Enhanced performance and capacitance behavior of anode by rolling Fe3O4 into activated carbon in microbial fuel cells

Xinhong Peng, Hongbing Yu, Xin Wang, Qixing Zhou, Shijia Zhang, Lijuan Geng, Jingwen Sun, Zhang Cai

Research output: Contribution to journalArticlepeer-review

150 Scopus citations

Abstract

Fe3O4 was added into the anode to improve the performance of microbial fuel cells (MFCs). Stainless steel mesh (SSM), activated carbon (AC) with SSM (AcM) and Fe3O4 added AcM (AcFeM) anodes had been made and investigated by electrochemical measurements. The maximum power density of AcFeM anode (809±5mW/m2) is 22% higher than that of AcM (664±17mW/m2), and 56 times higher than that of SSM anode (14±0.3mW/m2). Tafel tests indicate that the anode modified by Fe3O4 is kinetically more advantageous. It is demonstrated for the first time that the capacitance of anode increased after the addition of Fe3O4. With 10min of interruption, AcFeM exhibites a 41% higher cumulative charge of 3566±32C/m2 and a 32% higher net capacitance charge of 389±18C/m2 than those of the AcM control (2529±22 and 294±30C/m2), indicating that the improvement of anode performance can be also attributed to the enhancement of capacitance.

Original languageEnglish
Pages (from-to)450-453
Number of pages4
JournalBioresource Technology
Volume121
DOIs
StatePublished - 1 Oct 2012
Externally publishedYes

Keywords

  • Activated carbon
  • Extracellular electron transfer (EET)
  • FeO
  • Microbial fuel cell (MFC)
  • Transient storage

ASJC Scopus subject areas

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

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