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Biosens Bioelectron. 2016 Jul 15;81:32-38. doi: 10.1016/j.bios.2016.02.051. Epub 2016 Feb 18.

Binder-free graphene and manganese oxide coated carbon felt anode for high-performance microbial fuel cell.

Author information

1
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
2
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China. Electronic address: liangpeng@tsinghua.edu.cn.
3
Department of Environmental Engineering, Montana Tech of the University of Montana, Butte, MT 59701, USA.
4
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, P.O. Box 165, Taiyuan, PR China.

Abstract

A novel anode was developed by coating reduced graphene oxide (rGO) and manganese oxide (MnO2) composite on the carbon felt (CF) surface. With a large surface area and excellent electrical conductivity, this binder-free anode was found to effectively enhance the enrichment and growth of electrochemically active bacteria and facilitate the extracellular electron transfer from the bacteria to the anode. A microbial fuel cell (MFC) equipped with the rGO/MnO2/CF anode delivered a maximum power density of 2065mWm(-2), 154% higher than that with a bare CF anode. The internal resistance of the MFC with this novel anode was 79Ω, 66% lower than the regular one's (234Ω). Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analyses affirmed that the rGO/MnO2 composite significantly increased the anodic reaction rates and facilitated the electron transfer from the bacteria to the anode. The findings from this study suggest that the rGO/MnO2/CF anode, fabricated via a simple dip-coating and electro-deposition process, could be a promising anode material for high-performance MFC applications.

KEYWORDS:

Carbon felt; Extracellular electron transfer; Manganese oxide; Microbial fuel cell; Reduced graphene oxide

PMID:
26918615
DOI:
10.1016/j.bios.2016.02.051
[Indexed for MEDLINE]

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