期刊
ELECTROCHIMICA ACTA
卷 359, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.136949
关键词
Microbial fuel cell; Anode performance; Poly(diallyldimethylammonium chloride); Reduced graphene oxide; Synergistic effect
资金
- National Key R&D Program of China [2016YFF0106500]
- National Natural Science Fund of China [51,108156]
- Open Project of State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [QA201]
Microbial Fuel Cell (MFC) can recover electrical energy from wastewater as a potential technology. Rational design of electrode materials can significantly improve the MFC performance. Herein, a novel poly(diallyldimethylammonium chloride) (PDDA) synergizing reduced graphene oxide (rGO) modified carbon cloth (CC-PDDA-rGO) not only increased the anode biocompatibility, but also affected the colony structure. The CC-PDDA-rGO anode was demonstrated to significantly improve the anode performance and achieved a power density of 2039.3 I 57.5 mW m(-2), which was 6.0, 2.2, and 1.6 times than those of the CC, CC-PDDA, and CC-rGO, respectively. Additionally, it had the maximum net capacitance charge of 11.25 I 2.00 C m(-2), which was 5.1 and 5.9 times greater than those of the CC-PDDA and CC-rGO. The PDDA/rGO composite modified electrode provided a large surface area for bacterial adhesion and reduced the charge transfer resistance significantly. The EET related to the interaction of flavin with outermembrane c-type cytochromes was enhanced. Besides, the synergy of PDDA and rGO screened the strains and enriched electroactive bacteria, forming a stable and high electrochemically active biofilm. In summary, the PDDA/rGO binary composite inherited the advantages of raw materials and created the synergistic effect, which improved the power generation performance and enhanced the anodic capacitive behavior, possessing potential application in microbial fuel cells. (C) 2020 Elsevier Ltd. All rights reserved.
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