Improved power output by incorporating polyvinyl alcohol into the anode of a microbial fuel cell

Chen, X. F.; Wang, X. S.; Liao, Kuntian; Zeng, Lixuan; Xing, Lidan; Zhou, Xianggui; Zheng, Xiongwen; Li, W. S.

doi:10.1039/c5ta03318g

Cited by 28 publications

(8 citation statements)

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“…To investigate the electron transfer ability for the different CWAC anodes, EIS was performed in the three-electrode mode after incubation. The Nyquist plots are shown in Figure , and the equivalent circuit model is given as an inset in Figure a, where R s , R ct , C , and Z w represent the equivalent series resistance, the charge transfer resistance, the capacitance, and the Warburg diffusion impedance, respectively . The fitted results were simulated using the Zview software.…”

Section: Resultsmentioning

confidence: 99%

“…The Nyquist plots are shown in Figure 8, and the equivalent circuit model is given as an inset in Figure 8a, where R s , R ct , C, and Z w represent the equivalent series resistance, the charge transfer resistance, the capacitance, and the Warburg diffusion impedance, respectively. 41 The fitted results were simulated using the Zview software. The R s valuesthe combined electrolyte, substrate, and contact resistances 42 are 21.25, 19, 12.22, and 9.57 Ω for CWAC0, CWAC1, CWAC5, and CWAC10, respectively (Table 4), indicating that CWAC5 and CWAC10 have lower electrode resistances than CWAC0 and CWAC1.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Renewable Coffee Waste-Derived Porous Carbons as Anode Materials for High-Performance Sustainable Microbial Fuel Cells

Hung

Liu

Chen

2019

ACS Sustainable Chem. Eng.

121

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Microbial fuel cell (MFC) is a sustainable technology that can produce electrons using microbes. However, low power density and high cost are the two major issues that hamper the development of MFCs. In this study, we demonstrated that renewable coffee waste-derived activated carbons (CWACs) can serve as anode materials in Escherichia coli system-based MFCs. By modifying the CWAC pore size, we achieved a power density of 3927 mW m–2, which was higher than that of commercial activated carbon (975 mW m–2). The enhanced power density of the CWAC was attributed to its high conductivity and suitable pore size distribution, which led to fast electron transfer and bacterial adhesion. Furthermore, the long-term performance of the MFC with the CWAC anode was investigated; it continuously functioned for more than 100 h at a power density of 2000 mW m–2 without any further nutrient resupply. These results indicate that CWAC is a promising anode material for renewable and sustainable energy systems that could significantly reduce the device cost.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Renewable Coffee Waste-Derived Porous Carbons as Anode Materials for High-Performance Sustainable Microbial Fuel Cells

Hung

Liu

Chen

2019

ACS Sustainable Chem. Eng.

121

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“…36,37 More importantly, the N-doped surface could yield a large quantity of electrochemically active sites (such as pyrrolic nitrogen and graphitic nitrogen), and may accelerate the electron abstraction by bacteria to anode through the interaction between N-containing functional groups and cytochromes of exoelectrogens. [38][39][40][41] MOFs, as a kind of mesoporous material, have abundant pore structures that can adsorb electron shuttles secreted by exoelectrogens, thus promoting EET. 39,[42][43][44][45] In addition, various iron compounds produced by pyrolysis of MOFs can enrich iron-reducing electrogenic microorganisms from sludge to increase the proportion of exoelectrogens in anode biofilms.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, as a nitrogen‐doped carbon material, the electron‐accepting ability of the nitrogen atom could create net positive charge on adjacent carbon atoms and induce surface acidity and hydrophilicity, thus significantly enhances the negatively charged bacteria sorption 36,37 . More importantly, the N‐doped surface could yield a large quantity of electrochemically active sites (such as pyrrolic nitrogen and graphitic nitrogen), and may accelerate the electron abstraction by bacteria to anode through the interaction between N‐containing functional groups and cytochromes of exoelectrogens 38–41 . MOFs, as a kind of mesoporous material, have abundant pore structures that can adsorb electron shuttles secreted by exoelectrogens, thus promoting EET 39,42–45 .…”

Section: Introductionmentioning

confidence: 99%

3D hierarchical porous carbon foams as high‐performance free‐standing anodes for microbial fuel cells

Zhang

Wang

et al. 2022

EcoMat

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Microbial fuel cells (MFCs) that can directly convert chemical energy of organic matter into electrical energy are expected to continuously obtain energy from wastewater. However, the practical application of MFCs is still limited by unsatisfactorily low power output due to low bacterial loading capacity and relatively poor extracellular electron transport (EET) efficiency between anode and electrochemically active biofilm. Herein, hierarchical porous carbon foams (HPCFs) prepared by pyrolyzing nanoscale Fe-MIL-88B-NH 2 modified seitan composite were developed as 3D free-standing MFC anodes. Its marcoporous structure and good biocompatibility favor the bacterial adhesion, while the N-doped carbon skeleton, abundant mesopores and iron ions boost the bacteria-electrode charge transfer efficiency. As a result, the HPCF anodes equipped MFCs deliver a maximum power density of 11.21 W m À3 and a current density of 23.11 A m À3 , outperforming the most previously reported 3D porous anodes. This study provides a new idea for the design of anodes for highperformance MFCs.

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“…That is to say, biofilm should be formed on anode. Therefore, designing an anode that favors the formation of biofilm is one of the efficient strategies to improve the power output of MFC [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Nano-materials as anode electrocatalysts for microbial fuel cells

Li¹

2019

Adv Mater Sci

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Recent progresses made in our laboratory on nano-materials as electrocatalysts for microbial fuel cells are summarized in this review. Compared to the cathode electrocatalysts for oxygen reduction reaction, which are similar to those used for other fuel cells such as proton exchange membrane fuel cells, our interest is mainly focused on the anode electrocatalysts with the aim to accelerate the charge transfer process on anodes. Various nano-materials have been developed in our laboratory as anode electrocatalysts, based on the concept that the charge transfer kinetics between anode and substrates is highly dependent of the bio-compatibility that favors the formation of biofilm on anode, and electrocatalytic activities towards the oxidation reactions of the redox couples in bacteria and the intermediates fermented by bacteria.

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Improved power output by incorporating polyvinyl alcohol into the anode of a microbial fuel cell

Abstract: In this study, polyvinyl alcohol (PVA) is proposed as a new binder to improve the power output of a microbial fuel cell.

Cited by 28 publications

References 50 publications

Renewable Coffee Waste-Derived Porous Carbons as Anode Materials for High-Performance Sustainable Microbial Fuel Cells

Renewable Coffee Waste-Derived Porous Carbons as Anode Materials for High-Performance Sustainable Microbial Fuel Cells

3D hierarchical porous carbon foams as high‐performance free‐standing anodes for microbial fuel cells

Nano-materials as anode electrocatalysts for microbial fuel cells

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