Journal
JOURNAL OF POWER SOURCES
Volume 299, Issue -, Pages 301-308Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.09.004
Keywords
Redox flow battery; Vanadium; Porous carbon; Catalyst; Biomass
Funding
- China National Funds for Distinguished Youth Scientists (NSFC) [51425301]
- Hunan Provincial Natural Science Foundation of China [2015JJ3074]
- Science and Technology project of Changsha [KL403147-11]
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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 m(2) 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. (C) 2015 Elsevier B.V. All rights reserved.
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