Ionomer content effect on charge and gas transport in the cathode catalyst layer of proton-exchange membrane fuel cells

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F21%3A00542168" target="_blank" >RIV/67985891:_____/21:00542168 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/21:10438537 RIV/00216208:11310/21:10438537

Result on the web

<a href="https://www-sciencedirect-com.ezproxy.lib.cas.cz/science/article/pii/S0378775321000793?via%3Dihub" target="_blank" >https://www-sciencedirect-com.ezproxy.lib.cas.cz/science/article/pii/S0378775321000793?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jpowsour.2021.229531" target="_blank" >10.1016/j.jpowsour.2021.229531</a>

Result language

angličtina

Original language name

Ionomer content effect on charge and gas transport in the cathode catalyst layer of proton-exchange membrane fuel cells

Original language description

Proton-exchange membrane fuel cell (PEMFC) performance is strongly related to the complex transport of gas and charge carriers in the cathode catalyst layer. Thus, we investigated the transport properties of catalyst layers at different ionomer/carbon ratios, ranging from 0.1 to 1, focusing on oxygen, proton and electron transport. Oxygen transport was studied using the limiting current technique, separately analyzing the contributions of molecular, Knudsen, and ionomer transport resistances by changing the temperature and gas pressure. The proton and electron resistance of the catalyst layers were determined by impedance spectroscopy and current voltage measurements, respectively. The results showed that the performance of fuel cells can be enhanced by selecting a suitable ionomer/carbon ratio and that increasing the ionomer content decreases the proton resistance and increases the electron resistance of catalyst layers. Accordingly, low oxygen transport and proton resistance at an ionomer/carbon ratio of 0.6 (26.5%wt.) led to the highest fuel cell power density (595 mW cm(-2)). These results fully support well-established in numerous works optimal ionomer content, revealing the underlying mechanisms of high fuel cell performance. Furthermore, the porosimetry results and electron microscopy measurements confirmed that transport properties strongly affect fuel cell performance.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Power Sources

ISSN

0378-7753

e-ISSN

1873-2755

Volume of the periodical

490

Issue of the periodical within the volume

APR 1

Country of publishing house

CH - SWITZERLAND

Number of pages

9

Pages from-to

229531

UT code for WoS article

000621173500003

EID of the result in the Scopus database

2-s2.0-85100386437