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090			_aB-13974
245	1	0	_aNonlinear frequency response analysis of dehydration phenomena in polymer electrolyte membrane fuel cells
490	0		_vInternational Journal of Hydrogen Energy, 37(9), p.7689-7701, 2012
520	3		_aDehydration phenomena in a PEM fuel cell were investigated by nonlinear frequency response analysis (NFRA)in a differential H2/H2 cell. The linear H1,0 spectra, which are equal to classic EIS spectra, showed not only an increase of the membrane resistance but also an increase of the anode reaction resistance, caused by dehydration leading to the decrease of the protonic conductivity of the polymer network in the catalyst layer. With this, active sites with long protonic pathes to the membrane become inactive. In order to further clarify this effect, modelling work was used. Therefore, proton transport was incorporated into an existing model of a differential H2/H2 cell. Finally, the key features of NFRA spectra under dehydration and CO poisoning are compared in order to discuss the suitability of NFRA for unambiguous diagnosis of PEMFC. It can be seen that while the linear spectrum is not sufficient to distinguish between both cases, the second order frequency response functions can be used for discrimination.
650	1	4	_aPOLYMER ELECTROLYTE MEMBRANE FUEL
650	1	4	_aCELL
650	1	4	_aNONLINEAR FREQUENCY RESPONSE ANALYSIS
650	1	4	_aELECTROCHEMICAL IMPEDANCE SPECTROSCOPY
650	1	4	_aDEHYDRATION
650	1	4	_aPROTON TRANSPORT
700	1	2	_aKadyk, T.
700	1	2	_aHanke-Rauschenbach, R.
700	1	2	_aSundmacher, K.
856	4	0	_uhttps://drive.google.com/file/d/1DRhg7l0Lxjvl7kWFtrd4DxjAFTm7AjHV/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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