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Fabrication of Enzymatic Biofuel Cell with Electrodes on Both Sides of Microfluidic Channel

  • Haroon Khan
  • Chul Min Kim
  • Sung Yeol Kim
  • Sanket Goel
  • Prabhat K. Dwivedi
  • Ashutosh Sharma
  • Young Ho Kim
  • Gyu Man KimEmail author
Regular Paper
  • 80 Downloads

Abstract

Enzymatic biofuel cells (EBFCs) that utilize glucose as fuel in a human body to produce electricity are being explored as promising alternatives to power implantable devices. However, some limitations need to be overcome to render such micro-electronic devices practically applicable. Here, we propose a microfluidic EBFC architecture with electrodes on both sides of the microchannel and its fabrication via stencil method. Multiwalled carbon nanotube (MWCNT) electrodes are fabricated on both sides of a Y-shaped microfluidic channel to reduce the effect of the depletion boundary layer and cross-diffusional mixing of the fuel and oxidant, which are functions of the distance from the microchannel inlet. Therefore, the microchannel length is reduced by half, while maintaining the same MWCNT electrode area. The microchannel is produced by polydimethylsiloxane (PDMS) casting whereas the electrodes are fabricated by a PDMS stencil, using MWCNT patterned on etched indium tin oxide glass. The electrodes are modified with glucose oxidase and laccase via direct covalent bonding. The cell performance is studied at different microchannel heights and flow rates, obtaining a maximum power and current density of 153 µW cm−2 and 450 µA cm−2, respectively, at a microchannel height of 450 µm and flow rate of 25 mL h−1. The double-layer EBFC shows a 23% improvement in the performance compared to a single-layer EBFC.

Keywords

Enzymatic biofuel cell Oxygen depletion layer Membraneless Carbon nanotubes 

Notes

Acknowledgements

This work was supported by the National Research Foundation of Korea Grant (NRF-2017R1A2B4004966 and NRF-2012K1A3A1A19038448) funded by the Korean Government (KMEST).

Conflict of Interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

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Copyright information

© Korean Society for Precision Engineering 2019

Authors and Affiliations

  • Haroon Khan
    • 1
  • Chul Min Kim
    • 1
  • Sung Yeol Kim
    • 1
  • Sanket Goel
    • 2
  • Prabhat K. Dwivedi
    • 3
  • Ashutosh Sharma
    • 3
    • 4
  • Young Ho Kim
    • 5
  • Gyu Man Kim
    • 1
    Email author
  1. 1.School of Mechanical EngineeringKyungpook National UniversityDaeguSouth Korea
  2. 2.Birla Institute of Technology and SciencePilaniIndia
  3. 3.Centre for NanosciencesIndian Institute of Technology KanpurKanpurIndia
  4. 4.Department of Chemical EngineeringIndian Institute of TechnologyKanpurIndia
  5. 5.Medical Device Development Centre, Daegu-Gyeongbuk Medical Innovation FoundationDaeguSouth Korea

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