Effects of operating conditions on the performances of individual cell and stack of PEM fuel cell

Esterification as a diagnostic tool to predict proton conductivity affected by impurities on Nafion components for proton exchange membrane fuel cells

“…3, the conductivities with TOS during ammonia exposure to the N-211 at various operating temperatures are illustrated. The initial and steady-state ionic conductivities slightly increased with an increase in operating temperature, consistent with results reported in the literature [30]. The rate of decrease in conductivity is Table 1 Conductivity of N-211 in the H + /NH4 + -form with various proton compositions at 80 • C.…”

Performance of fuel cell using calcium phosphate hydrogel membrane prepared from waste incineration fly ash and chicken bone powder

“…It can be found that the fuel cell with an MEA fabricated by using the perfluorosulfonic polymer has a higher performance than any other fuel cell having the calcium phosphate hydrogel membrane at 57 • C. Namely, the fuel cell having the perfluorosulfonic polymer membrane has the maximum power density and the lowest decreasing rate in the cell voltage which corresponds to the lowest inertial resistance. However, the cell performance of this fuel cell is not so high as the result in the literature [19]. Because hydrogen gas was fed into fuel cell at relatively lower pressure in order to prevent from breaking the hydrogel membrane.…”

Design, fabrication and performance test of a planar array module-type micro fuel cell stack

“…The effect and influence [8,9] differ from the operation of a single cell; however it is difficult to provide an even fuel supply and fluid distribution, especially to cells connected in parallel and with a homogenous/uniform temperature [2]. Recently, an extensive review of polymer electrolyte membrane fuel cell stack testing was presented by Miller and Bazylak [10] in which several methods of performance evaluation, including the traditional VI/PI curves, electrochemical impedance spectroscopy and cyclic voltammetry, were examined and discussed.…”