Cobalt-Intercalated Birnessite-Type Manganese Oxide Catalysts for Low-Cost Cathodes in Microbial Fuel Cells
Soichiro Hirose, Kosuke Takasugi, Trang Nakamoto, Kozo Taguchi
AI summary
70% confidenceResearchers developed a cobalt-intercalated birnessite-type manganese oxide catalyst for MFC cathodes, achieving 5.8 times higher power density and 90-day operation without maintenance.
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- MFC
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Abstract
Microbial fuel cells (MFCs) are a promising technology for solving energy and water pollution problems. However, to promote the practical application of MFC, it is necessary to solve the problems of power output and electrode cost simultaneously. Therefore, transition metal-based catalysts that can improve air cathode functionality without using platinum catalysts, which are commonly used, are attracting attention. In this experiment, a cobalt-intercalated birnessite-type manganese oxide catalyst was used as the cathode of the MFC. In addition, rice husk charcoal from agricultural waste and Sumi ink were used as cathode materials to reduce cost and improve the physical stability of the electrodes. The conductivity of the Sumi ink is expected to compensate for the low conductivity of manganese oxide. The resulting power density was 5.8 times higher with the catalyst than without. It was also confirmed that the fabricated cathode operated for at least 90 days without maintenance.
Key findings
- Cobalt-intercalated birnessite-type manganese oxide catalyst improved air cathode functionality
- Rice husk charcoal and Sumi ink were used as cost-effective cathode materials
- Conductivity of Sumi ink compensated for low conductivity of manganese oxide
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- Year
- 2023