Microfluidic devices for energy conversion: Planar integration and performance of a passive, fully immersed H 2-O 2 fuel cell

Svetlana M. Mitrovski, Lindsay C.C. Elliott, Ralph G. Nuzzo

Research output: Contribution to journalArticlepeer-review

Abstract

We describe the fabrication and performance of a passive, microfluidics-based H 2-O 2 microfluidic fuel cell using thin film Pt electrodes embedded in a poly(dimethylsiloxane) (PDMS) device. The electrode array is fully immersed in a liquid electrolyte confined inside the microchannel network, which serves also as a thin gas-permeable membrane through which the reactants are fed to the electrodes. The cell operates at room temperature with a maximum power density of around 700 μW/cm 2, while its performance, as recorded by monitoring the corresponding polarization curves and the power density plots, is affected by the pH of the electrolyte, its concentration, the surface area of the Pt electrodes, and the thickness of the PDMS membrane. The best results were obtained in basic solutions using electrochemically roughened Pt electrodes, the roughness factor, R f, of which was around 90 relative to a smooth Pt film. In addition, the operating lifetime of the fuel cell was found to be longer for the one using higher surface area electrodes.

Original languageEnglish (US)
Pages (from-to)6974-6976
Number of pages3
JournalLangmuir
Volume20
Issue number17
DOIs
StatePublished - Aug 17 2004

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Fingerprint

Dive into the research topics of 'Microfluidic devices for energy conversion: Planar integration and performance of a passive, fully immersed H <sub>2</sub>-O <sub>2</sub> fuel cell'. Together they form a unique fingerprint.

Cite this