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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应用于新能源器件的阴离子交换膜力学性能优化策略

阴离子交换膜（AEMs）在能源和环境科学领域发挥着举足轻重的作用，其力学性能显著影响着储能和转换系统的性能和寿命。增强这些特性对于在高压腐蚀条件下保持尺寸稳定性和确保电池应用的长期可靠性至关重要。优化力学性能的常用策略包括构建微相分离网络结构和实现交联模型。前者利用侧链阳离子自组装形成微相分离网络，从而提高碱度和机械稳定性。后者受益于由于交联而紧密连接的聚合物骨架，这限制了链的迁移率并提高了尺寸稳定性。此外，互穿结构、增加结晶度和控制链取向可以进一步优化机械性能。例如，pi-pi堆叠自组装，外场感应或加工技术等方法。从分子的角度来看，膜材料的调控可分为片段缠结、结构设计和取向控制。聚合物链的排列和网络内的“联锁”程度受到各种因素的影响，改变了内部自由体积和分子间相互作用能，从而影响宏观性能。然而，关于聚合物段结构和取向如何影响AEMs力学性能的综合总结仍然有限。本文旨在分析结构与力学性能之间的关系，探讨设计原则，为新能源装置的发展提供指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.