▎ 摘　　要

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 with 4970 mW/m(3) and produced a corresponding current density of 4.66 A/m(2), which was 2.72 times larger than the MFC equipped with a carbon felt film (CF) anode (1825 mW/m(3)). Scanning electron microscopy indicated that the PANI-SA-GO/CB composite anode had a three-dimensional macroporous structure. This structure had a large specific surface area, providing more sites for microbial growth and attachment. When the charging-discharging time was set from 60 min to 90 min, the stored charge of the PANI-SA-GO/CB hydrogel anode (6378.41 C/m(2)) was 15.08 times higher than that of the CF (423.05 C/m(2)). Thus, the mismatch between power supply and electricity consumption was addressed. This study provided a simple and environment-friendly modification method and allowed the prepared PANI-SA-GO/CB hydrogel anode to markedly promote the energy storage and output performance of the MFC.