纳米Fe3O4含量对微生物燃料电池性能的影响

doi:10.3724/SP.J.1095.2013.30049

摘要/Abstract

摘要： 以不锈钢网为集流体，采用辊压工艺制备了Fe3O4质量分数分别为0%、2.5 %、5.0%和7.5%的不锈钢网、活性炭粉和Fe3O4构成的复合阳极AcM、AcFeM1、AcFeM2和AcFeM3，研究了Fe3O4含量对单室无膜空气阴极微生物燃料电池(MFC)产电性能的影响，并通过塔菲尔曲线和阳极充电放电测试研究了不同Fe3O4含量的阳极的电化学行为。结果表明，阳极Fe3O4质量分数由0%增加至2.5%、5.0%时，MFCs的最大输出功率和净电容电荷由AcM阳极的664 mW/m2和293.9 C分别上升至AcFeM1、AcFeM2电极的731 mW/m2和300.4 C、809 mW/m2和388.5 C，当Fe3O4含量继续增加至7.5%时，MFCs的产电效率和净电容电荷均减小，Fe3O4质量分数在5.0%时，MFCs性能最佳；电化学测试进一步说明Fe3O4质量分数在5.0%时，MFCs阳极的动力学活性最好。

关键词: 微生物燃料电池, 纳米Fe3O4, 产电, 暂态存储

Abstract: Composite anodes made of activated carbon powder/nano Fe3O4/stainless steel mesh(SSM) were fabricated with a mass percentage of 0, 2.5%, 5.0% and 7.5% of nano Fe3O4, and named as AcM, AcFeM1, AcFeM2 and AcFeM3, respectively. The SSM was used as both matrix and current collector. Effect of the nano Fe3O4 content on the performance of SSM was investigated in single-chamber membrane-less air cathode microbial fuel cell(MFC). The electrochemical behavior of each anode was studied by Tafel tests and charge-discharge experiments. The results indicate that the maximum power density and net capacitance charge increase from 664 mW/m2 and 293.9 C(AcM) to 731 mW/m2 and 300.4 C(AcFeM1), 809 mW/m2 and 388.5 C(AcFeM2), where nano Fe3O4 content is increased from 0 to 2.5% and 5.0%, respectively. With further increase in content of nano Fe3O4 to 7.5%, the performance of MFC inversely decreases. Thus, when the content of nano Fe3O4 is 5.0%, the best performance is reached for MFC. The electrochemical measurement also displays that the kinetic activity is the highest for AcFeM2 anode with nano Fe3O4 content of 5.0%.

Key words: microbial fuel cell, nano Fe3O4, power generation, transient storage

中图分类号:

O646.5

彭新红, 于宏兵, 王鑫. 纳米Fe₃O₄含量对微生物燃料电池性能的影响[J]. 应用化学, DOI: 10.3724/SP.J.1095.2013.30049.

PENG Xinhong, YU Hongbing*, WANG Xin. Effect of Nano Fe₃O₄ Content on the Performance in Microbial Fuel Cell[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2013.30049.

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纳米Fe₃O₄含量对微生物燃料电池性能的影响

Effect of Nano Fe₃O₄ Content on the Performance in Microbial Fuel Cell

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