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Hydrophilic Treatment Methods for Porous Transport Layers on Bubble Management and Electrolysis Performance in Proton Exchange Membrane Water Electrolyzer.

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Title: Hydrophilic Treatment Methods for Porous Transport Layers on Bubble Management and Electrolysis Performance in Proton Exchange Membrane Water Electrolyzer.
Authors: Bao, Xuezhi1 (AUTHOR), Huang, Bo1,2 (AUTHOR) shxu16@sues.edu.cn, Wang, Ziqing2,3 (AUTHOR), Zhao, Luhaibo3,4 (AUTHOR) wanggl@sari.ac.cn, Wu, Haibo1,4 (AUTHOR), Xu, Shen1,2 (AUTHOR), Wang, Guoliang3 (AUTHOR), Tang, Zhiyong3,4 (AUTHOR)
Source: Energies (19961073). May2026, Vol. 19 Issue 9, p2107. 18p.
Subject Terms: *Hydrophilic surfaces, *Bubble dynamics, *Titanium, *Electrolysis, *Porous materials, *Ion-permeable membranes, *Overpotential
Abstract: The hydrophilicity of the porous transport layer (PTL) critically influences the mass transport overpotential and overall efficiency of a proton exchange membrane water electrolyzer (PEMWE). In this study, titanium felts with three distinct levels of hydrophilicity are systematically characterized and evaluated electrochemically. A novel bilayer gradient hydrophilic titanium felt structure is designed, resulting in notable performance improvements: the average cell voltage decreases by 12.92%, and the overpotential is reduced by 9.94–18.03% across a current density range of 0.1–1.6 A·cm−2. High-speed imaging reveals that the gradient hydrophilic structure effectively regulates bubble dynamics, nearly eliminating annular flow bubbles, reducing the proportion of slug flow bubbles by 40.78%, decreasing the bubble detachment diameter by 28.26%, and enhancing bubble displacement by 51.03% compared to that of untreated titanium felt. These results demonstrate that gradient hydrophilic structures can significantly enhance PEMWE performance, offering a promising strategy and a theoretical foundation for optimizing mass transfer in electrolytic systems. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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  Availability: 1
Header DbId: enr
DbLabel: Energy & Power Source
An: 193716003
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Hydrophilic Treatment Methods for Porous Transport Layers on Bubble Management and Electrolysis Performance in Proton Exchange Membrane Water Electrolyzer.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Bao%2C+Xuezhi%22">Bao, Xuezhi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Bo%22">Huang, Bo</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> shxu16@sues.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Ziqing%22">Wang, Ziqing</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Luhaibo%22">Zhao, Luhaibo</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<i> wanggl@sari.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Wu%2C+Haibo%22">Wu, Haibo</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Shen%22">Xu, Shen</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Guoliang%22">Wang, Guoliang</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tang%2C+Zhiyong%22">Tang, Zhiyong</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. May2026, Vol. 19 Issue 9, p2107. 18p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Hydrophilic+surfaces%22">Hydrophilic surfaces</searchLink><br />*<searchLink fieldCode="DE" term="%22Bubble+dynamics%22">Bubble dynamics</searchLink><br />*<searchLink fieldCode="DE" term="%22Titanium%22">Titanium</searchLink><br />*<searchLink fieldCode="DE" term="%22Electrolysis%22">Electrolysis</searchLink><br />*<searchLink fieldCode="DE" term="%22Porous+materials%22">Porous materials</searchLink><br />*<searchLink fieldCode="DE" term="%22Ion-permeable+membranes%22">Ion-permeable membranes</searchLink><br />*<searchLink fieldCode="DE" term="%22Overpotential%22">Overpotential</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The hydrophilicity of the porous transport layer (PTL) critically influences the mass transport overpotential and overall efficiency of a proton exchange membrane water electrolyzer (PEMWE). In this study, titanium felts with three distinct levels of hydrophilicity are systematically characterized and evaluated electrochemically. A novel bilayer gradient hydrophilic titanium felt structure is designed, resulting in notable performance improvements: the average cell voltage decreases by 12.92%, and the overpotential is reduced by 9.94–18.03% across a current density range of 0.1–1.6 A·cm−2. High-speed imaging reveals that the gradient hydrophilic structure effectively regulates bubble dynamics, nearly eliminating annular flow bubbles, reducing the proportion of slug flow bubbles by 40.78%, decreasing the bubble detachment diameter by 28.26%, and enhancing bubble displacement by 51.03% compared to that of untreated titanium felt. These results demonstrate that gradient hydrophilic structures can significantly enhance PEMWE performance, offering a promising strategy and a theoretical foundation for optimizing mass transfer in electrolytic systems. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/en19092107
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 18
        StartPage: 2107
    Subjects:
      – SubjectFull: Hydrophilic surfaces
        Type: general
      – SubjectFull: Bubble dynamics
        Type: general
      – SubjectFull: Titanium
        Type: general
      – SubjectFull: Electrolysis
        Type: general
      – SubjectFull: Porous materials
        Type: general
      – SubjectFull: Ion-permeable membranes
        Type: general
      – SubjectFull: Overpotential
        Type: general
    Titles:
      – TitleFull: Hydrophilic Treatment Methods for Porous Transport Layers on Bubble Management and Electrolysis Performance in Proton Exchange Membrane Water Electrolyzer.
        Type: main
  BibRelationships:
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      – PersonEntity:
          Name:
            NameFull: Bao, Xuezhi
      – PersonEntity:
          Name:
            NameFull: Huang, Bo
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            NameFull: Wang, Ziqing
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            NameFull: Zhao, Luhaibo
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            NameFull: Wu, Haibo
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            NameFull: Xu, Shen
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          Name:
            NameFull: Wang, Guoliang
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            NameFull: Tang, Zhiyong
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 19961073
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            – Type: volume
              Value: 19
            – Type: issue
              Value: 9
          Titles:
            – TitleFull: Energies (19961073)
              Type: main
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