Carbon Nano-Fiber/PDMS Composite Used as Corrosion-Resistant Coating for Copper Anodes in Microbial Fuel Cells - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nanomaterials Année : 2021

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

Julien Pézard
  • Fonction : Auteur
  • PersonId : 1117494
Naoufel Haddour
Mohsen Erouel
  • Fonction : Auteur
  • PersonId : 1117495
François Buret
Kamel Khirouni
  • Fonction : Auteur
  • PersonId : 1117496

Résumé

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 3 μm y −1 to 93 ± 23 μm y −1 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 −2 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.
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Dates et versions

hal-03438846 , version 1 (22-11-2021)

Identifiants

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Fatma Bensalah, Julien Pézard, Naoufel Haddour, Mohsen Erouel, François Buret, et al.. Carbon Nano-Fiber/PDMS Composite Used as Corrosion-Resistant Coating for Copper Anodes in Microbial Fuel Cells. Nanomaterials, 2021, 11 (11), pp.3144. ⟨10.3390/nano11113144⟩. ⟨hal-03438846⟩
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