Structural Design and Performance Optimization of Proton Exchange Membranes for Water Electrolysis: A Review
Yi Chen, Hongyang Ma, Benjamin S. Hsiao
TL;DR
This review explores how to design better proton exchange membranes for water electrolysis by balancing conductivity and stability.
Contribution
The paper provides a comprehensive theoretical framework for the rational design of high-performance proton exchange membranes.
Findings
The review establishes structure–performance relationships for proton exchange membranes.
Composite strategies with organic and inorganic materials improve membrane performance.
Design principles for fluorinated and non-fluorinated membranes are systematically illustrated.
Abstract
The trade-off between the ionic conductivity and the stability of the proton exchange membrane (PEM) is a major concern in the development of PEM water electrolysis (PEMWE). This review focuses on the design and fabrication of homogeneous and composite PEMs for water electrolysis and establishes the structure–performance relationships between the membrane chemical/physical structures and their efficiency metrics—specifically, proton conductivity, hydrogen permeability, and chemical and mechanical stability. A special focus is placed on the fundamental connection between the microstructure and performance of membrane materials. At the molecular level, we systematically illustrate the design principles for main chains, side chains, and sulfonate groups, covering both fluorinated PEMs (encompassing perfluorinated and partially fluorinated membranes) and non-fluorinated PEMs (including…
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Taxonomy
TopicsFuel Cells and Related Materials · Hybrid Renewable Energy Systems · Membrane Separation and Gas Transport