Silver nanowires as catalytic cathodes for stabilizing lithium-oxygen batteries

Title
Silver nanowires as catalytic cathodes for stabilizing lithium-oxygen batteries
Author
선양국
Keywords
Silver nanowires; Lithium-oxygen battery; Oxygen evolution reaction; Catalyst; Lithium peroxide
Issue Date
2016-04
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v. 311, Page. 49-56
Abstract
Silver nanowires have been investigated as a catalytic cathode material for lithium-oxygen batteries. Their high aspect ratio contributes to the formation of a corn-shaped layer structure of the poorly crystalline lithium peroxide (Li2O2) nanoparticles produced by oxygen reduction in poly-ether based electrolyte solutions. The nanowire morphology seems to provide the necessary large contact area and facile electron supply for a very effective oxygen reduction reaction. The unique morphology and structure of the Li2O2 deposits and the catalytic nature of the silver nano-wires promote decomposition of Li2O2 at low potentials (below 3.4 V) upon the oxygen evolution. This situation avoids decomposition of the solution species and oxidation of the electrodes during the anodic (charge) reactions, leading to high electrical efficiently of lithium-oxygen batteries. (C) 2016 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S037877531630129X?via%3Dihubhttp://hdl.handle.net/20.500.11754/47386
ISSN
0378-7753; 1873-2755
DOI
10.1016/j.jpowsour.2016.02.021
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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