Development of carbon free diffusion layer for activated carbon air cathode of microbial fuel cells

Wulin Yang, Kyoung Yeol Kim, Bruce E. Logan

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

The fabrication of activated carbon air cathodes for larger-scale microbial fuel cells requires a diffusion layer (DL) that is highly resistant to water leakage, oxygen permeable, and made using inexpensive materials. A hydrophobic polyvinylidene fluoride (PVDF) membrane synthesized using a simple phase inversion process was examined as a low cost ($0.9/m2), carbon-free DL that prevented water leakage at high pressure heads compared to a polytetrafluoroethylene/carbon black DL ($11/m2). The power density produced with a PVDF (20%, w/v) DL membrane of 1400±7mW/m2 was similar to that obtained using a wipe DL [cloth coated with poly(dimethylsiloxane)]. Water head tolerance reached 1.9m (~19kPa) with no mesh supporter, and 2.1m (~21kPa, maximum testing pressure) with a mesh supporter, compared to 0.2±0.05m for the wipe DL. The elimination of carbon black from the DL greatly simplified the fabrication procedure and further reduced overall cathode costs.

Original languageEnglish (US)
Pages (from-to)318-322
Number of pages5
JournalBioresource technology
Volume197
DOIs
StatePublished - Dec 1 2015

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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