Abstract
Manganese dioxide (MnO2) and NiFe-layered double hydroxide (LDH) nanosheets were deposited on bimetallic metal sulfide (NiCo2S4) by hydrothermal reaction method, and MnO2/NiFe-LDH@NiCo2S4 was applied as cathode catalyst in microbial fuel cell (MFC). The combination of lamellar MnO2 with NiFe-LDH coated on NiCo2S4 achieved a typical core-double shell structure. The unique core-double shell structure created a rapid pathway for electron transport and reduced interfacial impedance. The MnO2/NiFe-LDH@NiCo2S4-MFC exhibited the maximum power density of 80 mW/m2, approximately 2.16 times that of the MnO2-MFC (37 mW/m2). Additionally, the maximum voltage was around 200 mV, with good stability maintained for approximately 10 d. The material exhibited excellent electrochemical properties and possessed great potential for application as cathode catalysts of MFC.
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