Effect of Microscale Surface Geometry of Electrodes on Performance of Microbial Fuel Cells
Tomonori Kano, Eiichi Suito, Koichi Hishida, Norihisa Miki
AI summary
70% confidenceMicroscale surface geometry of anodes significantly affects MFC performance, with optimal performance achieved when contact area between bacteria and anode is largest.
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- System
- MFC
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Abstract
In this study, we experimentally revealed that the microscale surface geometry of anodes strongly affects the performance of microbial fuel cells (MFCs). MFCs have much need to be improved in their power. The power generated by an MFC is considered to be strongly affected by the interaction between the organic bacteria and the inorganic electrode surfaces. In prior work, the nanoscale surface roughness of the anode was discussed; however, we consider that the microscale surface geometry may play a crucial role given the bacteria size of micrometer order. We used a two-chamber MFC and the direct electron transfer bacteria Shewanella putrefaciens . We prepared seven types of anode electrodes with different microscale surface geometries and experimentally found that the MFC performance depended on the contact area between the bacteria and the anode. The MFC generated the maximum power when the contact area between the anode and bacteria was the largest.
Key findings
- Microscale surface geometry of anodes strongly affects MFC performance
- Maximum power generated when contact area between anode and bacteria is largest
- Bacteria size (micrometer order) suggests microscale surface geometry plays crucial role
Keywords
Identifiers
- Journal
- Japanese Journal of Applied Physics
- Year
- 2012