Electricity generation, energy storage, and microbial-community analysis in microbial fuel cells with multilayer capacitive anodes

被引:56
作者
Wang, Yuyang [1 ,2 ,3 ]
Chen, Ye [1 ]
Wen, Qing [1 ,4 ]
Zheng, Hongtao [2 ]
Xu, Haitao [1 ]
Qi, Lijuan [1 ]
机构
[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 15001, Heilongjiang, Peoples R China
[2] Harbin Engn Univ, Coll Power & Energy Engn, Harbin 15001, Heilongjiang, Peoples R China
[3] Harbin Univ Commerce, Coll Light Ind, Harbin 15001, Heilongjiang, Peoples R China
[4] LSMRI, State Key Lab Marine Corrosin & Protect, Qingdao 266237, Shandong, Peoples R China
基金
中国国家自然科学基金;
关键词
Capacitive bioanode; Multilayer composite; Microbial fuel cell; ENHANCED PERFORMANCE; POWER-GENERATION; CARBON NANOTUBES; LOOFAH SPONGE; COMPOSITE; BIOANODE; REMOVAL; ELECTRODE; IMPROVES; HYBRID;
D O I
10.1016/j.energy.2019.116342
中图分类号
O414.1 [热力学];
学科分类号
摘要
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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页数:10
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