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Investigation of phosphoric acid and water transport in the high temperature proton exchange membrane fuel cells
  • +2
  • Mu Sun,
  • Jicai Huang,
  • Zhangxun Xia,
  • Suli Wang,
  • Gongquan Sun
Mu Sun
Dalian Institute of Chemical Physics

Corresponding Author:[email protected]

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Jicai Huang
Dalian Institute of Chemical Physics
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Zhangxun Xia
Dalian Institute of Chemical Physics
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Suli Wang
Chinese Academy of Sciences
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Gongquan Sun
Dalian Institute of Chemical Physics, Chinese Academy of Sciences
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Abstract

A three-dimensional, non-isothermal and multiphase model of high temperature proton exchange membrane fuel cells is built to investigate water and phosphoric acid transportation, in which a spherical agglomerate model considering catalyst layer structure and liquid phase fraction is applied to determine the electrochemical kinetics in the cathode catalyst layer. Experimental polarization curve, water proportion in the anode outlet gas and phosphoric acid distribution are selected for validation. It is found that the simulated results can represent the experimental data with reasonable accuracy. Based on the model, the effects of current density and stoichiometry on the variable distributions are analyzed. The results show that water in anode is mainly from cathode by concentration diffusion of liquid water. A higher current density leads to a greater electro-migration of phosphoric acid from cathode to anode and a higher liquid phase fraction in anode,while a lower phosphoric acid concentration in the fuel cells.
09 Nov 2021Submitted to AIChE Journal
09 Nov 2021Submission Checks Completed
09 Nov 2021Assigned to Editor
14 Nov 2021Reviewer(s) Assigned
15 Jan 2022Editorial Decision: Revise Major
09 Feb 20221st Revision Received
10 Feb 2022Submission Checks Completed
10 Feb 2022Assigned to Editor
13 Feb 2022Reviewer(s) Assigned
21 Mar 2022Editorial Decision: Accept