Sharma I, Ghangrekar M M
P K Sinha Center for Bioenergy, Indian Institute of Technology, Kharagpur 721302 India.
Department of Civil Engineering, Indian Institute of Technology, Kharagpur 721302 India E-mail:
Water Sci Technol. 2018 Feb;77(3-4):999-1006. doi: 10.2166/wst.2017.621.
An appropriate current collector (CC) is crucial for harvesting substantial power in a microbial fuel cell (MFC). In the present study, stainless steel (SS) and titanium wires were used as the CCs for both the anode and cathode of MFC-1 and MFC-2, respectively. Tungsten wire (TW) was used as the anode CC in MFC-3, with SS wire as the cathode CC. In MFC-4, TW was used as the cathode CC with SS wire as the anode CC, and in MFC-5 both electrode CCs were TW. The power density, current density, oxidation current and bio-capacitance were compared to select the best and most cost effective CC material to enhance the power output of MFCs. Maximum power densities (mW/m) of 32.28, 93.10, 225.38, 210.74, and 234.88 were obtained in MFC-1, MFC-2, MFC-3, MFC-4, and MFC-5, respectively. The highest current density (639.86 mA/m) and coulombic efficiency (23.12 ± 1.5%) achieved in MFC-5 showed TW to be the best CC for both electrodes. The maximum oxidation current of 7.4 mA and 7 mA and bio-capacitance of 10.3 mF/cm and 9.7 mF/cm were achieved in MFC-3 and MFC-5, respectively, suggesting TW is the best as the anode CC and SS wire as the cathode CC to reduce MFC fabrication costs.
合适的集流体（CC）对于在微生物燃料电池（MFC）中获取大量电能至关重要。在本研究中，不锈钢（SS）丝和钛丝分别用作MFC - 1和MFC - 2阳极和阴极的集流体。钨丝（TW）用作MFC - 3的阳极集流体，不锈钢丝用作阴极集流体。在MFC - 4中，钨丝用作阴极集流体，不锈钢丝用作阳极集流体，而在MFC - 5中两个电极的集流体均为钨丝。通过比较功率密度、电流密度、氧化电流和生物电容来选择最佳且最具成本效益的集流体材料，以提高MFC的功率输出。MFC - 1、MFC - 2、MFC - 3、MFC - 4和MFC - 5分别获得了32.28、93.10、225.38、210.74和234.88的最大功率密度（mW/m）。MFC - 5中实现的最高电流密度（639.86 mA/m）和库仑效率（23.12 ± 1.5%）表明，钨丝是两个电极的最佳集流体。MFC - 3和MFC - 5分别实现了7.4 mA和7 mA的最大氧化电流以及10.3 mF/cm和9.7 mF/cm的生物电容，这表明钨丝作为阳极集流体、不锈钢丝作为阴极集流体是降低MFC制造成本的最佳选择。
