Abstract
A passive micro direct glucose fuel cell (μDGFC) using SU8-current collector structures of 8 × 14 mm with a grid that allows the delivery of the reagents to the membrane-electrode assembly (MEA) by diffusion and with dimensions of ~ 200 × ~ 180 μm were fabricated by a UV-lithography technique. The SU8-current collectors were coated with Au to provide electric conductivity; a passive μDGFC was set by sandwiching an MEA between two SU8-current collectors and placed between two methacrylate pieces. The electrocatalysts consisted of commercial Au/C as anode and Pt/C as cathode. μDGFC characterization was done by measuring the polarization curves at a glucose concentration close to that found in human blood. The maximum power density achieved was ~ 0.30 mW cm−2 using 5 mM glucose as fuel and oxygen delivered from air as an oxidant. The passive micro fuel cell showed a constant current density for 30 min at a potential of 0.3 V corresponding to the maximum power density.
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The authors gratefully acknowledge CONACYT for financial support through “Cátedras CONACyT” project 513 and project FOMIX 279788. The author ALV thanks the Universidad de Antioquia.
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Dector, D., Olivares-Ramírez, J.M., Ovando-Medina, V.M. et al. Fabrication and evaluation of a passive SU8-based micro direct glucose fuel cell. Microsyst Technol 25, 211–216 (2019). https://doi.org/10.1007/s00542-018-3950-y
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DOI: https://doi.org/10.1007/s00542-018-3950-y