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The study investigates the impact of electrode materials on the electricity generation of Microbial Fuel Cells (MFCs) using activated sludge as a substrate. The results show that different electrode materials, including graphite pole, carbon paper 60, and carbon paper 90, affect the area power density and output voltage of MFCs. The carbon paper 90 produces the steadiest area power density and the most stable output voltage.

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What they did

System
MFC

What worked

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Abstract

The electrode material has the very important influence to the microbial fuel cell. The different electrode materials were studied for producing the electricity performance to MFC by the activated sludge as the substrate. The results indicated that the anode of graphite pole was 0.63 mW/cm 2 of the area power density. The carbon paper was 60 (0.50mW/cm 2 ). Carbon paper 90 was 0.23mW/cm 2 . Although having the biggest area power density, the general trend of the graphite pole is much lower than others and production of the electricity was not good. Even though the maximum of area power density of graphite pole, it might be the reason for increasing nutritive compound and elevation of temperature. The carbon paper 90 produce the area power density is the steadiest among three poles and its output voltage is a quite stable and low. MFC is excellent under carbon paper 90. The area power density had strong fluctuating scope, the power density is big and the overall value is high under carbon paper 60.

Key findings

  • The anode of graphite pole achieved an area power density of 0.63 mW/cm²
  • Carbon paper 60 had an area power density of 0.50 mW/cm²
  • Carbon paper 90 produced an area power density of 0.23 mW/cm² with the steadiest output

Keywords

Microbial fuel cellPower densityAnodeGraphiteElectrodeCarbon fibers

Identifiers

DOI
10.4028/www.scientific.net/amr.183-185.1549
Journal
Advanced Materials Research
Year
2010