1900

Voltammetric and Galvanostatic Methods for Measuring Hydrogen Crossover in Fuel Cell

Abstract

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.

Funding source: This work was supported by National Key Research and Development Program of China (Funding Number: 2019YFB1504605, 2017YFB0103105, 2018YFB0106502).
Related subjects: Applications & Pathways
Loading

Article metrics loading...

/content/journal2896
2021-12-03
2022-12-04
http://instance.metastore.ingenta.com/content/journal2896
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error