Self-Supporting Conductive Polyaniline–Sodium Alginate–Graphene Oxide/Carbon Brush Hydrogel as Anode Material for Enhanced Energy in Microbial Fuel Cells

Microbial fuel cells (MFCs) have exhibited potential in energy recovery from waste. In this study, an MFC reactor with a polyaniline–sodium alginate–graphene oxide (PANI–SA–GO)/carbon brush (CB) hydrogel anode achieved maximum power density 4970 mW/m3 and produced corresponding current of 4.66 A/m2, which was 2.72 times larger than the equipped carbon felt film (CF) (1825 mW/m3). Scanning electron microscopy indicated that PANI-SA-GO/CB composite had three-dimensional macroporous structure. This structure large specific surface area, providing more sites for microbial growth attachment. When charging-discharging time set 60 min to 90 min, stored charge (6378.41 C/m2) 15.08 higher CF (423.05 C/m2). Thus, mismatch between supply electricity consumption addressed. study provided simple environment-friendly modification method allowed prepared PANI–SA–GO/CB markedly promote storage output performance MFC.