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Effect of Carbon Felt Oxidation Methods on the Electrode Performance of Vanadium Redox Flow Battery

탄소펠트의 산화처리 방법이 바나듐 레독스 흐름 전지의 전극 성능에 미치는 영향

  • Ha, Dal-Yong (Department of chemical and biological engineering, Korea university) ;
  • Kim, Sang-Kyung (Fuel cell research center, Korea Institute of Energy Research) ;
  • Jung, Doo-Hwan (Fuel cell research center, Korea Institute of Energy Research) ;
  • Lim, Seong-Yop (Fuel cell research center, Korea Institute of Energy Research) ;
  • Peck, Dong-Hyun (Fuel cell research center, Korea Institute of Energy Research) ;
  • Lee, Byung-Rok (Fuel cell research center, Korea Institute of Energy Research) ;
  • Lee, Kwan-Young (Department of chemical and biological engineering, Korea university)
  • 하달용 (고려대학교 화공생명공학과) ;
  • 김상경 (한국에너지기술연구원 연료전지연구단) ;
  • 정두환 (한국에너지기술연구원 연료전지연구단) ;
  • 임성엽 (한국에너지기술연구원 연료전지연구단) ;
  • 백동현 (한국에너지기술연구원 연료전지연구단) ;
  • 이병록 (한국에너지기술연구원 연료전지연구단) ;
  • 이관영 (고려대학교 화공생명공학과)
  • Published : 2009.08.28

Abstract

Carbon felt surface was modified by heat or acid treatment in order to use for the electrode of a redox-flow battery. Polymers on the surface of carbon felt was removed and oxygen-containing functional group was attached after the thermal treatment of carbon felt. Thermal treatment was better for the stability of the carbon structure than the acid treatment. Oxygen-containing functional group on the thermally treated carbon felt at 500$^{\circ}C$ was confirmed by XPS and elementary analysis. BET surface area was increased from nearly zero to 96 $m^2/g$. Thermally treated carbon felt at 500$^{\circ}C$ showed lower activation polarization than the thermally treated carbon felt at 400$^{\circ}C$ and the acid-treated carbon felt in the cyclicvoltammetry and polarization experiments. The thermally treated carbon felts at 400$^{\circ}C$ and 500$^{\circ}C$ and the acid-treated carbon felt was applied for the electrode to prepare vanadium redox flow battery. Voltage efficiencies of charge/discharge were 86.6%, 89.6%, and 96.9% for the thermally treated carbon felts at 400$^{\circ}C$ and 500$^{\circ}C$ and the acid-treated carbon felt, respectively.

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Cited by

  1. Electrochemical Properties of Carbon Felt Electrode for Vanadium Redox Flow Batteries by Liquid Ammonia Treatment vol.25, pp.3, 2014, https://doi.org/10.14478/ace.2014.1030