A nanostructured cathode architecture for low charge overpotential in lithium-oxygen batteries

Title
A nanostructured cathode architecture for low charge overpotential in lithium-oxygen batteries
Author
선양국
Keywords
ATOMIC LAYER DEPOSITION; RECHARGEABLE LI-O-2 BATTERIES; AIR BATTERIES; ELECTROLYTES; NANOPARTICLES; CHALLENGES; NANOPORES; CATALYST
Issue Date
2013-08
Publisher
Nature Publishing Group
Citation
Nature Communications, 29 August 2013, 4, P.2383
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 ~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.
URI
https://www.nature.com/articles/ncomms3383http://hdl.handle.net/20.500.11754/45059
ISSN
2041-1723
DOI
10.1038/ncomms3383
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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