1. Binder-free graphene and manganese oxide coated carbon felt anode for high-performance microbial fuel cell.
- Author
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Zhang, Changyong, Liang, Peng, Yang, Xufei, Jiang, Yong, Bian, Yanhong, Chen, Chengmeng, Zhang, Xiaoyuan, and Huang, Xia
- Subjects
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MICROBIAL fuel cells , *GRAPHENE oxide , *MANGANESE oxides , *BINDING agents , *SURFACE coatings , *ANODES , *ELECTRIC conductivity - Abstract
A novel anode was developed by coating reduced graphene oxide (rGO) and manganese oxide (MnO 2 ) 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/MnO 2 /CF anode delivered a maximum power density of 2065 mW m −2 , 154% higher than that with a bare CF anode. The internal resistance of the MFC with this novel anode was 79 Ω, 66% lower than the regular one's (234 Ω). Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analyses affirmed that the rGO/MnO 2 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/MnO 2 /CF anode, fabricated via a simple dip-coating and electro-deposition process, could be a promising anode material for high-performance MFC applications. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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