Local performance response behavior during liquid water transport of a hydrogen–oxygen proton exchange membrane fuel cell: An experimental investigation

Meng, Kai; Zhou, Heng; Yang, Guanghua; Chen, Wenshang; Chen, Ben

doi:10.1016/j.enconman.2023.117510

Cited by 5 publications

(2 citation statements)

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“…If the generated water cannot be discharged in a timely manner, the excess water will result in the water flooding within the electrode, block the reaction site, and hinder gas transport to the reaction interface, leading to a degradation in cell performance. 33 Therefore, it is urgent to develop an innovative structure that can remove the liquid water of the three-phase reaction zone efficiently and easily and then improve the mass transfer performance of fuel cells.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…After a PEMFC single cell operates in a high-humidity environment for a long time, the product water of electrochemical reactions will continuously generate and condense at the three-phase reaction interface, as presented in the top area of Figure . If the generated water cannot be discharged in a timely manner, the excess water will result in the water flooding within the electrode, block the reaction site, and hinder gas transport to the reaction interface, leading to a degradation in cell performance . Therefore, it is urgent to develop an innovative structure that can remove the liquid water of the three-phase reaction zone efficiently and easily and then improve the mass transfer performance of fuel cells.…”

Section: Resultsmentioning

confidence: 99%

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Graded Structure Design of the Microporous Layer for Improving the Mass Transfer Performance of Proton-Exchange Membrane Fuel Cells

Wang,

2024

ACS Sustainable Chem. Eng.

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The microporous layer (MPL) in membrane electrodes is critical for mass transfer in proton-exchange membrane fuel cells (PEMFCs). The mass transfer loss in electrodes is very serious when operating in high-current-density and high-humidity environments, which greatly reduces the output performance and durability of fuel cells. To address these challenges, we designed an MPL with a graded pore structure. By controlling the content of the pore former in the MPL slurry, conventional MPLs with uniform pores are constructed, and then structural MPL with ordered gradient pore distribution is formed through layered coating and sintering. The capillary driving force provided by such a gradient structure can effectively improve the cathode water management capability. In this study, the MPL with the graded pore structure (G-MPL) shows the highest output performance of 2.28 W cm–2 at a high relative humidity of 100%. This is mainly due to its gradient pore structure, which significantly facilitates water discharge and gas diffusion, thereby upgrading the mass transfer capacity of fuel cells. In addition to its outstanding electrochemical performance, G-MPL also has the advantages of low production cost and a simplified preparation process, making it an exceptional candidate to promote the practical application of PEMFCs.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%