Abstract
Li-O2 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 ∼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 ∼2600 Wh kg−1 based on total electrode weight, which are 4–15 times higher than those of conventional air cathodes.
Original language | English |
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Pages (from-to) | 311-316 |
Number of pages | 6 |
Journal | Carbon |
Volume | 114 |
DOIs | |
State | Published - 1 Apr 2017 |
Bibliographical note
Publisher Copyright:© 2016 Elsevier Ltd
Keywords
- Air electrode
- Carbon mesh
- Current collector
- Li-O battery
- Pyroprotein
- Silk