Microbial Fuel Cells with a Mediator-Polymer Modified Anode

The electrical performance of microbial fuel cells (MFCs) using a modified anode consisted of anthraquinone-2,6-disulfate as a mediator, polyethyleneimine as a functional polymer and graphite felt as a base material was studied. The performance of an MFC was improved using the mediator-polymer modified graphite felt anode. The maximum power density of the mediator-polymer modified MFC was reached 1.0 mW cm−2 (per geometric anode surface area), it was 2.7 times higher than that of an mediator-less MFC. The power generation of mediator-polymer modified MFC was stable for more than 10 days.