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<p>The design of the flow channel of the bipolar plate, a crucial component of the proton exchange membrane fuel cell(PEMFC), has a direct impact on the fuel cell’s ability to dissipate heat, remove water, and diffuse gases. This study introduces three hierarchical honeycomb bionic flow fields(HBFFs) with subchannels. Numerical simulations demonstrate their superiority over conventional designs: current density increased by 3.82%, 6.31%, and 7.01%, while peak power density rose by 3.82%, 6.58%, and 7.42% for HBFF-1/2/3 flow fields structure, respectively. The optimized honeycomb bionic flow fields enhance water removal and ensure uniform reactant distribution. Additionally, the study looked at how different subchannel widths impact PEMFC performance. Parametric analysis identifies 0.5&#xa0;mm subchannel width in HBFF-3 as optimal, achieving 7.96% higher current density and 8.57% greater peak power density versus HBFF-0. Subchannel height reduction via blocking structures further elevates performance without compromising water management.</p> Graphical abstract <p></p>

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Optimization and performance study of honeycomb bionic flow channel structure for proton exchange membrane fuel cells

  • 期刊论文

  • 发表日期：

    2025年11月22日

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  • Yingying Xiong,
  • Linbin Li,
  • Yu Niu,
  • Zhixin Zhai,
  • Zhiqian Wang,
  • Yuqi Wang

摘要

The design of the flow channel of the bipolar plate, a crucial component of the proton exchange membrane fuel cell(PEMFC), has a direct impact on the fuel cell’s ability to dissipate heat, remove water, and diffuse gases. This study introduces three hierarchical honeycomb bionic flow fields(HBFFs) with subchannels. Numerical simulations demonstrate their superiority over conventional designs: current density increased by 3.82%, 6.31%, and 7.01%, while peak power density rose by 3.82%, 6.58%, and 7.42% for HBFF-1/2/3 flow fields structure, respectively. The optimized honeycomb bionic flow fields enhance water removal and ensure uniform reactant distribution. Additionally, the study looked at how different subchannel widths impact PEMFC performance. Parametric analysis identifies 0.5 mm subchannel width in HBFF-3 as optimal, achieving 7.96% higher current density and 8.57% greater peak power density versus HBFF-0. Subchannel height reduction via blocking structures further elevates performance without compromising water management.

Graphical abstract