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<p>Anion exchange membrane water electrolyzers present a promising approach to cost-effective green H<sub>2</sub> generation, whereas integration of alkaline media and dry-cathode conditions intrinsically forbids adequate H<sub>2</sub>O/OH<sup>-</sup> conduction for efficient operation at high current densities. Herein, we develop a quinuclidinium-functionalized membrane possessing a modulated nano-porous architecture, and exploit its synergy with regulated configuration featuring an anode-to-cathode pressure gradient. By facilitating H<sub>2</sub>O permeation across interconnected hydrophilic nano-channels, a performance of 11.2 A·cm<sup>−2</sup> at 2 V and 90 °C is realized using a NiFe anode, while sufficient membrane robustness and durability enable 2000 h operation at 1 A·cm<sup>−2</sup> with suppressed decay of &lt;1 μV·h<sup>−1</sup>. The narrowed (1-2 nm) gas avenues coordinate with applied pressure gradient to mitigate H<sub>2</sub> crossover, improving adaptability to various static-dynamic scenarios. An encouraging levelized cost of H<sub>2</sub> of 1.8 $·kg<sup>−1</sup> unveils the promise for up-scaled deployment, and this proposed membrane-condition collaboration advances to innovate next-generation energy technologies.</p>

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Anode-pressurized water electrolysis with modulated anion exchange membrane architecture

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月14日

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  • Weizhe Zhang,
  • Tao Wang,
  • Yuhang Zhuo,
  • Shuang Li,
  • Jixin Shi,
  • Haibing Wei,
  • Weiran Lin,
  • Yixiang Shi,
  • Xinhua Wan,
  • Ningsheng Cai,
  • Bo Wang

摘要

Anion exchange membrane water electrolyzers present a promising approach to cost-effective green H2 generation, whereas integration of alkaline media and dry-cathode conditions intrinsically forbids adequate H2O/OH- conduction for efficient operation at high current densities. Herein, we develop a quinuclidinium-functionalized membrane possessing a modulated nano-porous architecture, and exploit its synergy with regulated configuration featuring an anode-to-cathode pressure gradient. By facilitating H2O permeation across interconnected hydrophilic nano-channels, a performance of 11.2 A·cm−2 at 2 V and 90 °C is realized using a NiFe anode, while sufficient membrane robustness and durability enable 2000 h operation at 1 A·cm−2 with suppressed decay of <1 μV·h−1. The narrowed (1-2 nm) gas avenues coordinate with applied pressure gradient to mitigate H2 crossover, improving adaptability to various static-dynamic scenarios. An encouraging levelized cost of H2 of 1.8 $·kg−1 unveils the promise for up-scaled deployment, and this proposed membrane-condition collaboration advances to innovate next-generation energy technologies.