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미생물 연료전지의 전력 발생 향상을 위한 전류 포집체 면적 증가에 대한 영향
채형원 ( Chai Hyungwon ),정석희 ( Jung Sokhee ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
Microbial fuel cell (MFC) is an innovative environmental and energy system that converts organic wastewater into electrical energy. For the practical implementation of MFC as a wastewater treatment process, a number of limitations need to be overcome. Improving cathodic performance is one of the major challenges, and introduction of a current collector can be an easy and practical solution. In this study, three types of current collectors made of stainless steel (SS) were tested in a single-chamber cubic MFC. The three current collectors had different contact areas to the cathode (P 1.0 cm<sup>2</sup>; PC 4.3 cm<sup>2</sup>; PM 6.5 cm<sup>2</sup>) and increasing the contacting area enhanced the power and current generations and coulombic and energy recoveries by mainly decreasing cathodic charge transfer impedance. Application of the SS mesh to the cathode (PM) improved maximum power density, optimum current density, and maximum current density by 8.8%, 3.6%, and 6.7%, respectively, compared with P of no SS mesh. The SS mesh decreased cathodic polarization resistance by up to 16%, and cathodic charge transfer impedance by up to 39%, possibly because the SS mesh enhanced electron transport and oxygen reduction reaction.
미생물 연료전지의 전력 발생 향상을 위한 전류 포집체 면적 증가에 대한 영향
채형원 ( Chai Hyungwon ),정석희 ( Jung Sokhee ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
Microbial fuel cell (MFC) is an innovative environmental and energy system that converts organic wastewater into electrical energy. For the practical implementation of MFC as a wastewater treatment process, a number of limitations need to be overcome. Improving cathodic performance is one of the major challenges, and introduction of a current collector can be an easy and practical solution. In this study, three types of current collectors made of stainless steel (SS) were tested in a single-chamber cubic MFC. The three current collectors had different contact areas to the cathode (P 1.0 cm<sup>2</sup>; PC 4.3 cm<sup>2</sup>; PM 6.5 cm<sup>2</sup>) and increasing the contacting area enhanced the power and current generations and coulombic and energy recoveries by mainly decreasing cathodic charge transfer impedance. Application of the SS mesh to the cathode (PM) improved maximum power density, optimum current density, and maximum current density by 8.8%, 3.6%, and 6.7%, respectively, compared with P of no SS mesh. The SS mesh decreased cathodic polarization resistance by up to 16%, and cathodic charge transfer impedance by up to 39%, possibly because the SS mesh enhanced electron transport and oxygen reduction reaction.
미생물 연료전지의 와이어 및 메쉬 타입 전류 포집체를 이용한 환원전극의 성능 향상 연구
채형원 ( Chai Hyungwon ),정석희 ( Jung Sokhee ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
Microbial fuel cell (MFC) is environmental energy system that convert the energy contained in organic wastewater into electrical energy by microbial catalysis. High-performance electrode materials make it possible to achieve high power generation of MFC systems by reducing internal resistance. The performance impact of the anode current collector area in the MFC was investigated in this research. Carbon-based materials are generally used for the MFC anode electrode, but their conductivity is much lower than metal materials. In this study, it was hypothesized increasing metal current collector areas improve anodic performance. Carbon-felt anodes with titanium wires or stainless steel mesh were tested. In conclusion, in the IV polarization test, maximum power density, maximum current density and optimum current density were 33%, 34% and 30% higher in CF-M (2,311 mW/m<sup>2</sup>, 16,815 mA/m<sup>2</sup> and 7,651 mA/m<sup>2</sup>)than CF-W(1,737 mW/m<sup>2</sup>, 12,566 mA/m<sup>2</sup> and 5,874 mA/m<sup>2</sup>), respectively. However the stainless steel mesh used as the current collector of CF-M inhibits microbial growth and adhesion on the carbon felt and reduces mass transfer because it decreases the surface area of carbon felt.
미생물 연료전지의 와이어 및 메쉬 타입 전류 포집체를 이용한 환원전극의 성능 향상 연구
채형원 ( Chai Hyungwon ),정석희 ( Jung Sokhee ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-
Microbial fuel cell (MFC) is environmental energy system that convert the energy contained in organic wastewater into electrical energy by microbial catalysis. High-performance electrode materials make it possible to achieve high power generation of MFC systems by reducing internal resistance. The performance impact of the anode current collector area in the MFC was investigated in this research. Carbon-based materials are generally used for the MFC anode electrode, but their conductivity is much lower than metal materials. In this study, it was hypothesized increasing metal current collector areas improve anodic performance. Carbon-felt anodes with titanium wires or stainless steel mesh were tested. In conclusion, in the IV polarization test, maximum power density, maximum current density and optimum current density were 33%, 34% and 30% higher in CF-M (2,311 mW/m<sup>2</sup>, 16,815 mA/m<sup>2</sup> and 7,651 mA/m<sup>2</sup>)than CF-W(1,737 mW/m<sup>2</sup>, 12,566 mA/m<sup>2</sup> and 5,874 mA/m<sup>2</sup>), respectively. However the stainless steel mesh used as the current collector of CF-M inhibits microbial growth and adhesion on the carbon felt and reduces mass transfer because it decreases the surface area of carbon felt.