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All-carbon-based cathode for a true high-energy-density Li-O-2 battery

Cited 20 time in Web of Science Cited 18 time in Scopus
Authors
Lim, Hee-Dae; Yun, Young Soo; Cho, Se Youn; Park, Kyu-Young; Song, Min Yeong; Jin, Hyoung-Joon; Kang, Kisuk
Issue Date
2017-04
Citation
Carbon, Vol.114, pp.311-316
Keywords
SilkPyroproteinCarbon meshAir electrodeCurrent collectorLi-O-2 battery
Abstract
Li-O-2 batteries have a high theoretical energy density; however, their current cathode system based on a heavy metal framework strikingly diminishes their real energy density. Herein, we report the fabrication of all-carbon-based cathodes composed of conventional active carbon and a carbon mesh (CM) framework produced from waste silk fabric by simple pyrolysis. CM frameworks show a high electrical conductivity of similar to 150 S cm(-1), good tensile strength of 34.1 +/- 5.2 MPa, and a Young's modulus of 4.03 +/- 0.7 GPa, as well as a well-ventilated ordered macroporous structure. These all-carbon-based cathodes exhibit stable cycling and high energy densities of similar to 2600 Wh kg(-1) based on total electrode weight, which are 4-15 times higher than those of conventional air cathodes. (C) 2016 Elsevier Ltd. All rights reserved.
ISSN
0008-6223
URI
https://hdl.handle.net/10371/165018
DOI
https://doi.org/10.1016/j.carbon.2016.12.014
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
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