Journal
BIORESOURCE TECHNOLOGY
Volume 316, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.123919
Keywords
Air cathode; Bioelectricity; Electrode potentials; Ferricyanide
Funding
- Stan and Flora Kappe endowment
- Penn State University
Ask authors/readers for more resources
Ferricyanide is often used in microbial fuel cells (MFCs) to avoid oxygen intrusion that occurs with air cathodes. However, MFC internal resistances using ferricyanide can be larger than those with air cathodes even though ferricyanide results in higher power densities. Using a graphite fiber brush cathode and a ferricyanide catholyte (FC-B) the internal resistance was 62 +/- 4 m Omega m(2), with 84 +/- 8 m Omega m(2) obtained using ferricyanide and a flat carbon paper cathode (FC-F) and only 51 +/- 1 m Omega m(2) using a 70% porosity air cathode (A-70). The FC-B MFCs produced the highest maximum power density of all configurations examined: 2.46 +/- 0.26 W/m(2), compared to 1.33 +/- 0.14 W/m(2) for the A-70 MFCs. The electrode potential slope (EPS) analysis method showed that electrode resistances were similar for ferricyanide and air-cathode MFCs, and that higher power was due to the larger experimental working potential (500 +/- 12 mV) of ferricyanide compared to the air cathode (233 +/- 5 mV).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available