期刊
JOURNAL OF POWER SOURCES
卷 395, 期 -, 页码 221-227出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2018.05.043
关键词
Microbial fuel cell; Graphene membrane air-cathode; Phase inversion method; Biofilm inhibition
资金
- National Key R&D Program of China [2016YFE0106500]
- National Natural Science Fund of China [51408156]
- Open Project of State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [QA201609-01]
- International Cooperating Project between China and European Union [2014DFE90110]
Air-cathodes in microbial fuel cells that can also filter wastewater provide the dual benefits of electricity production and reduction of the effluent chemical oxygen demand. Air-cathodes prepared using a novel activated carbon/graphene membrane (2, 5 or 10% graphene by weight) prepared by phase inversion have good conductivities (5.6 +/- 0.5 to 7.3 +/- 0.6 mS cm(-1)) compared to control (3.0 +/- 0.4 mS cm(-1), activated carbon, no graphene). The cathode with 5 wt% graphene produces the highest maximum power density of 1460 +/- 10 mW m(-2), which is 58% higher than that the control (928 +/- 8 mW m(-2)). The increased power is due to an 88% reduction in charge transfer resistance of 6.0 +/- 0.3 Omega (cathode with 5 wt% graphene) compared to the control. Following a cycle of treatment and current generation, 60 +/- 1% of the chemical oxygen demand is removed from the remaining chemical oxygen demand, producing an effluent chemical oxygen demand concentration of 20 +/- 1 mg L-1. Biomass (4.99 +/- 0.02 mg-protein cm(-2)) is decreased by 33% compared to the control. These results demonstrate that cathodes made with graphene can produce electricity and a high quality effluent with low cathode biofouling.
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