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Voltammetric and galvanostatic methods for measuring hydrogen crossover in fuel cell

Hydrogen crossover rate is an important indicator for characterizing the membrane degradation and failure in proton exchange membrane fuel cell. Several electrochemical methods have been applied to quantify it. But most of established methods are too rough to support follow-up applications. In this...

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Detalles Bibliográficos
Autores principales: Li, Sida, Wei, Xuezhe, Dai, Haifeng, Yuan, Hao, Ming, Pingwen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8692992/
https://www.ncbi.nlm.nih.gov/pubmed/34984330
http://dx.doi.org/10.1016/j.isci.2021.103576
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author Li, Sida
Wei, Xuezhe
Dai, Haifeng
Yuan, Hao
Ming, Pingwen
author_facet Li, Sida
Wei, Xuezhe
Dai, Haifeng
Yuan, Hao
Ming, Pingwen
author_sort Li, Sida
collection PubMed
description Hydrogen crossover rate is an important indicator for characterizing the membrane degradation and failure in proton exchange membrane fuel cell. Several electrochemical methods have been applied to quantify it. But most of established methods are too rough to support follow-up applications. In this paper, a systematic and consistent theoretical foundation for electrochemical measurements of hydrogen crossover is established for the first time. Different electrochemical processes occurring throughout the courses of applying potentiostatic or galvanostatic excitations on fuel cell are clarified, and the linear current-voltage behavior observed in the steady-state voltammogram is reinterpreted. On this basis, we propose a modified galvanostatic charging method with high practicality to achieve accurate electrochemical measurement of hydrogen crossover, and the validity of this method is fully verified. This research provides an explicit framework for implementation of galvanostatic charging method and offers deeper insights into the principles of electrochemical methods for measuring hydrogen crossover.
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spelling pubmed-86929922022-01-03 Voltammetric and galvanostatic methods for measuring hydrogen crossover in fuel cell Li, Sida Wei, Xuezhe Dai, Haifeng Yuan, Hao Ming, Pingwen iScience Article Hydrogen crossover rate is an important indicator for characterizing the membrane degradation and failure in proton exchange membrane fuel cell. Several electrochemical methods have been applied to quantify it. But most of established methods are too rough to support follow-up applications. In this paper, a systematic and consistent theoretical foundation for electrochemical measurements of hydrogen crossover is established for the first time. Different electrochemical processes occurring throughout the courses of applying potentiostatic or galvanostatic excitations on fuel cell are clarified, and the linear current-voltage behavior observed in the steady-state voltammogram is reinterpreted. On this basis, we propose a modified galvanostatic charging method with high practicality to achieve accurate electrochemical measurement of hydrogen crossover, and the validity of this method is fully verified. This research provides an explicit framework for implementation of galvanostatic charging method and offers deeper insights into the principles of electrochemical methods for measuring hydrogen crossover. Elsevier 2021-12-07 /pmc/articles/PMC8692992/ /pubmed/34984330 http://dx.doi.org/10.1016/j.isci.2021.103576 Text en © 2021 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Li, Sida
Wei, Xuezhe
Dai, Haifeng
Yuan, Hao
Ming, Pingwen
Voltammetric and galvanostatic methods for measuring hydrogen crossover in fuel cell
title Voltammetric and galvanostatic methods for measuring hydrogen crossover in fuel cell
title_full Voltammetric and galvanostatic methods for measuring hydrogen crossover in fuel cell
title_fullStr Voltammetric and galvanostatic methods for measuring hydrogen crossover in fuel cell
title_full_unstemmed Voltammetric and galvanostatic methods for measuring hydrogen crossover in fuel cell
title_short Voltammetric and galvanostatic methods for measuring hydrogen crossover in fuel cell
title_sort voltammetric and galvanostatic methods for measuring hydrogen crossover in fuel cell
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8692992/
https://www.ncbi.nlm.nih.gov/pubmed/34984330
http://dx.doi.org/10.1016/j.isci.2021.103576
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