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Effect of Crown Ether Additives on the Enhanced Performance of Metallic Bipolar Plates for Proton Exchange Membrane Fuel Cells

Title
Effect of Crown Ether Additives on the Enhanced Performance of Metallic Bipolar Plates for Proton Exchange Membrane Fuel Cells
Authors
OhKeun-HwanKimHeejinNamKwan Woo
Ewha Authors
남관우
SCOPUS Author ID
남관우scopus
Issue Date
2024
Journal Title
ACS Applied Materials and Interfaces
ISSN
1944-8244JCR Link
Citation
ACS Applied Materials and Interfaces vol. 16, no. 5, pp. 5725 - 5734
Keywords
corrosion resistancecrown ethermetallic bipolar plateproton-exchange membrane fuel cellrecovery protocol
Publisher
American Chemical Society
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
One of the key components of the fuel cell stack is a metallic bipolar plate (MBP) that plays multiple roles, such as current collector, fuel and oxidant distributor, and mechanical support. However, corrosion and consequent metal elution are major drawbacks of the MBP because they diminish the efficiency and power performance of membrane-electrode assemblies (MEAs). Herein, we show that the crown ether (CE) additive can simultaneously inhibit surface corrosion of the MBP and act as a scavenger for eluted metal ions to alleviate contamination of other components. From the electrochemical measurement, high-resolution imaging, and elemental analysis, we have found that the CE undergoes electrolytic decomposition and makes an efficient protective layer in an in situ manner. This layer prevents direct contact between the MBP and electrolyte as well as the dissolution of metal ions into the electrolyte. In addition, we demonstrate that the CE can improve the recovery protocol of the MEA owing to the formation of host-guest complexes between the CE and metal cations. These results provide key insights into the design of high-performance MBPs for proton-exchange membrane fuel cells. © 2024 American Chemical Society
DOI
10.1021/acsami.3c13530
Appears in Collections:
공과대학 > 화공신소재공학과 > Journal papers
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