Carbon Nano-Fiber/PDMS Composite Used as Corrosion-Resistant Coating for Copper Anodes in Microbial Fuel Cells

The development of high-performance anode materials is one of the greatest challenges for the practical implementation of Microbial Fuel Cell (MFC) technology. Copper (Cu) has a much higher electrical conductivity than carbon-based materials usually used as anodes in MFCs. However, it is an unsuitab...

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Autores principales:	Fatma Bensalah, Julien Pézard, Naoufel Haddour, Mohsen Erouel, François Buret, Kamel Khirouni
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	microbial fuel cell anode materials copper electrodes CNF-PDMS surface modification biofilm Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/27248878392e4f08aa67deba8040e7f6
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spelling	oai:doaj.org-article:27248878392e4f08aa67deba8040e7f62021-11-25T18:32:46ZCarbon Nano-Fiber/PDMS Composite Used as Corrosion-Resistant Coating for Copper Anodes in Microbial Fuel Cells10.3390/nano111131442079-4991https://doaj.org/article/27248878392e4f08aa67deba8040e7f62021-11-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/3144https://doaj.org/toc/2079-4991The development of high-performance anode materials is one of the greatest challenges for the practical implementation of Microbial Fuel Cell (MFC) technology. Copper (Cu) has a much higher electrical conductivity than carbon-based materials usually used as anodes in MFCs. However, it is an unsuitable anode material, in raw state, for MFC application due to its corrosion and its toxicity to microorganisms. In this paper, we report the development of a Cu anode material coated with a corrosion-resistant composite made of Polydimethylsiloxane (PDMS) doped with carbon nanofiber (CNF). The surface modification method was optimized for improving the interfacial electron transfer of Cu anodes for use in MFCs. Characterization of CNF-PDMS composites doped at different weight ratios demonstrated that the best electrical conductivity and electrochemical properties are obtained at 8% weight ratio of CNF/PDMS mixture. Electrochemical characterization showed that the corrosion rate of Cu electrode in acidified solution decreased from (17 ± 6) × 10<sup>3</sup> μm y<sup>−1</sup> to 93 ± 23 μm y<sup>−1</sup> after CNF-PDMS coating. The performance of Cu anodes coated with different layer thicknesses of CNF-PDMS (250 µm, 500 µm, and 1000 µm), was evaluated in MFC. The highest power density of 70 ± 8 mW m<sup>−2</sup> obtained with 500 µm CNF-PDMS was about 8-times higher and more stable than that obtained through galvanic corrosion of unmodified Cu. Consequently, the followed process improves the performance of Cu anode for MFC applications.Fatma BensalahJulien PézardNaoufel HaddourMohsen ErouelFrançois BuretKamel KhirouniMDPI AGarticlemicrobial fuel cellanode materialscopper electrodesCNF-PDMSsurface modificationbiofilmChemistryQD1-999ENNanomaterials, Vol 11, Iss 3144, p 3144 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	microbial fuel cell anode materials copper electrodes CNF-PDMS surface modification biofilm Chemistry QD1-999
spellingShingle	microbial fuel cell anode materials copper electrodes CNF-PDMS surface modification biofilm Chemistry QD1-999 Fatma Bensalah Julien Pézard Naoufel Haddour Mohsen Erouel François Buret Kamel Khirouni Carbon Nano-Fiber/PDMS Composite Used as Corrosion-Resistant Coating for Copper Anodes in Microbial Fuel Cells
description	The development of high-performance anode materials is one of the greatest challenges for the practical implementation of Microbial Fuel Cell (MFC) technology. Copper (Cu) has a much higher electrical conductivity than carbon-based materials usually used as anodes in MFCs. However, it is an unsuitable anode material, in raw state, for MFC application due to its corrosion and its toxicity to microorganisms. In this paper, we report the development of a Cu anode material coated with a corrosion-resistant composite made of Polydimethylsiloxane (PDMS) doped with carbon nanofiber (CNF). The surface modification method was optimized for improving the interfacial electron transfer of Cu anodes for use in MFCs. Characterization of CNF-PDMS composites doped at different weight ratios demonstrated that the best electrical conductivity and electrochemical properties are obtained at 8% weight ratio of CNF/PDMS mixture. Electrochemical characterization showed that the corrosion rate of Cu electrode in acidified solution decreased from (17 ± 6) × 10<sup>3</sup> μm y<sup>−1</sup> to 93 ± 23 μm y<sup>−1</sup> after CNF-PDMS coating. The performance of Cu anodes coated with different layer thicknesses of CNF-PDMS (250 µm, 500 µm, and 1000 µm), was evaluated in MFC. The highest power density of 70 ± 8 mW m<sup>−2</sup> obtained with 500 µm CNF-PDMS was about 8-times higher and more stable than that obtained through galvanic corrosion of unmodified Cu. Consequently, the followed process improves the performance of Cu anode for MFC applications.
format	article
author	Fatma Bensalah Julien Pézard Naoufel Haddour Mohsen Erouel François Buret Kamel Khirouni
author_facet	Fatma Bensalah Julien Pézard Naoufel Haddour Mohsen Erouel François Buret Kamel Khirouni
author_sort	Fatma Bensalah
title	Carbon Nano-Fiber/PDMS Composite Used as Corrosion-Resistant Coating for Copper Anodes in Microbial Fuel Cells
title_short	Carbon Nano-Fiber/PDMS Composite Used as Corrosion-Resistant Coating for Copper Anodes in Microbial Fuel Cells
title_full	Carbon Nano-Fiber/PDMS Composite Used as Corrosion-Resistant Coating for Copper Anodes in Microbial Fuel Cells
title_fullStr	Carbon Nano-Fiber/PDMS Composite Used as Corrosion-Resistant Coating for Copper Anodes in Microbial Fuel Cells
title_full_unstemmed	Carbon Nano-Fiber/PDMS Composite Used as Corrosion-Resistant Coating for Copper Anodes in Microbial Fuel Cells
title_sort	carbon nano-fiber/pdms composite used as corrosion-resistant coating for copper anodes in microbial fuel cells
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/27248878392e4f08aa67deba8040e7f6
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Carbon Nano-Fiber/PDMS Composite Used as Corrosion-Resistant Coating for Copper Anodes in Microbial Fuel Cells

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