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author:

Zhu, Kai-Qi (Zhu, Kai-Qi.) [1] | Ding, Quan (Ding, Quan.) [2] | Xu, Jiang-Hai (Xu, Jiang-Hai.) [3] | Yang, Yan-Ru (Yang, Yan-Ru.) [4] | Yang, Chen (Yang, Chen.) [5] (Scholars:杨臣) | Zhang, Jing (Zhang, Jing.) [6] | Zhang, Yan (Zhang, Yan.) [7] | Huang, Tai-Ming (Huang, Tai-Ming.) [8] | Yan, Wei-Mon (Yan, Wei-Mon.) [9] | Wan, Zhong-Min (Wan, Zhong-Min.) [10] | Wang, Xiao-Dong (Wang, Xiao-Dong.) [11]

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EI

Abstract:

This work proposes a design principle of the optimal thickness for cathode gas diffusion layers (GDLs) of proton exchange membrane fuel cells (PEMFCs) based on a balance of cell performances under both steady-state and load-varying conditions. Using a three-dimensional and two-phase model, the effects of cathode GDL thickness (50, 100, 200, and 400 μm) on steady-state performances and transient response characteristics are studied. The results show that under steady-state conditions, an extremely thin cathode GDL would lead to non-uniform oxygen and liquid water distributions, whereas an especially thick cathode GDL would increase oxygen transport resistance. Thus, there is an optimal cathode GDL thickness, yielding the best steady-state performance. A current overshoot phenomenon, arising from high local oxygen concentrations at cathode catalyst layers (CLs), is observed when the load voltage decreases abruptly. Thinner cathode GDLs would weaken the overshoot and shorten the recovery time of current density. Conversely, low local oxygen concentrations at cathode CLs caused by high liquid water saturation levels lead to a current undershoot phenomenon when the load voltage increases abruptly. Thinner cathode GDLs would strengthen the undershoot but shorten the recovery time of current density. The optimal choice of cathode GDL thickness should weigh up the steady-state and the transient performance. Based on this principle, the optimal cathode GDL thickness is selected as 100 µm. © 2022 Elsevier Ltd

Keyword:

Cathodes Diffusion in gases Oxygen Proton exchange membrane fuel cells (PEMFC) Transient analysis Water supply systems

Community:

  • [ 1 ] [Zhu, Kai-Qi]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing; 102206, China
  • [ 2 ] [Zhu, Kai-Qi]Research Center of Engineering Thermophysics, North China Electric Power University, Beijing; 102206, China
  • [ 3 ] [Ding, Quan]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing; 102206, China
  • [ 4 ] [Ding, Quan]Research Center of Engineering Thermophysics, North China Electric Power University, Beijing; 102206, China
  • [ 5 ] [Xu, Jiang-Hai]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing; 102206, China
  • [ 6 ] [Xu, Jiang-Hai]Research Center of Engineering Thermophysics, North China Electric Power University, Beijing; 102206, China
  • [ 7 ] [Yang, Yan-Ru]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing; 102206, China
  • [ 8 ] [Yang, Yan-Ru]Research Center of Engineering Thermophysics, North China Electric Power University, Beijing; 102206, China
  • [ 9 ] [Yang, Chen]College of Chemical Engineering, Fuzhou University, Fujian, Fuzhou; 350116, China
  • [ 10 ] [Zhang, Jing]College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, Hunan, China
  • [ 11 ] [Zhang, Yan]College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, Hunan, China
  • [ 12 ] [Huang, Tai-Ming]College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, Hunan, China
  • [ 13 ] [Yan, Wei-Mon]Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei; 10608, Taiwan
  • [ 14 ] [Wan, Zhong-Min]College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, Hunan, China
  • [ 15 ] [Wang, Xiao-Dong]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing; 102206, China
  • [ 16 ] [Wang, Xiao-Dong]Research Center of Engineering Thermophysics, North China Electric Power University, Beijing; 102206, China

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Source :

Energy Conversion and Management

ISSN: 0196-8904

Year: 2022

Volume: 267

1 0 . 4

JCR@2022

9 . 9 0 0

JCR@2023

ESI HC Threshold:66

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 22

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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