Three-dimensional macroporous anodes based on stainless steel fiber felt for high-performance microbial fuel cells

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 reactio...

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Bibliographic Details
Published in:Journal of power sources 2014-07, Vol.258, p.204-209
Main Authors: Hou, Junxian, Liu, Zhongliang, Yang, Siqi, Zhou, Yu
Format: Article
Language:English
Subjects:
Anodes
Applied sciences
Bacteria
Biochemical fuel cells
Carbon
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrochemical impedance spectroscopy
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
Graphene
Materials
Nanoparticles
Stainless steels
Three dimensional
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Summary: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 super(-2) at a current density of 6.1 A m super(-2) in 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.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2014.02.035