Enhance electron transfer and performance of microbial fuel cells by perforating the cell membrane

In this study, a facile bacteria treatment approach by chemically "perforating" pores and channels on the bacterial membrane is developed to significantly improve the electron transfer rate and power density of microbial fuel cell (MFC). The enhancements are due to increased mediator excretion evidenced by UV–vis absorption measurements and enhanced direct electron transfer through the bacterial membrane as proved by the significantly increased bioelectrocatalytic currents measured with cyclic voltammograms.

► A facile chemical treatment perforates pores and channels on bacterial outer membrane.
► Perforated cells increase both mediated and direct electron transfer.
► Perforated cells have significantly boosted microbial fuel cell power density.