend cycle life.
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