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Unraveling the cohesive and interfacial adhesive strengths of electrodes for automotive fuel cells

Title
Unraveling the cohesive and interfacial adhesive strengths of electrodes for automotive fuel cells
Authors
Byun, SeoungwooYu, Jung-HanChoi, JaecheolYun, SukhwanRoh, YoungjoonDzakpasu, Cyril BubuPark, Sun HoOh, Jong-GilHong, Bo KiLee, Yong Min
DGIST Authors
Byun, Seoungwoo; Yu, Jung-Han; Choi, Jaecheol; Yun, Sukhwan; Roh, Youngjoon; Dzakpasu, Cyril Bubu; Park, Sun Ho; Oh, Jong-Gil; Hong, Bo Ki; Lee, Yong Min
Issue Date
2020-04
Citation
Journal of Power Sources, 455, 227928
Type
Article
Article Type
Article
Author Keywords
Cohesive and adhesive strengthsIonomer bindersMembrane electrode assembliesSAICASPolymer electrolyte membrane fuel cells
Keywords
DECAL TRANSFER METHODCOLD STARTCATALYST LAYERMEMBRANEBEHAVIORDEGRADATIONPERFORMANCEHYDROGENFABRICATIONPLATINUM
ISSN
0378-7753
Abstract
Despite the pressing need to develop highly durable electrodes for electric vehicles powered by polymer electrolyte membrane fuel cells (PEMFCs), evaluating the mechanical robustness of the electrodes in membrane electrode assemblies (MEAs) has proven challenging because the electrodes are intrinsically porous and brittle. Herein, we propose a novel technique for effectively quantifying the mechanical robustness of the electrodes using a surface and interfacial cutting analysis system (SAICAS). The SAICAS enables the separate quantification of cohesion and adhesion of PEMFC electrodes. We find that the adhesion at the interface is higher than the cohesion in the bulk owing to a larger intermolecular diffusion at the interface than in the bulk. Also, the SAICAS could reliably quantify the cohesion and adhesion of PEMFC electrodes having different ionomer contents and assembly temperatures. Our findings are intriguing and will be useful for the efficient and effective design and development of robust electrodes and MEAs. © 2020 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/11704
DOI
10.1016/j.jpowsour.2020.227928
Publisher
Elsevier BV
Related Researcher
  • Author Lee, Yong Min Battery Materials & Systems LAB
  • Research Interests Battery; Electrode; Electrolyte; Separator; Simulation
Files:
There are no files associated with this item.
Collection:
Department of Energy Science and EngineeringBattery Materials & Systems LAB1. Journal Articles


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