A Kernel for Calculating PEM Fuel Cell Distribution of Relaxation Times

Impedance of all oxygen transport processes in PEM fuel cell has negative real part in some frequency domain. A kernel for calculation of distribution of relaxation times (DRT) of a PEM fuel cell is suggested. The kernel is designed for capturing impedance with negative real part and it stems from t...

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Autor principal:	Andrei Kulikovsky
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	PEM fuel cell impedance GDL modeling distribution of relaxation times (DRT) General Works A
Acceso en línea:	https://doaj.org/article/366afd20917a45049478621324042e52
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id	oai:doaj.org-article:366afd20917a45049478621324042e52
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spelling	oai:doaj.org-article:366afd20917a45049478621324042e522021-12-02T08:00:23ZA Kernel for Calculating PEM Fuel Cell Distribution of Relaxation Times2296-598X10.3389/fenrg.2021.780473https://doaj.org/article/366afd20917a45049478621324042e522021-12-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fenrg.2021.780473/fullhttps://doaj.org/toc/2296-598XImpedance of all oxygen transport processes in PEM fuel cell has negative real part in some frequency domain. A kernel for calculation of distribution of relaxation times (DRT) of a PEM fuel cell is suggested. The kernel is designed for capturing impedance with negative real part and it stems from the equation for impedance of oxygen transport through the gas-diffusion transport layer (doi:10.1149/2.0911509jes). Using recent analytical solution for the cell impedance, it is shown that DRT calculated with the novel K2 kernel correctly captures the GDL transport peak, whereas the classic DRT based on the RC-circuit (Debye) kernel misses this peak. Using K2 kernel, analysis of DRT spectra of a real PEMFC is performed. The leftmost on the frequency scale DRT peak represents oxygen transport in the channel, and the rightmost peak is due to proton transport in the cathode catalyst layer. The second, third, and fourth peaks exhibit oxygen transport in the GDL, faradaic reactions on the cathode side, and oxygen transport in the catalyst layer, respectively.Andrei KulikovskyFrontiers Media S.A.articlePEM fuel cellimpedanceGDLmodelingdistribution of relaxation times (DRT)General WorksAENFrontiers in Energy Research, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	PEM fuel cell impedance GDL modeling distribution of relaxation times (DRT) General Works A
spellingShingle	PEM fuel cell impedance GDL modeling distribution of relaxation times (DRT) General Works A Andrei Kulikovsky A Kernel for Calculating PEM Fuel Cell Distribution of Relaxation Times
description	Impedance of all oxygen transport processes in PEM fuel cell has negative real part in some frequency domain. A kernel for calculation of distribution of relaxation times (DRT) of a PEM fuel cell is suggested. The kernel is designed for capturing impedance with negative real part and it stems from the equation for impedance of oxygen transport through the gas-diffusion transport layer (doi:10.1149/2.0911509jes). Using recent analytical solution for the cell impedance, it is shown that DRT calculated with the novel K2 kernel correctly captures the GDL transport peak, whereas the classic DRT based on the RC-circuit (Debye) kernel misses this peak. Using K2 kernel, analysis of DRT spectra of a real PEMFC is performed. The leftmost on the frequency scale DRT peak represents oxygen transport in the channel, and the rightmost peak is due to proton transport in the cathode catalyst layer. The second, third, and fourth peaks exhibit oxygen transport in the GDL, faradaic reactions on the cathode side, and oxygen transport in the catalyst layer, respectively.
format	article
author	Andrei Kulikovsky
author_facet	Andrei Kulikovsky
author_sort	Andrei Kulikovsky
title	A Kernel for Calculating PEM Fuel Cell Distribution of Relaxation Times
title_short	A Kernel for Calculating PEM Fuel Cell Distribution of Relaxation Times
title_full	A Kernel for Calculating PEM Fuel Cell Distribution of Relaxation Times
title_fullStr	A Kernel for Calculating PEM Fuel Cell Distribution of Relaxation Times
title_full_unstemmed	A Kernel for Calculating PEM Fuel Cell Distribution of Relaxation Times
title_sort	kernel for calculating pem fuel cell distribution of relaxation times
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/366afd20917a45049478621324042e52
work_keys_str_mv	AT andreikulikovsky akernelforcalculatingpemfuelcelldistributionofrelaxationtimes AT andreikulikovsky kernelforcalculatingpemfuelcelldistributionofrelaxationtimes
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A Kernel for Calculating PEM Fuel Cell Distribution of Relaxation Times

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