Two types of microbial fuel cells (MFC) were compared to determine the effect of proton exchange on power generation: a salt bridge MFC and a membrane (Nafion®) MFC. The membrane system generated up to two orders of magnitude more power (40 mw/sq m) than the salt bridge system (0.3 mw/sq m). Power generation difference between the two systems was primarily due to differences in internal resistance as measured using electrochemical impedance spectroscopy. The internal resistance of the salt bridge MFC was about 14 times higher than that in the membrane MFC. Decreasing the internal resistance could increase power output in MFC. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA 8/22-26/2004).
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)