Short hydrogen-bond network confined on COF surfaces enables ultrahigh proton conductivity

Benbing Shi, Xiao Pang, Shunning Li, Hong Wu, Jianliang Shen, Xiaoyao Wang, Chunyang Fan, Li Cao, Tianhao Zhu, Ming Qiu, Zhuoyu Yin, Yan Kong, Yiqin Liu, Mingzheng Zhang, Yawei Liu, Feng Pan () and Zhongyi Jiang ()
Additional contact information
Benbing Shi: Tianjin University
Xiao Pang: Tianjin University
Shunning Li: Peking University Shenzhen Graduate School
Hong Wu: Tianjin University
Jianliang Shen: Tianjin University
Xiaoyao Wang: Tianjin University
Chunyang Fan: Tianjin University
Li Cao: Tianjin University
Tianhao Zhu: Tianjin University
Ming Qiu: Tianjin University
Zhuoyu Yin: Tianjin University
Yan Kong: Tianjin University
Yiqin Liu: Tianjin University
Mingzheng Zhang: Peking University Shenzhen Graduate School
Yawei Liu: Chinese Academy of Sciences
Feng Pan: Peking University Shenzhen Graduate School
Zhongyi Jiang: Tianjin University

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract The idea of spatial confinement has gained widespread interest in myriad applications. Especially, the confined short hydrogen-bond (SHB) network could afford an attractive opportunity to enable proton transfer in a nearly barrierless manner, but its practical implementation has been challenging. Herein, we report a SHB network confined on the surface of ionic covalent organic framework (COF) membranes decorated by densely and uniformly distributed hydrophilic ligands. Combined experimental and theoretical evidences have pointed to the confinement of water molecules allocated to each ligand, achieving the local enrichment of hydronium ions and the concomitant formation of SHBs in water-hydronium domains. These overlapped water-hydronium domains create an interconnected SHB network, which yields an unprecedented ultrahigh proton conductivity of 1389 mS cm−1 at 90 °C, 100% relative humidity.

Date: 2022
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DOI: 10.1038/s41467-022-33868-8

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