Advancements in ordered membrane electrode assembly (MEA) for water electrolysis

IF 7.9 2区化学 Q1 CHEMISTRY, PHYSICAL Current Opinion in Electrochemistry Pub Date : 2024-10-02 DOI:10.1016/j.coelec.2024.101595

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Abstract

Proton exchange membrane (PEM) and anion exchange membrane (AEM) water electrolyzers exhibit superior efficiency and produce higher purity hydrogen compared to traditional alkaline water electrolyzers due to their membrane electrode assembly (MEA) design. However, random structures presented in current MEA designs introduce significant transport resistance for electrons and mass (ion, gas and liquid), consequently degrading the overall performance of electrolyzes. In contrast, ordered MEA structures are characterized by well-defined arrangements of pores, channels or pathways within catalyst layers (CLs), porous transport layers (PTLs), and ion exchange membranes (IEMs). These ordered configurations facilitate efficient highways for the transfer of electrons and mass. Recent diverse ordered MEA designs have demonstrated significant improvements in overall electrochemical efficiency in both PEM and AEM water electrolyzers. In this review, we will examine recent advancements in ordered MEA designs for water electrolyzers focusing on innovations in fabrication methods and interface morphologies, as well as their electrolysis performance. This review may provide comprehensive guidelines for designing ordered MEAs for both PEM and AEM electrolyzers.

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用于电解水的有序膜电极组件 (MEA) 取得进展

与传统的碱性水电解槽相比，质子交换膜（PEM）和阴离子交换膜（AEM）水电解槽因其膜电极组件（MEA）设计而表现出更高的效率，并能产生纯度更高的氢气。然而，目前 MEA 设计中的随机结构为电子和质量（离子、气体和液体）带来了巨大的传输阻力，从而降低了电解槽的整体性能。与此相反，有序 MEA 结构的特点是催化剂层 (CL)、多孔传输层 (PTL) 和离子交换膜 (IEM) 中的孔隙、通道或通路排列整齐。这些有序配置为电子和质量的高效传输提供了便利。最近的各种有序 MEA 设计表明，PEM 和 AEM 水电解槽的整体电化学效率有了显著提高。在本综述中，我们将探讨水电解槽有序 MEA 设计的最新进展，重点关注制造方法和界面形态的创新及其电解性能。本综述可为 PEM 和 AEM 电解槽有序 MEA 的设计提供全面指导。

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来源期刊

Current Opinion in Electrochemistry Chemistry-Analytical Chemistry

CiteScore

14.00

自引率

5.90%

发文量

272

审稿时长

73 days

期刊介绍： The development of the Current Opinion journals stemmed from the acknowledgment of the growing challenge for specialists to stay abreast of the expanding volume of information within their field. In Current Opinion in Electrochemistry, they help the reader by providing in a systematic manner: 1.The views of experts on current advances in electrochemistry in a clear and readable form. 2.Evaluations of the most interesting papers, annotated by experts, from the great wealth of original publications. In the realm of electrochemistry, the subject is divided into 12 themed sections, with each section undergoing an annual review cycle: • Bioelectrochemistry • Electrocatalysis • Electrochemical Materials and Engineering • Energy Storage: Batteries and Supercapacitors • Energy Transformation • Environmental Electrochemistry • Fundamental & Theoretical Electrochemistry • Innovative Methods in Electrochemistry • Organic & Molecular Electrochemistry • Physical & Nano-Electrochemistry • Sensors & Bio-sensors •