▎ 摘　　要

Poly(diallyldimethylanunonium chloride)-functionalized reduced graphene oxide (PDDA-rGO) nanomaterials are fabricated by a facile ultrasonic blending method at room temperature and proposed as anodic electrocatalyst for microbial fuel cells (MFCs). PDDA serves as a noncovalent p-type dopant with strong electron-withdrawing ability, which is beneficial to readily attract electrons and further accelerate the rate of extracellular electrontransfer (EET) from the electrochemical active bacteria to the anode. Additionally, introduction of polyelectrolyte PDDA greatly increases the electroactive area and intensifies the biocompatibility of the anode. The electrochemical active microorganisms are effectively accumulated and a stable biofilm is rapidly formed. These factors result in the reduction of internal resistance and significantly enhance the power generation for MFCs, with the largest power density of 5029.3 mW m(-2) (corresponding current density 11822.6 mA m(-2)), which is 2.51-fold and 5.46-fold of the unfunctionalized reduced graphene oxide (rGO) and bare carbon paper (CP) anodes, respectively. A facile preparation of anode materials at room temperature and the characteristics of remarkable biocurrent generation exhibit positive implication for the development of high performance MFCs.