Effect of temperature on a miniaturized microbial fuel cell (MFC)

Hao Ren, Chenming Jiang, Junseok Chae

Research output: Contribution to journalLetter

2 Citations (Scopus)

Abstract

A microbial fuel cell (MFC) is a bioinspired energy converter which directly converts biomass into electricity through the catalytic activity of a specific species of bacteria. The effect of temperature on a miniaturized microbial fuel cell with Geobacter sulfurreducens dominated mixed inoculum is investigated in this paper for the first time. The miniaturized MFC warrants investigation due to its small thermal mass, and a customized setup is built for the temperature effect characterization. The experiment demonstrates that the optimal temperature for the miniaturized MFC is 322–326 K (49–53 °C). When the temperature is increased from 294 to 322 K, a remarkable current density improvement of 282% is observed, from 2.2 to 6.2 Am −2 . Furthermore, we perform in depth analysis on the effect of temperature on the miniaturized MFC, and found that the activation energy for the current limiting mechanism of the MFC is approximately between 0.132 and 0.146 eV, and the result suggest that the electron transfer between cytochrome c is the limiting process for the miniaturized MFC.

Original languageEnglish (US)
Article number13
JournalMicro and Nano Systems Letters
Volume5
Issue number1
DOIs
StatePublished - Dec 1 2017

Fingerprint

Microbial fuel cells
Temperature
Cytochromes c
Thermal effects
Catalyst activity
Bacteria
Biomass
Current density
Electricity
Activation energy
Proteins
Electrons

Keywords

  • Activation energy
  • Cytochrome c
  • Extracellular electron transfer (EET)
  • Micro-electro-mechanical systems (MEMS)
  • Microbial fuel cell (MFC)
  • Rate limiting step
  • Temperature effect

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials

Cite this

Effect of temperature on a miniaturized microbial fuel cell (MFC). / Ren, Hao; Jiang, Chenming; Chae, Junseok.

In: Micro and Nano Systems Letters, Vol. 5, No. 1, 13, 01.12.2017.

Research output: Contribution to journalLetter

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N2 - A microbial fuel cell (MFC) is a bioinspired energy converter which directly converts biomass into electricity through the catalytic activity of a specific species of bacteria. The effect of temperature on a miniaturized microbial fuel cell with Geobacter sulfurreducens dominated mixed inoculum is investigated in this paper for the first time. The miniaturized MFC warrants investigation due to its small thermal mass, and a customized setup is built for the temperature effect characterization. The experiment demonstrates that the optimal temperature for the miniaturized MFC is 322–326 K (49–53 °C). When the temperature is increased from 294 to 322 K, a remarkable current density improvement of 282% is observed, from 2.2 to 6.2 Am −2 . Furthermore, we perform in depth analysis on the effect of temperature on the miniaturized MFC, and found that the activation energy for the current limiting mechanism of the MFC is approximately between 0.132 and 0.146 eV, and the result suggest that the electron transfer between cytochrome c is the limiting process for the miniaturized MFC.

AB - A microbial fuel cell (MFC) is a bioinspired energy converter which directly converts biomass into electricity through the catalytic activity of a specific species of bacteria. The effect of temperature on a miniaturized microbial fuel cell with Geobacter sulfurreducens dominated mixed inoculum is investigated in this paper for the first time. The miniaturized MFC warrants investigation due to its small thermal mass, and a customized setup is built for the temperature effect characterization. The experiment demonstrates that the optimal temperature for the miniaturized MFC is 322–326 K (49–53 °C). When the temperature is increased from 294 to 322 K, a remarkable current density improvement of 282% is observed, from 2.2 to 6.2 Am −2 . Furthermore, we perform in depth analysis on the effect of temperature on the miniaturized MFC, and found that the activation energy for the current limiting mechanism of the MFC is approximately between 0.132 and 0.146 eV, and the result suggest that the electron transfer between cytochrome c is the limiting process for the miniaturized MFC.

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