Faradaic stoichiometry

As will be reported, as result of continuous efforts to optimize cell components and cell structure in developing DMFCs for portable power applications, we were able to demonstrate 30-cell DMFC stacks operated at 60 °C and fed with ambient air at 2-3 times faradaic stoichiometry, generating a power density of 320 W (active stack volume) during at least the initial week of testing in our laboratory. 

Strategy. We will need to decide first (i) the identity and stoichiometry of the second electrode reaction. Then, we will work out (ii) how much of the charge was required to form the hydrogen by this route. Therefore, knowing the overall charge and the amount consumed in the side reaction, (iii) we can work out the faradaic fraction utilized to form copper metal. 

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