Cargando…
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...
Autores principales: | , , , , |
---|---|
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 |
_version_ | 1784619050608885760 |
---|---|
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. |
format | Online Article Text |
id | pubmed-8692992 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT lisida voltammetricandgalvanostaticmethodsformeasuringhydrogencrossoverinfuelcell AT weixuezhe voltammetricandgalvanostaticmethodsformeasuringhydrogencrossoverinfuelcell AT daihaifeng voltammetricandgalvanostaticmethodsformeasuringhydrogencrossoverinfuelcell AT yuanhao voltammetricandgalvanostaticmethodsformeasuringhydrogencrossoverinfuelcell AT mingpingwen voltammetricandgalvanostaticmethodsformeasuringhydrogencrossoverinfuelcell |