Abstract
Small fuel cells are considered likely replacements for batteries in portable power applications. In this paper, the performance of a 2cm×2.4cm×1.4 cm passive miniature air breathing direct formic acid fuel cell (DFAFC) at room temperature is reported. The cell produced current density up to 250 mA/cm2 and power density up to 33 mW/cm2 at ambient conditions. The fuel cell runs successfully with formic acid concentration ranging from 1.8 and 10 M with little degradation in performance. These results show that passive fuel cells can compete with batteries in portable power applications.
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