Amorphous microporous polymer with high-density sulphonic acid for proton conduction

IF 1.7 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Journal of Chemical Sciences Pub Date : 2025-01-22 DOI:10.1007/s12039-024-02340-z

Kun Zhang, Yanting Zhang, Lei Wu, Qingchao Liu

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Abstract

Proton conductors play a significant role in various fields, and recent research has focused on exploring crystalline porous materials for their favourable proton-transport properties. However, synthesizing these materials often poses challenges, especially in achieving crystallinity. In this study, we have successfully developed an innovative approach by constructing an amorphous microporous polymer (AMP) structure. Unlike traditional methods that require crystallization, our AMP maintains a certain pore space, while avoiding the need for strict crystallinity. Remarkably, this newly developed AMP displays high-density sulphonic acid sites on its skeleton, enabling it to function as an efficient proton conductor across a wide range of relative humidity (RH) levels. At 70°C and 100% RH, it achieves an impressive maximum conductivity value of 3.34 × 10⁻³ S cm⁻¹. Such an excellent performance can be attributed to the low activation energy for proton conduction, measuring a mere 0.266 eV. This signifies a Grotthuss mechanism, indicating that protons readily jump along hydrogen bonds within the material.

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含高密度磺酸的非晶态微孔聚合物用于质子传导

质子导体在许多领域发挥着重要的作用，最近的研究重点是探索具有良好质子传输特性的晶体多孔材料。然而，合成这些材料往往面临挑战，特别是在实现结晶度方面。在这项研究中，我们成功地开发了一种构建非晶微孔聚合物（AMP）结构的创新方法。与传统的需要结晶的方法不同，我们的AMP保持了一定的孔隙空间，同时避免了严格的结晶度要求。值得注意的是，这种新开发的AMP在其骨架上显示了高密度的磺酸位点，使其能够在大范围的相对湿度（RH）水平下作为有效的质子导体发挥作用。在70°C和100%相对湿度下，它的最大电导率达到了3.34 × 10−3 S cm−1。如此优异的性能可归功于质子传导的活化能低，仅为0.266 eV。这表明了一种格罗特苏斯机制，表明质子很容易沿着物质内部的氢键跳跃。图形抽象

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来源期刊

Journal of Chemical Sciences CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

3.10

自引率

5.90%

发文量

107

审稿时长

1 months

期刊介绍： Journal of Chemical Sciences is a monthly journal published by the Indian Academy of Sciences. It formed part of the original Proceedings of the Indian Academy of Sciences – Part A, started by the Nobel Laureate Prof C V Raman in 1934, that was split in 1978 into three separate journals. It was renamed as Journal of Chemical Sciences in 2004. The journal publishes original research articles and rapid communications, covering all areas of chemical sciences. A significant feature of the journal is its special issues, brought out from time to time, devoted to conference symposia/proceedings in frontier areas of the subject, held not only in India but also in other countries.