侧链型高温质子交换膜的制备与性能

目前将微观结构对性能调控的策略应用于高温聚合物电解质膜材料的设计鲜有报道。将锚定磷酸的乙烯基咪唑基团接枝到聚砜上形成极性侧链，促进膜内微观相分离结构的形成（含氮功能基团形成的离子团簇锚定磷酸后为质子的传输提供离子通道，憎水的主链结构构成膜的骨架，维持膜的拉伸强度），降低磷酸分子对高分子主链的影响，从而实现高温膜材料离子导电性能和拉伸强度的双赢。研究侧链长度对膜的微观相分离结构、摩尔自由体积的影响，解析微观相分离结构对HT-PEM宏观性能（质子传导率、拉伸强度等）的影响及规律，阐明侧链型高温聚合物电解质膜的高分子链结构-微观相分离结构-宏观性能的内在联系，最后在高温电池器件中考察膜的电化学行为和放电稳定性。数据量为23.8 MB。

Currently, there are few reports on the application of microstructure-regulation strategies for performance optimization in the design of high-temperature polymer electrolyte membrane (HT-PEM) materials. Grafting vinylimidazole groups anchored with phosphoric acid onto polysulfone forms polar side chains, which promote the formation of microphase-separated structures within the membrane. The ionic clusters formed by nitrogen-containing functional groups, after anchoring phosphoric acid, provide ion channels for proton transport, while the hydrophobic backbone constitutes the membrane skeleton and maintains the tensile strength of the membrane. This design reduces the adverse impact of phosphoric acid molecules on the polymer backbone, thereby achieving simultaneous improvements in both the ionic conductivity and tensile strength of HT-PEM materials. This work investigates the effects of side chain length on the microphase-separated structure and molar free volume of the membrane, analyzes the influence and underlying rules of microphase-separated structures on the macroscopic properties of HT-PEMs (including proton conductivity, tensile strength, etc.), and clarifies the intrinsic relationship among the polymer chain structure, microphase-separated structure and macroscopic properties of side-chain-type HT-PEMs. Finally, the electrochemical behavior and discharge stability of the membrane are evaluated in high-temperature battery devices. The total data size is 23.8 MB.

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背景与挑战

背景概述

该数据集聚焦于侧链型高温质子交换膜的制备与性能研究，通过将乙烯基咪唑基团接枝到聚砜上形成极性侧链，以促进微观相分离结构的形成，从而在提升质子传导率的同时维持膜的拉伸强度。研究旨在解析微观结构对宏观性能的影响规律，并考察膜在高温电池器件中的电化学行为与稳定性。