Journal
JOURNAL OF POWER SOURCES
Volume 342, Issue -, Pages 98-104Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.12.020
Keywords
Microbial fuel cells; Stainless steel; Composite modification; Current output
Funding
- National Natural Science Foundation of China [51478431]
- Public Technology Research Plan of Zhejiang Province [201403028]
- Flanders (FWO), Belgium for the postdoctoral fellowship [12Q0615N LV]
- Natural Science Foundation of Zhejiang Province [LQ17E080002]
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In this paper, we first systematically investigate the current output performance of stainless steel electrodes (SS) modified by carbon coating (CC), polyaniline coating (PANT), neutral red grafting (NR), surface hydrophilization (SDBS), and heat treatment (HEAT). The maximum current density of 13.0 A m(-2) is obtained on CC electrode (3.0 A m(-2) of the untreated anode). Such high performance should be attributed to its large effective surface area, which is 2.3 times that of the unmodified electrode. Compared with SS electrode, about 3-fold increase in current output is achieved with PANI. Functionalization with hydrophilic group and electron medium result in the current output rising to 1.5-2 fold, through enhancing bioadhesive and electron transport rate, respectively. CC modification is the best choice of single modification for SS electrode in this study. However, this modification is not perfect because of its poor hydrophilicity. So CC electrode is modified by SDBS for further enhancing the current output to 16 A m(-2). These results could provide guidance for the choice of suitable single modification on SS electrodes and a new method for the perfection of electrode performance through composite modification. (C) 2016 Elsevier B.V. All rights reserved.
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