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Opening size optimization of metal matrix in rolling-pressed activated carbon air–cathode for microbial fuel cells
- Source :
- Applied Energy. 123:13-18
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- Stainless steel mesh (SSM) with four opening sizes (20–80 M) were investigated as matrixes of activated carbon air–cathodes in microbial fuel cells (MFCs). The highest power density of 2151 ± 109 mW m −2 (at 5.54 ± 0.14 A m −2 ) was obtained using 40 M, with a value 45% higher than 1485 ± 18 mW m −2 of 80 M. The trend of linear sweep voltammetries were in accordant with power output over a cathodic potential range from −0.2 to 0 V. The differences in performance were attributed to the internal resistances. Charge transfer resistance ( R ct ) was the dominant internal resistance in most of air–cathodes, with the lowest value of 2 Ω in 40 M. Density of metal mesh exhibited a more significant correlationship with maximum power densities ( R 2 = 0.9222) compared to opening size ( R 2 = 0.7068), demonstrated that the density of metal current collector was vital to the performance of cathodes.
- Subjects :
- Microbial fuel cell
Materials science
Waste management
Mechanical Engineering
Analytical chemistry
Building and Construction
Management, Monitoring, Policy and Law
Current collector
Internal resistance
Cathode
law.invention
Cathodic protection
Metal
General Energy
law
visual_art
medicine
visual_art.visual_art_medium
Activated carbon
medicine.drug
Power density
Subjects
Details
- ISSN :
- 03062619
- Volume :
- 123
- Database :
- OpenAIRE
- Journal :
- Applied Energy
- Accession number :
- edsair.doi...........376c58991dce74e8da0a8eced7d40f05