期刊
RENEWABLE ENERGY
卷 190, 期 -, 页码 959-970出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2022.04.015
关键词
Proton-exchange-membrane fuel cell (PEMFC); Gas diffusion layer (GDL); Membrane electrode assembly (MEA); Carbon corrosion; Capillary pressure gradient
资金
- KOSEF/SNU-IAMD
- the Industrial Strategic Technology Development Program - Development of high durability, high rigid gas diffusion layer for medium and large commercial vehicles - Ministry of Trade, Industry & Energy (MOTIE, Korea) [20011688]
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [NRF-2019R1A4A1025848]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20011688] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study systematically investigates the carbon corrosion phenomenon and performance degradation using two durability evaluation methods, and quantitatively investigates the causes of performance degradation of corroded GDL.
A gas diffusion layer (GDL) isa major component that facilitates the discharge of generated water and the diffusion of reactant gases in the proton-exchange-membrane fuel cell (PEMFC). However, the GDL is composed of carbon materials, and therefore, it is vulnerable to carbon corrosion. When the PEMFC is at start-up or shutdown, a reduction reaction is induced where a temporary hydrogen shortage phenom-enon occurs in the anode region caused by the air flowing into the gaps of the fuel cell stacks from the outside and from the oxygen crossover through the membrane. This phenomenon induces the reaction of carbon and water at the cathode, and eventually, carbon materials are corroded by an oxidation reaction. In this study, two durability evaluation methods for inducing carbon corrosion are applied to investigate the carbon corrosion phenomenon and performance degradation systematically. The effects of the corroded GDL and corroded membrane electrode assembly on the PEMFC performance are indepen-dently identified, and the causes of performance degradation of the corroded GDL are quantitatively investigated.(c) 2022 Published by Elsevier Ltd.
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