Three-dimensional macroporous anodes based on stainless steel fiber felt for high-performance microbial fuel cells
Three-dimensional macroporous anodes based on stainless steel fiber felt for high-performance microbial fuel cells
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DOI：
10.1016/j.jpowsour.2014.02.035
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发表时间：
2014-07
影响因子：
9.2
通讯作者：
Junxian Hou;Zhongliang Liu;Siqi Yang;Yu Zhou
中科院分区：
文献类型：
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作者：
Junxian Hou;Zhongliang Liu;Siqi Yang;Yu Zhou
通过将碳纳米颗粒（石墨烯、碳纳米管或活性炭）涂覆在具有开放、固体和大孔结构的不锈钢纤维毡（SSFF）上来构建三维（3D）大孔阳极。这些修饰电极提供了大的表面积用于反应、界面传输和生物相容性界面，可用于细菌定殖和底物传输。在6.1 A m-2的电流密度下，石墨烯修饰的阳极在MFC中的最大功率密度为2142 mW m-2，与未修饰的SSFF-MFC相比，MFC的性能有了很大的提高。电化学阻抗谱（EIS）和极化曲线的测量结果表明，碳纳米颗粒修饰的阳极可以大大降低MFC的内阻。我们的实验结果也证明了将碳纳米颗粒嵌入到三维大孔金属支架中是一种很有前途的MFC阳极制备方法。
The three-dimensional (3D) macroporous anodes were constructed by coating carbon nanoparticles (graphene, carbon nanotube, or activated carbon) on stainless steel fiber felts (SSFFs) that have an open, solid and macroporous structure. These modified electrodes provided large surface area for reaction, interfacial transport and biocompatible interface available for bacterial colonization and substrate transport. Graphene modified anode delivered a maximum power density of 2142 mW m−2at a current density of 6.1 A m−2in MFC, greatly improved the performance of MFC compared with the unmodified SSFF-MFC. Electrochemical impedance spectroscopy (EIS) measurements together with the polarization curves demonstrated that carbon nanoparticles modified anodes could greatly decrease MFCs' internal resistance. Our experimental results also proved that embedding carbon nanoparticles into 3D macroporous metallic scaffold is a promising method for MFC anode fabrication.