MFCs yesterday and today

In the past 8 years, we have seen a nearly logarithmic increase in power production with MFCs using oxygen at the cathode (Fig. 12.1). Before 2001, power production was less than 0.1 W/m of electrode. In 2001 several reports emerged on systems with power over 10 mW/m (normalized to anode surface area), and in recent years we have seen power levels over 1000 mWW, with a maximum value achieved of 2400 mW/m (normalized to the cathode surface area) (Logan et al. 2007). This is still at least an order-of-magnitude below power densities that could theoretically be achieved before mass transfer to the biofilm would limit power densities. 

Microbial Fuel Cells. By Bruce E. Logan Copyright 2008 John Wiley Sons, Inc. 

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