PEDOT/graphene/nickel-nanoparticles composites as electrodes for microbial fuel cells

This paper presents a new direct electron transfer based glucose/oxygen microbial fuel cell (MFC), whose operating ability has been tested in presence of Escherichia coli ( E. coli ). A stainless steel electrode was modified to produce an anode. In the first step, electropolymerized film of poly (3,...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2019-07, Vol.30 (13), p.12001-12011
Main Authors: Hernández, Loreto A., Riveros, Gonzalo, González, Darío M., Gacitua, Manuel, del Valle, María Angélica
Format: Article
Language:English
Subjects:
Anodes
Biochemical fuel cells
Biocompatibility
Characterization and Evaluation of Materials
Chemistry and Materials Science
E coli
Electric power generation
Electrodes
Electron transfer
Glucose
Graphene
Materials Science
Maximum power density
Microorganisms
Morphology
Nanoparticles
Nickel
Optical and Electronic Materials
Stainless steels
Substrates
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Summary:This paper presents a new direct electron transfer based glucose/oxygen microbial fuel cell (MFC), whose operating ability has been tested in presence of Escherichia coli ( E. coli ). A stainless steel electrode was modified to produce an anode. In the first step, electropolymerized film of poly (3,4-ethylenedioxythiophene) (EDOT), nickel nanoparticles (np-Ni) and thermally reduced graphene (TrGO) were used and subsequently reduced to electrochemical reduced graphite oxide (ErGO). Morphological characterization of the anode shows a homogeneous distribution of the Ni nanoparticles and ErGO over the electrode surface. Subsequently, characterization of the films allow to observe an increase in the output power and enhancement biocompatibility between microorganism and modified electrode. Performance of the MFCs is estimated through in situ potential and power generation over time curves using E. coli cultures feed with glucose as the substrate. The PEDOT|ErGO|np-Ni anode displayed an absolute power and maximum power density of 3.9 ± 0.3 mW and 0.32 mW cm −2 respectively, with an internal resistance of 1630 Ω, a 30% enhancement when compared to the PEDOT|ErGO anode.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-019-01555-y