Biological fuel cell output

There are clear differences between chemical and microbial fuel cell anodes. The most obvious difference is that anodes of MFCs must be able to support the growth of biological organisms. MFC anodes must also be highly conductive in order to efficiently collect electrons produced by bacteria as small increases in material resistance can have a significant impact on maximum power outputs. Other considerations when selecting an anode material include the expense of the material and the ability for it to be manufactured on a large scale. 

When we compare the performance of different MFC systems, the power output usually has to be normalised to some characteristic of the fuel cell. For MFCs aiming to produce electricity, it is common to normalise the power output by the projected anode surface area, because the anode is where the biological reaction occurs. The power density (Panode/ W m ) therefore is... 

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