Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Evaluation of power density in microbial fuel cells using expanded graphite/carbon nanotube (CNT) composite cathode and CNT anode

팽창흑연·소나노튜브 복합 음극과 탄소나노튜브 양극으로 이루어진 미생물 연료전지의 전력수율 평가

  • 한선기 (한국방송통신대학교 환경보건학과) ;
  • 이채영 (수원대학교 토목공학과.천환경기술연구소)
  • Received : 2013.07.18
  • Accepted : 2013.08.14
  • Published : 2013.08.15
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Abstract

Electrochemical redox capacity of a microbial fuel cell (MFC) electrode is an important factor in the power density. This study was conducted to investigate the redox capacity of surface modified anode and cathode electrodes by measuring their conductivities. An anode electrode was modified with nitric acid and a cathode electrode was modified with heat treatment. The anode electrode modified with 20 % of the nitric acid concentration showed the highest conductivity of $6.2{\mu}S/cm/g$ and the maximum power density of $306.0mW/m^2$ when used in a MFC. The cathode electrode modified at $472^{\circ}C$ for 18 min showed the highest conductivity of $5.2{\mu}S/cm/g$ and the maximum power density of $276.20mW/m^2$ when used in a MFC. On the other hand, an MFC using both the electrodes showed the highest maximum power density of $408.2mW/m^2$. Meanwhile, a control MFC without modified electrodes generated very small voltage (0.014 mV), so the power density could not be measured.

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References

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