Abstract
The design of a two-level slotted silicon-based electrode and a technology of its manufacturing by anisotropic etching of (110)-oriented Si wafers are described. The electrode contains two layers, one with wide channels and another with narrow slots. The first layer provides gas transport in an air-hydrogen fuel cell (FC), while the second layer can perform the functions of (i) a catalyst carrier and (ii) a gas-diffusion layer. It is shown that, by filling the narrow-slot layer with a carbon-platinum catalytic ink, it is possible to obtain a higher specific power on the anode due to an increase in the effective area as compared to that of a flat catalyst carrier. The operation of the two-level slotted electrode as a gas-diffusion layer was studied for an FC operating in a free-breathing cathode regime. This FC is characterized by increased power compared to that with a carbon paper and a single-level slotted Si electrode.
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Original Russian Text © E.V. Astrova, A.A. Tomasov, D.N. Goryachev, N.K. Zelenina, E.E. Terukova, 2010, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2010, Vol. 36, No. 10, pp. 1–8.
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Astrova, E.V., Tomasov, A.A., Goryachev, D.N. et al. Air-hydrogen fuel cell with two-level slotted silicon-based electrode. Tech. Phys. Lett. 36, 443–446 (2010). https://doi.org/10.1134/S1063785010050160
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DOI: https://doi.org/10.1134/S1063785010050160