Enhanced performance of microbial fuel cells by using MnO2/Halloysite nanotubes to modify carbon cloth anodes

Yingwen Chen, Liuliu Chen, Peiwen Li, Yuan Xu, Mengjie Fan, Shemin Zhu, Shubao Shen

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

The modification of anode materials is important to enhance the power generation of MFCs (microbial fuel cells). A novel and cost-effective modified anode that is fabricated by dispersing manganese dioxide (MnO2) and HNTs (Halloysite nanotubes) on carbon cloth to improve the MFCs' power production was reported. The results show that the MnO2/HNT anodes acquire more bacteria and provide greater kinetic activity and power density compared to the unmodified anode. Among all modified anodes, 75 wt% MnO2/HNT exhibits the highest electrochemical performance. The maximum power density is 767.3 mWm-2, which 21.6 higher than the unmodified anode (631 mW/m2). Besides, CE (Coulombic efficiency) was improved 20.7, indicating that more chemical energy transformed to electricity. XRD (X-Ray powder diffraction) and FTIR (Fourier transform infrared spectroscopy) are used to characterize the structure and functional groups of the anode. CV (cyclic voltammetry) scans and SEM (scanning electron microscope) images demonstrate that the measured power density is associated with the attachment of bacteria, the microorganism morphology differed between the modified and the original anode. These findings demonstrate that MnO2/HNT nanocomposites can alter the characteristics of carbon cloth anodes to effectively modify the anode for practical MFC applications.

Original languageEnglish (US)
Pages (from-to)620-628
Number of pages9
JournalEnergy
Volume109
DOIs
Publication statusPublished - Aug 15 2016

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Keywords

  • Carbon cloth
  • Manganese oxide/Halloysite nanotube
  • Microbial fuel cell
  • Modified anodes
  • Power density

ASJC Scopus subject areas

  • Pollution
  • Energy(all)

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