期刊
NATURE COMMUNICATIONS
卷 4, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms3383
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资金
- U.S. Department of Energy [DE-AC02-06CH11357]
- Vehicle Technologies Office, Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE)
- Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE) Postdoctoral Research Award under the EERE Vehicles Technology Program
- Tailored Interfaces for Energy Storage, an Energy Frontier Research Center, Office of Basic Energy Sciences Research
- Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant
- Korean government, Ministry of Knowledge and Economy [20114010203150]
- National Research Foundation of Korea (NRF) grant
- Korea government (MEST) [2009-0092780]
- INCITE award
- ALCC award
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20114010203150] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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