Increasing Voltage and Current by Connecting MFCs in Series and Parallel
LI Ding-jie HE Hui LU Cui-xiang LI Hao-ran DU Zhu-wei
State Key Laboratory of Biochemical Engineering, Institute of Process Engineering School of Civil and Environmental Engineering, University of Science and Technology Beijing State Key Lab. Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences State Key Laboratory of Biochemical Engineering, Institute of Process Engineering State Key Laboratory of Biochemical Engineering, Institute of Process Engineering
摘要以5个双室直接微生物燃料电池构建串、并联电池组，考察了电池不同运行阶段及不同底物和电子受体对电池组性能的影响. 结果表明，串、并联微生物燃料电池组可以提高工作电压、电流. 以氧气和铁氰化钾作为电子受体时，串联电池组的输出电压(输出功率密度)分别可达1.186 V (18.83 mW/m2)和1.417 V (51.51 mW/m2)，并联电池组输出电流(输出功率密度)可达3 mA (22.66 mW/m2)和6.86 mA (65.22 mW/m2). 串联电池组中电池间的差异是出现电池反极的主要原因，内阻较大的电池易在工作电流较大时出现反极现象. 适宜的混联方式可以降低由内阻差异引起的能量损失，外电阻为30 W时，混联电池组输出功率密度(30.3 mW/m2)是串联电池组(6.58 mW/m2)的4倍.
Abstract：Five two-chamber mediator-less microbial fuel cells were connected in series and parallel forms of cell stacks. The performances of cell stacks were studied when MFCs were running in different stages and using different substrates and electron acceptors. The results showed that connection in series or parallel increased voltage and current, respectively. Using oxygen and hexacyanoferrate as the electron acceptors, the voltage of connection in series stack enabled the voltage up to 1.186 V at output power density of 18.83 mW/m2 and 1.417 V at 51.51 mW/m2, respectively, and output current of parallel stacked cells was 3 mA at output power density of 22.66 mW/m2, and 6.86 mA at 65.22 mW/m2. The difference of individual cells in stacks was the main reason to cause cell reversal, and the cell with larger internal resistance tended to be pole reversal at large working current. Reasonable hybrid connection of MFCs reduced the energy loss caused by the difference of MFCs in series stack, when external resistance was 30 W, the output power density of adopted hybrid connection stack (30.3 mW/m2) was around 4 times as that of series stacked MFCs (6.58 mW/m2).
李顶杰 何辉 卢翠香 李浩然 杜竹玮. 串/并联微生物燃料电池的性能[J]. , 2009, 9(2): 338-343.
LI Ding-jie HE Hui LU Cui-xiang LI Hao-ran DU Zhu-wei. Increasing Voltage and Current by Connecting MFCs in Series and Parallel. , 2009, 9(2): 338-343.
2009, Vol. 9 
