Porous carbon derived from disposable shaddock peel as an excellent catalyst toward VO2+/VO 2+ couple for vanadium redox battery

J. Liu, Z. A. Wang, X. W. Wu, X. H. Yuan, J. P. Hu, Q. M. Zhou, Z. H. Liu, Y. P. Wu

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

Functional porous carbon (PC) derived from bio-friendly shaddock peel has been firstly explored as catalyst for vanadium redox flow battery (VRB). The prepared PC is micro-mesoporous with high BET surface area of 882.7 m2 g-1, has some surface oxygen-containing functional groups, and is doped with N and P heteroatoms. These three factors greatly favor the electrochemical reactions of VO2+/VO2+ on the PC modified glass carbon (PC-GC). Compared with the naked GC and graphite modified GC, the PC-GC presents a lower peak separation (66 mV), higher anodic current density (17.1 mA cm-2) and cathodic current density (15.0 mA cm-2). The VRB using PC modified graphite felt (GF) as positive electrode demonstrates an enhanced voltage efficiency of 82.7% at the current density of 60 mA cm-2, and a better rate performance than that from the virginal GF.

Original languageEnglish
Pages (from-to)301-308
Number of pages8
JournalJournal of Power Sources
Volume299
DOIs
StatePublished - 20 Dec 2015

Keywords

  • Biomass
  • Catalyst
  • Porous carbon
  • Redox flow battery
  • Vanadium

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