期刊
ENERGY
卷 189, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2019.116342
关键词
Capacitive bioanode; Multilayer composite; Microbial fuel cell
资金
- National Natural Science Foundation of China [21878060, 21476053]
- Research Fund of State Key Laboratory for Marine Corrosion and Protection of Luoyang Ship Material Research Institute [6142901180401]
- China Scholarship Council [201806685019]
- Research Project Fund of Harbin University of Commerce [2019DS082]
Microbial fuel cells (MFCs) can potentially be used for power generation, but their low energy storage hinders their practical application. This study presents a novel, multilayer capacitive bioanode, modified using nitrogen-doped carbon nanotubes (N-CNT), polyaniline (PANT), and manganese dioxide (MnO2). The power-generation and energy-storage performance of MFCs containing carbon felt (CF)/N-CNT/PANI/MnO2 anodes was found to be much higher than that of traditional MFCs. The power density of an MFC with a CF/N-CNT/PANI/MnO2 bioanode (13.8 W/m(3)) was 2.7 times greater than that of an MFC with a bare anode (3.73 W/m(3)). Similarly, the exchange current density of the bioanode (0.41 A/m(2)) was much higher than that of the bare anode (0.06 A/m(2)). In chronoamperometric tests with 60 min of charging and discharging, it was observed that the stored charge of the bioanode (2492.80 C/m(2)) was 33 times higher than that of the bare anode (75.50 C/m(2)). High-throughput sequencing results showed that the CF/N-CNT/PANI/MnO2-modified bioanode exhibited high community diversity and selective enrichment of electrogenic bacteria. The dominant genera on the modified anode were electroactive bacteria, Desulfuromonas (34.39%) and Geobacter (27.93%). Therefore, MFCs with capacitive bioanodes show potential for storage and release of energy within short periods of time. (C) 2019 Elsevier Ltd. All rights reserved.
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