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http://hdl.handle.net/10397/94151
Title: | Optimization of catalyst layer thickness for achieving high performance and low cost of high temperature proton exchange membrane fuel cell | Authors: | Xia, L Ni, M Xu, Q Xu, H Zheng, K |
Issue Date: | Jul-2021 | Source: | Applied energy, July 2021, v. 294, 117012 | Abstract: | The thickness of catalyst layer (CL) determines the electrochemical performance and the cost of high temperature proton exchange membrane fuel cell (HT-PEMFC). However, various values (e.g. 100 μm, 50 μm, 10 μm) of CL thickness are reported in the previous studies. To identify the optimal CL thickness to reduce the PEMFC cost without sacrificing the electrochemical performance, it is necessary to first identify the effective reaction thickness (ERT) of both anode and cathode. A numerical non-isothermal 3D model was developed considering the activation loss, concentration loss and ohmic loss at two electrodes, respectively. After model validation, parametric analyses were performed to investigate the effects of temperature, working voltage and flow rate on the performance of the fuel cell, especially on ERT. It is found that the ERT increases with increasing temperature. The working voltage and the cathode flow rate have opposite influences on the ERT of the two electrodes. The ERT highly depends on the ratio of activation loss and concentration loss (ηact+ηconc) to ohmic loss ηohmic. Considering the utilization rate of the catalyst and cell performance, the appropriate CL thicknesses for anode and cathode electrode are 10–17 μm and 15–30 μm, respectively. This study clearly demonstrates that we can reduce the CL cost and maintain high fuel cell performance by carefully controlling the thickness of CL. | Keywords: | Active reaction thickness Effective reaction area HT-PEMFC Potential loss ratio |
Publisher: | Pergamon Press | Journal: | Applied energy | ISSN: | 0306-2619 | EISSN: | 1872-9118 | DOI: | 10.1016/j.apenergy.2021.117012 | Rights: | © 2021 Elsevier Ltd. All rights reserved. © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ The following publication Xia, L., Ni, M., Xu, Q., Xu, H., & Zheng, K. (2021). Optimization of catalyst layer thickness for achieving high performance and low cost of high temperature proton exchange membrane fuel cell. Applied Energy, 294, 117012 is available at https://doi.org/10.1016/j.apenergy.2021.117012. |
Appears in Collections: | Journal/Magazine Article |
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Xia_Optimization_Catalyst_Proton.pdf | Pre-Published version | 2.39 MB | Adobe PDF | View/Open |
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