A micro direct methanol fuel cell using platinum and platinum-ruthenium electroplated microchannel electrodes

Shinji Motokawa, Mohamed Mohamedi, Toshiyuki Momma, Shuichi Shoji, Tetsuya Osaka

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This work studied the design, fabrication, and performance evaluation of a novel micro direct methanol fuel cell (μDMFC). A μ-DMFC of 0.018 cm 2 active area was prepared using a series of fabrication steps from micromachined silicon wafer including photolithography, deep reactive ion etching, and electron beam deposition. The novelty of this structure is that we have integrated the anodic and cathodic micro-channels arranged in plane onto a single silicon substrate. This architecture eliminates the need for the membrane electrode assembly (MEA) used in traditional polymer electrolyte-based fuel cells. Another original aspect is the successful electroplating of Pt and Pt-Ru catalysts in the microchannels. In addition, quasi-reference electrodes could be built in the prototype cell. The experimental trials were to verify the feasibility of this novel structure on basis of MEMS technology. The fuel and oxidant were supplied to the unit cell at a rate of 10 μL/min. Preliminary test results were able to confirm that this new concept of μDMFC generates electricity. At ambient temperature under atmospheric pressure, the maximum power density was 0.44 mW/cm2 at 3 mA/cm2 with Pt anode catalyst, while the maximum power density reached 0.78 mW/cm2 at 3.6 mA/cm2 for cell with Pt-Ru anode catalyst.

Original languageEnglish
Pages (from-to)346-351
Number of pages6
JournalElectrochemistry
Volume73
Issue number5
Publication statusPublished - 2005 May 1

Keywords

  • Electroplating
  • Micro-DMFC
  • Micro-Fuel Cell
  • Platinum
  • Platinum-Ruthenium

ASJC Scopus subject areas

  • Electrochemistry

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