Optimization strategies for the mechanical properties of anion exchange membranes applied in new energy devices

IF 6.3 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2025-04-08 DOI:10.1016/j.polymdegradstab.2025.111368

Limin Zhang, Yanyan Guo, Chunlin Wang, Boran Shi, Sizhe Li, Shuqi Li, Jie Yang, Lei Liu, Chao Wang

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引用次数: 0

Abstract

Anion exchange membranes (AEMs) play a pivotal role in the fields of energy and environmental science, where their mechanical properties significantly influence the performance and longevity of energy storage and conversion systems. Enhancing these properties is crucial for maintaining dimensional stability under high-pressure corrosive conditions and ensuring long-term reliability in battery applications. Common strategies to optimize mechanical properties include constructing microphase-separated network structures and implementing cross-linking models. The former leverages side-chain cation self-assembly to form microphase-separated networks, thereby enhancing alkalinity and mechanical stability. The latter benefits from a tightly interconnected polymer backbone due to cross-linking, which restricts chain mobility and improves dimensional stability. Additionally, interpenetrating structures, increased crystallinity, and controlled chain orientation can further optimize mechanical properties. For instance, pi-pi stacking self-assembly, external field induction, or machining techniques, among other methods.

From a molecular perspective, the regulation of membrane materials can be categorized into segment entanglement structure design and orientation control. The alignment of polymer chains and the degree of "interlocking" within the network are influenced by various factors, altering internal free volume and intermolecular interaction energies, thus impacting macroscopic properties. However, a comprehensive summary of how polymer segment structure and orientation affect mechanical properties in AEMs remains limited. This paper aims to analyze the relationship between structure and mechanical properties and discuss design principles to provide guidance for the development of new energy devices.

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.