(690e) Hydrogen Fueled Micro-Fuel Cell with Microfluidic Channels on a PFSA Plane
Many efforts on fuel cell miniaturization are focused on silicon-based techniques as silicon is the most common substrate in MEMS technology [6, 7]. However, combining silicon devices with polymeric fuel cells at mm or sub-mm scale presents many challenges, none of which have been solved in a completely satisfactory manner . Furthermore, in recent years due to material property issues associated with PDMS such as bulk absorption of small molecules and evaporation through the device, there has been a tendency towards the employment of thermoplastics for microfluidic systems .
Distinct from previous attempts on fabricating in-planeÂ Î¼FCs in other studies, in this work we present a novel On-Membrane Micro Fuel Cell design where the micro-flow channels for fuel and oxidant input are fabricated by using a combination of laser micromachining and hot-bonding process. In preparation of the device, a laser patterned acrylic sheet was pressed onto the Nafion substrate by a gas-cushion hot-bonding and the inlet tubes were mounted on the acrylic sheet. The micro device performance was characterized by I-V polarization curves and impedance spectroscopy under dry and humidified conditions. The combined in-plane and through-plane flux of protons in the membrane can be compared to literature data.
With this fabrication technology high aspect ratio structures can be fabricated over large surface areas, which prompts a commercially successful manufacturing of polymer-based micro-components.
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