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A miniature direct methanol fuel cell using platinum sputtered microcolumn electrodes with limited amount of fuel

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2 Author(s)
Young Ho Seo ; Digital Nanolocomotion Center, Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea ; Young-Ho Cho

We present a miniature direct methanol fuel cell (micro-DFMC) using platinum sputtered microcolumn electrodes (rugged electrode) with limited amount of fuel. We use the rugged electrode in order to improve the power density of the micro-DMFC that consists two electrodes and polymer electrolyte. We also design the built-in fuel chamber in the anode for portable electronics applications. We design and fabricate both rugged and planar electrodes, having an identical projective area of 5 mm × 5 mm. We compare the characteristics of the rugged and planar electrodes as well as the rugged electrode micro-DMFC and planar electrodes micro-DMFC. The rugged electrode shows 1.73 times larger diffusion current density than that from planar electrode at electrode potential of 1.1 V in half cell test. The rugged electrode micro-DMFC shows the maximum power of 24.8 μW (122.4 μW/cm2) at 0.65V and the projective area of 5 mm × 5 mm, while planar electrode micro-DMFC shows the maximum power of 1.1 μW (5.6 μW/cm2) at voltage of 0.08 V and same projective area.

Published in:

Micro Electro Mechanical Systems, 2003. MEMS-03 Kyoto. IEEE The Sixteenth Annual International Conference on

Date of Conference:

19-23 Jan. 2003

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