All-carbon-based cathode for a true high-energy-density Li-O2 battery

Hee Dae Lim, Young Soo Yun, Se Youn Cho, Kyu Young Park, Min Yeong Song, Hyoung Joon Jin, Kisuk Kang

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

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 languageEnglish
Pages (from-to)311-316
Number of pages6
JournalCarbon
Volume114
DOIs
StatePublished - 1 Apr 2017

Bibliographical note

Publisher Copyright:
© 2016 Elsevier Ltd

Keywords

  • Air electrode
  • Carbon mesh
  • Current collector
  • Li-O battery
  • Pyroprotein
  • Silk

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