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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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Catalytic effects of B/N-co-Doped porous carbon incorporated with ketjenblack nanoparticles for all-vanadium redox flow batteries

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Title
Catalytic effects of B/N-co-Doped porous carbon incorporated with ketjenblack nanoparticles for all-vanadium redox flow batteries
Author
Ryu, JaechanPark, MinjoonCho, Jaephil
Issue Date
2015-11
Publisher
ELECTROCHEMICAL SOC INC
Citation
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.163, no.1, pp.A5144 - A5149
Abstract
Heteroatom-doping in carbon structures plays a key role in the catalytic activities. We report bio-derived porous carbon catalysts by a self-contained nitrogen in orange peels with additional boron co-doping. This heteroatom co-doped porous carbon materials are coated with the ketjenblack nanoparticles (KB-BNPC) to increase electrical conductivity. We newly discover that the KB-BNPC electrocatalyst increases electrocatalytic activities toward vanadium redox couples of V2+/V3+ and VO2+/VO2+, demonstrating the improvement of redox onset potentials and peak currents. Notably, we control the doping ratio of B and N atoms, suggesting that B/N ratio of 0.65 gives rise to a synergistic effect of the heteroatoms for vanadium redox reactions. We believe that the optimized porous structures and defects in the KB-BNPC catalyst can facilitate the absorption and desorption of the vanadium ions by enhancing electron and mass transfer kinetics.
URI
https://scholarworks.unist.ac.kr/handle/201301/17996
URL
http://jes.ecsdl.org/content/163/1/A5144
DOI
10.1149/2.0191601jes
ISSN
0013-4651
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