Improved performance of microbial fuel cell using combination biocathode of graphite fiber brush and graphite granules

Guo Dong Zhang, Qing Liang Zhao, Yan Jiao, Jin Na Zhang, Jun Qiu Jiang, Nanqi Ren, Byung Hong Kim

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

The efficiency and sustainability of microbial fuel cell (MFC) are heavily dependent on the cathode performance. We show here that the use of graphite fiber brush (GBF) together with graphite granules (GGs) as a basal material for biocathode (MFC reactor type R1) significantly improve the performance of a MFC compared with MFCs using GGs (MFC reactor type R2) or GFB (MFC reactor type R3) individually. Compared with R3, the use of the combination biocathode (R1) can shorten the start-up time by 53.75%, improve coulombic efficiencies (CEs) by 21.0 ± 2.7% at external resistance (REX) of 500 Ω, and increase maximum power densities by 38.2 ± 12.6%. Though the start-up time and open circuit voltage (OCV) of the reactor R2 are similar to R1, the CE (REX = 500 Ω) and maximum power density of R2 are 21.4 ± 1.7% and 38.2 ± 15.6% lower than that of R1. Fluorescence in situ hybridization (FISH) analyses indicate the bacteria on cathodes of R1 and R2 are richer than that of R3. Molecular taxonomic analyses reveal that the biofilm formed on the biocathode surface is dominated by strains belonging to Nitrobacter, Achromobacter, Acinetobacter, and Bacteroidetes. Combination of GFB and GGs as biocathode material in MFC is more efficient and can achieve sustainable electricity recovery from organic substances, which substantially increases the viability and sustainability of MFCs.

Original languageEnglish
Pages (from-to)6036-6041
Number of pages6
JournalJournal of Power Sources
Volume196
Issue number15
DOIs
Publication statusPublished - 1 Aug 2011
Externally publishedYes

Fingerprint

Graphite fibers
Microbial fuel cells
Graphite
brushes
Brushes
fuel cells
graphite
fibers
reactors
nitrobacter
radiant flux density
Sustainable development
Cathodes
cathodes
biofilms
Biofilms
Open circuit voltage
electricity
open circuit voltage
viability

Keywords

  • Biocathode
  • Cell performance
  • Graphite fiber brush
  • Graphite granules
  • Microbial community
  • Microbial fuel cells

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

Cite this

Improved performance of microbial fuel cell using combination biocathode of graphite fiber brush and graphite granules. / Zhang, Guo Dong; Zhao, Qing Liang; Jiao, Yan; Zhang, Jin Na; Jiang, Jun Qiu; Ren, Nanqi; Kim, Byung Hong.

In: Journal of Power Sources, Vol. 196, No. 15, 01.08.2011, p. 6036-6041.

Research output: Contribution to journalArticle

Zhang, Guo Dong ; Zhao, Qing Liang ; Jiao, Yan ; Zhang, Jin Na ; Jiang, Jun Qiu ; Ren, Nanqi ; Kim, Byung Hong. / Improved performance of microbial fuel cell using combination biocathode of graphite fiber brush and graphite granules. In: Journal of Power Sources. 2011 ; Vol. 196, No. 15. pp. 6036-6041.
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