Porous transport electrode with patterned surface
Laser-structured porous transport electrodes with periodic surface structures address the inefficiencies in proton or anion exchange membrane water electrolysers by increasing surface area and improving bubble removal, leading to enhanced reaction efficiency and performance.
WO2026114755A1PCT designated stage Publication Date: 2026-06-04NV BEKAERT SA
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- NV BEKAERT SA
- Filing Date
- 2025-11-21
- Publication Date
- 2026-06-04
AI Technical Summary
Technical Problem
Proton or anion exchange membrane water electrolysers face efficiency limitations due to the sluggish oxygen evolution reaction and the blocking of active sites by oxygen gas bubbles, which hinder water transport and overall performance.
Method used
A porous transport layer substrate is laser-structured with laser-induced periodic surface structures comprising grooves alternating with hills, formed using femtosecond laser pulses, to increase surface area and enhance water and gas transport, while minimizing material loss.
Benefits of technology
The structured substrate with a patterned surface provides efficient oxygen bubble removal and improved catalytic activity, enhancing the efficiency of the oxygen evolution reaction and overall electrolyser performance.
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Smart Images
Figure EP2025083786_04062026_PF_FP_ABST
Abstract
Porous transport electrode with patterned surface A method for increasing a surface area of a porous transport layer substrate (22, 32) for an electrolyser device (7), comprising laser structuring the porous transport layer substrate (22, 32) using a pulsed laser so as to pattern said porous transport layer substrate (22, 32) with laser-induced periodic surface structures comprising grooves (82) alternating with hills (81), wherein a ratio of a full width at half maximum (810) of the hills (81) to a full width at half maximum (820) of the grooves (82) is at most 4, preferably at most 2, more preferably at most 0.5.
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