共价有机骨架
侧链
共价键
质子输运
膜
材料科学
电导率
氢键
质子
离子键合
化学工程
乙醚
高分子化学
质子交换膜燃料电池
电化学
聚合物
分子
化学
复合材料
电极
有机化学
物理化学
生物化学
工程类
离子
量子力学
物理
作者
Ziwen Liu,Xiao Pang,Benbing Shi,Na Xing,Yawei Liu,Bohui Lyu,Leilang Zhang,Yan Kong,Sijia Wang,Zhong Gao,Rundong Xue,Tianyu Jing,Changkun Liu,Qing-Xian Bai,Hong Wu,Zhongyi Jiang
出处
期刊:Materials horizons
[The Royal Society of Chemistry]
日期:2024-01-01
卷期号:11 (1): 141-150
被引量:2
摘要
Electrochemical hydrogen compression (EHC) is an emerging energy conversion technology. Proton exchange membranes (PEMs) with high proton conductivity and high mechanical strength are highly required to meet the practical requirements of EHC. Herein, ionic covalent organic frameworks (iCOFs) with tunable side chains were synthesized and introduced into the sulfonated poly (ether ether ketone) (SPEEK) matrix to fabricate hybrid PEMs. In our membranes, the rigid iCOFs afford ordered proton conduction channels, whereas the flexible side chains on iCOFs afford abundant proton conduction sites, adaptive hydrogen bonding networks, and high local density short hydrogen bonds for highly efficient proton transport. Moreover, the hydrogen bond interactions between the side chains on iCOFs and the SPEEK matrix enhance the mechanical stability of membranes. As a result, the hybrid PEM acquires an enhanced proton conductivity of 540.4 mS cm-1 (80 °C, 100%RH), a high mechanical strength of 120.41 MPa, and a superior performance (2.3 MPa at 30 °C, 100%RH) in EHC applications.
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