Synthesis and performance of cross-linked poly(aryl ether nitrile) anion exchange membranes with dense cations and flexible side-chain structures for water electrolysis

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry Pub Date : 2024-10-28 DOI:10.1016/j.jelechem.2024.118750

Jianxiong Hu , Kexin Chen , Aman Liu , Xiaojing Zhang , Jian Li , Chenyi Wang , Xiaoyan Zhao

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引用次数: 0

Abstract

Anion exchange membranes (AEMs) are the core components in anion exchange membrane water electrolysis (AEMWE), which play crucial role and affect the performance of AEMWE. In this work, a series of cross-linked poly(aryl ether nitrile) anion exchange membranes (CPAEN-dDQA-x) with dense cations and flexible side-chain structures are synthesized. By introducing multiple modification elements into the polymer structure simultaneously, the ion conductivity, dimensional stability, and alkali resistance stability of the prepared AEMs are effectively improved and balanced. The representative CPAEN-dDQA-0.25 showed water absorption of only 27.6 %, swelling rate of 11.2 %, and conductivity of 115.37 mS/cm at 80°C. The IEC and conductivity retention value of CPAEN-dDQA-0.25 after in 2 M NaOH solution at 80°C for 480 h were up to 86.2 % and 82 %, respectively. Meanwhile, the current density of the water electrolysis cell based on CPAEN-dDQA-0.25 is up to 477.0 mA/cm² in 1 M KOH and 2.2 V, and its voltage don’t has significant change after 480 h of operation at a constant current density of 500 mA/cm².

查看原文本刊更多论文

用于电解水的具有致密阳离子和柔性侧链结构的交联聚（芳基醚腈）阴离子交换膜的合成及其性能

阴离子交换膜（AEMs）是阴离子交换膜电解水（AEMWE）的核心部件，对AEMWE的性能起着至关重要的影响。本研究合成了一系列具有致密阳离子和柔性侧链结构的交联聚（芳基醚腈）阴离子交换膜（CPAEN-dDQA-x）。通过在聚合物结构中同时引入多种改性元素，制备的阴离子交换膜的离子传导性、尺寸稳定性和耐碱稳定性得到了有效的改善和平衡。具有代表性的 CPAEN-dDQA-0.25 在 80°C 时的吸水率仅为 27.6%，膨胀率为 11.2%，电导率为 115.37 mS/cm。在 80°C 的 2 M NaOH 溶液中浸泡 480 小时后，CPAEN-dDQA-0.25 的 IEC 和电导率保持值分别高达 86.2 % 和 82 %。同时，基于 CPAEN-dDQA-0.25 的水电解池在 1 M KOH 和 2.2 V 下的电流密度高达 477.0 mA/cm2，并且在 500 mA/cm2 的恒定电流密度下工作 480 h 后电压没有显著变化。

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.