Journal of Power Sources, volume 505, pages 230059

Effect of catalyst layer microstructures on performance and stability for high temperature polymer electrolyte membrane fuel cells

Publication typeJournal Article
Publication date2021-09-01
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor9.2
ISSN03787753
Physical and Theoretical Chemistry
Electrical and Electronic Engineering
Energy Engineering and Power Technology
Renewable Energy, Sustainability and the Environment
Abstract
The microstructures of catalyst layers (CLs) provide the paths for phosphoric acid (PA) invasion and decide the amount and distribution of PA in CLs, which is essential to improve the performance and stability of high temperature polymer electrolyte membrane fuel cells (HT-PEMFCs). In this work, the CLs with different microstructures are constructed and the effects of Pt loading on the performance and degradation of HT-PEMFCs are studied. The results show the CLs with flat surface slow down the process of PA invasion and well-developed pore structures promote the redistribution of PA, which results in low mass transfer resistance. Therefore, the peak power density of HT-PEMFC based on CLs prepared by ultrasonic-spraying is 1.4 times than that by screen-printing, while the performance degradation is only 11% after accelerated stress test of 30,000 cycles with the Pt loading of 0.5 mg cm −2 . Distribution of relaxation times analysis is used to assist the electrochemical impedance spectroscopy to further distinguish the different physicochemical process within cells. The result reveals that mass transfer is affected greatly by the effects of microstructures and Pt loadings, and gets deterioration gradually with the invasion of PA into CLs, which not only makes Pt particle growth but decreases kinetics of oxygen reduction reaction. • Understanding the impact of electrode microstructures on Pt utilization. • Distribution of relaxation times analyses were performed to identify loss processes. • Analysis of loss processes dependencies on electrode microstructures, Pt loading. • The deterioration of mass transfer leads to performance degradation.

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GOST Copy
Zhang J. et al. Effect of catalyst layer microstructures on performance and stability for high temperature polymer electrolyte membrane fuel cells // Journal of Power Sources. 2021. Vol. 505. p. 230059.
GOST all authors (up to 50) Copy
Zhang J., Wang H., Li W., Zhang J., Lu D., Yan W., Xiang Y., Lu S. Effect of catalyst layer microstructures on performance and stability for high temperature polymer electrolyte membrane fuel cells // Journal of Power Sources. 2021. Vol. 505. p. 230059.
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RIS Copy
TY - JOUR
DO - 10.1016/j.jpowsour.2021.230059
UR - https://doi.org/10.1016/j.jpowsour.2021.230059
TI - Effect of catalyst layer microstructures on performance and stability for high temperature polymer electrolyte membrane fuel cells
T2 - Journal of Power Sources
AU - Zhang, Jujia
AU - Wang, Haining
AU - Li, Wen
AU - Zhang, Jin
AU - Lu, Di
AU - Yan, Wenrui
AU - Xiang, Yan
AU - Lu, Shanfu
PY - 2021
DA - 2021/09/01 00:00:00
PB - Elsevier
SP - 230059
VL - 505
SN - 0378-7753
ER -
BibTex
Cite this
BibTex Copy
@article{2021_Zhang,
author = {Jujia Zhang and Haining Wang and Wen Li and Jin Zhang and Di Lu and Wenrui Yan and Yan Xiang and Shanfu Lu},
title = {Effect of catalyst layer microstructures on performance and stability for high temperature polymer electrolyte membrane fuel cells},
journal = {Journal of Power Sources},
year = {2021},
volume = {505},
publisher = {Elsevier},
month = {sep},
url = {https://doi.org/10.1016/j.jpowsour.2021.230059},
pages = {230059},
doi = {10.1016/j.jpowsour.2021.230059}
}
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