A highly proton conductive perfluorinated covalent triazine framework via low-temperature synthesis

Lijiang Guan; Zhaoqi Guo; Qi Zhou; Jin Zhang; Cheng Cheng; Shengyao Wang; Xiang Zhu; Sheng Dai; Shangbin Jin

doi:10.1038/s41467-023-43829-4

A highly proton conductive perfluorinated covalent triazine framework via low-temperature synthesis

Lijiang Guan, Zhaoqi Guo, Qi Zhou, Jin Zhang, Cheng Cheng, Shengyao Wang, Xiang Zhu, Sheng Dai, Shangbin Jin

Chemical Sciences Division

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Proton-conducting materials are essential to the emerging hydrogen economy. Covalent triazine frameworks (CTFs) are promising proton-conducting materials at high temperatures but need more effective sites to strengthen interaction for proton carriers. However, their construction and design in a concise condition are still challenges. Herein, we show a low temperature approach to synthesize CTFs via a direct cyclotrimerization of aromatic aldehyde using ammonium iodide as facile nitrogen source. Among the CTFs, the perfluorinated CTF (CTF-TF) was successfully synthesized with much lower temperature (≤ 160 °C) and open-air atmosphere. Due to the additional hydrogen-bonding interaction between fluorine atoms and proton carriers (H₃PO₄), the CTF-TF achieves a proton conductivity of 1.82 × 10⁻¹S cm⁻¹ at 150 °C after H₃PO₄ loading. Moreover, the CTF-TF can be readily integrated into mixed matrix membranes, displaying high proton conduction abilities and good mechanical strength. This work provides an alternative strategy for rational design of proton conducting media.

Original language	English
Article number	8114
Journal	Nature Communications
Volume	14
Issue number	1
DOIs	https://doi.org/10.1038/s41467-023-43829-4
State	Published - Dec 2023

Funding

We greatly acknowledge the financial support from National Natural Science Foundation of China (no. 22275143, 21875078), Key Project of Natural Science Basic Research Program of Shaanxi (no. 2023JC-XJ-14), and Qin Chuangyuan cited high level innovation and entrepreneurship talent project (no. QCYYRCXM−2022−23). S.D. was supported by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, US Department of Energy. We appreciate for the support in the characterizations from the Analysis and Testing Center of the Xi’an Jiaotong University. We greatly acknowledge the financial support from National Natural Science Foundation of China (no. 22275143, 21875078), Key Project of Natural Science Basic Research Program of Shaanxi (no. 2023JC-XJ-14), and Qin Chuangyuan cited high level innovation and entrepreneurship talent project (no. QCYYRCXM−2022−23). S.D. was supported by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, US Department of Energy. We appreciate for the support in the characterizations from the Analysis and Testing Center of the Xi’an Jiaotong University.

Funders	Funder number
Key Project of Natural Science Basic Research Program of Shaanxi	2023JC-XJ-14
U.S. Department of Energy
Basic Energy Sciences
Chemical Sciences, Geosciences, and Biosciences Division
National Natural Science Foundation of China	21875078, 22275143
Xi’an Jiaotong University

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "A highly proton conductive perfluorinated covalent triazine framework via low-temperature synthesis",

abstract = "Proton-conducting materials are essential to the emerging hydrogen economy. Covalent triazine frameworks (CTFs) are promising proton-conducting materials at high temperatures but need more effective sites to strengthen interaction for proton carriers. However, their construction and design in a concise condition are still challenges. Herein, we show a low temperature approach to synthesize CTFs via a direct cyclotrimerization of aromatic aldehyde using ammonium iodide as facile nitrogen source. Among the CTFs, the perfluorinated CTF (CTF-TF) was successfully synthesized with much lower temperature (≤ 160 °C) and open-air atmosphere. Due to the additional hydrogen-bonding interaction between fluorine atoms and proton carriers (H3PO4), the CTF-TF achieves a proton conductivity of 1.82 × 10−1S cm−1 at 150 °C after H3PO4 loading. Moreover, the CTF-TF can be readily integrated into mixed matrix membranes, displaying high proton conduction abilities and good mechanical strength. This work provides an alternative strategy for rational design of proton conducting media.",

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AU - Cheng, Cheng

AU - Wang, Shengyao

AU - Zhu, Xiang

AU - Dai, Sheng

AU - Jin, Shangbin

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N2 - Proton-conducting materials are essential to the emerging hydrogen economy. Covalent triazine frameworks (CTFs) are promising proton-conducting materials at high temperatures but need more effective sites to strengthen interaction for proton carriers. However, their construction and design in a concise condition are still challenges. Herein, we show a low temperature approach to synthesize CTFs via a direct cyclotrimerization of aromatic aldehyde using ammonium iodide as facile nitrogen source. Among the CTFs, the perfluorinated CTF (CTF-TF) was successfully synthesized with much lower temperature (≤ 160 °C) and open-air atmosphere. Due to the additional hydrogen-bonding interaction between fluorine atoms and proton carriers (H3PO4), the CTF-TF achieves a proton conductivity of 1.82 × 10−1S cm−1 at 150 °C after H3PO4 loading. Moreover, the CTF-TF can be readily integrated into mixed matrix membranes, displaying high proton conduction abilities and good mechanical strength. This work provides an alternative strategy for rational design of proton conducting media.

AB - Proton-conducting materials are essential to the emerging hydrogen economy. Covalent triazine frameworks (CTFs) are promising proton-conducting materials at high temperatures but need more effective sites to strengthen interaction for proton carriers. However, their construction and design in a concise condition are still challenges. Herein, we show a low temperature approach to synthesize CTFs via a direct cyclotrimerization of aromatic aldehyde using ammonium iodide as facile nitrogen source. Among the CTFs, the perfluorinated CTF (CTF-TF) was successfully synthesized with much lower temperature (≤ 160 °C) and open-air atmosphere. Due to the additional hydrogen-bonding interaction between fluorine atoms and proton carriers (H3PO4), the CTF-TF achieves a proton conductivity of 1.82 × 10−1S cm−1 at 150 °C after H3PO4 loading. Moreover, the CTF-TF can be readily integrated into mixed matrix membranes, displaying high proton conduction abilities and good mechanical strength. This work provides an alternative strategy for rational design of proton conducting media.

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A highly proton conductive perfluorinated covalent triazine framework via low-temperature synthesis

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UN SDGs

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