Electro-chemo-mechanical induced fracture modeling in proton exchange membrane water electrolysis for sustainable hydrogen production


Aldakheel F., Kandekar C., Bensmann B., DAL H., Hanke-Rauschenbach R.

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, vol.400, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 400
  • Publication Date: 2022
  • Doi Number: 10.1016/j.cma.2022.115580
  • Journal Name: COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Computer & Applied Sciences, INSPEC, MathSciNet, Metadex, zbMATH, Civil Engineering Abstracts
  • Keywords: Sustainable hydrogen production, Proton exchange membrane water electrolysis (PEMWE), Catalyst coated membrane (CCM), Porous transport layer (PTL), Multi-physics problem, Experimental observations, PHASE-FIELD FRACTURE, CAHN-HILLIARD-TYPE, VARIATIONAL-PRINCIPLES, TRANSPORT, PERFORMANCE, FORMULATION, SIMULATION, DEGRADATION, PROPAGATION, DIFFUSION
  • Middle East Technical University Affiliated: No

Abstract

This work provides a framework for predicting fracture of catalyst coated membrane (CCM) due to coupled electro-chemo-mechanical degradation processes in proton exchange membrane water electrolysis (PEMWE) cells. Electrolysis in the catalyst layer (CL) bulk, diffusion of Hydrogen proton through the membrane (MEM), and mechanical compression at the interface with the porous transport layer (PTL) generate micro-cracks that influence the catalyst degradation. Based on our experimental observations, we propose a new theoretical formulations along with the constitutive framework to help understanding and providing a reliable description of the stated multi-physics problem. The computational modeling of crack formation in the CL bulk is achieved in a convenient way by continuum phase-field formulations to fracture, which are based on the regularization of sharp crack discontinuities. The model performance is demonstrated through two representative boundary value problems, representing the cell setup and working of the PEMWE cell.(c) 2022 Elsevier B.V. All rights reserved.