2011
DOI: 10.1016/j.electacta.2011.07.058
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Systematic study of back pressure and anode stoichiometry effects on spatial PEMFC performance distribution

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Cited by 120 publications
(105 citation statements)
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“…The reason is that the q2D model is constructed for a linear cell with a straight air channel, while in experiment we employed a true 2D cell with meander-like channels. 33 In a cell with the meander-like flow field, oxygen is transported between the adjacent turns of the meander due to under-rib diffusion and convection; these processes are ignored in the q2D model. Indeed, Figure 4 shows that in segments 6-9, the local current exceeds the 1D value.…”
Section: Fitting Results and Discussionmentioning
confidence: 99%
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“…The reason is that the q2D model is constructed for a linear cell with a straight air channel, while in experiment we employed a true 2D cell with meander-like channels. 33 In a cell with the meander-like flow field, oxygen is transported between the adjacent turns of the meander due to under-rib diffusion and convection; these processes are ignored in the q2D model. Indeed, Figure 4 shows that in segments 6-9, the local current exceeds the 1D value.…”
Section: Fitting Results and Discussionmentioning
confidence: 99%
“…33 The system allows the data collection from 10 current channels in a high (standard) current mode and from 10 channels in a low current mode. The standard current mode enables F239 the measurement of segment current densities up to 2 A cm −2 .…”
Section: Methodsmentioning
confidence: 99%
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“…Regarding the relationship between cell performance stability and the relative humidity of the supplied gases, several investigations [33][34][35][36] have shown the relation between cathode water accumulation and voltage instability in a PEMFC simulated stack. Other studies 7,18,37,38 have reported unstable cell behavior under low cathode humidification conditions due to membrane dehydration.…”
Section: -32mentioning
confidence: 99%
“…Discussion.-Only few experimental works report local impedance spectra at low oxygen stoichiometry (flow rate); 31,32,[37][38][39][40] the most detailed study has been published by Schneider et. al.…”
Section: Resultsmentioning
confidence: 99%