Journal
CARBON
Volume 114, Issue -, Pages 311-316Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2016.12.014
Keywords
Silk; Pyroprotein; Carbon mesh; Air electrode; Current collector; Li-O-2 battery
Funding
- World Premier Materials grant - Korea government Ministry of Trade, Industry and Energy
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2016R1A2B4009601]
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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.
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