Superprotonic Conduction of Acidified Benzimidazole-Linked Covalent Organic Framework

Jin Zhang; Ya Ru Kong; Yangyang Liu; Hong Bin Luo; Yang Zou; Shuang Quan Zang; Xiao Ming Ren

doi:10.1021/acsmaterialslett.2c00432

Superprotonic Conduction of Acidified Benzimidazole-Linked Covalent Organic Framework

Jin Zhang, Ya Ru Kong, Yangyang Liu, Hong Bin Luo, Yang Zou, Shuang Quan Zang, Xiao Ming Ren

School of Chemistry and Moleculai Engineering

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

33 Scopus citations

Abstract

The development of fast proton-conducting materials above 100 °C with high chemical stability is very challenging but of great significance for proton-exchange membrane fuel cells (PEMFCs). Herein, we demonstrate the first example of benzimidazole-linked COF (PBI-COF) exploited as a fast proton conductor above 100 °C toward PEMFC application. Our PBI-COF integrates the outstanding chemical stability of polybenzimidazoles (PBIs) and the ordered channel structure of COFs to provide a powerful platform to confine and stabilize H₃PO₄molecules for proton transport. Upon impregnation with H₃PO₄, H₃PO₄@PBI-COF exhibits high proton conductivity (>10^-1S cm^-1above 100 °C), low water swelling, and good long-term durability that is superior to many reported proton conductors. Furthermore, PEMFC with H₃PO₄@PBI-COF as a solid electrolyte achieves 0.936 V open-circuit voltages and 125 mW cm^-2maximum power densities.

Original language	English
Pages (from-to)	2597-2603
Number of pages	7
Journal	ACS Materials Letters
Volume	4
Issue number	12
DOIs	https://doi.org/10.1021/acsmaterialslett.2c00432
State	Published - 5 Dec 2022

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title = "Superprotonic Conduction of Acidified Benzimidazole-Linked Covalent Organic Framework",

abstract = "The development of fast proton-conducting materials above 100 °C with high chemical stability is very challenging but of great significance for proton-exchange membrane fuel cells (PEMFCs). Herein, we demonstrate the first example of benzimidazole-linked COF (PBI-COF) exploited as a fast proton conductor above 100 °C toward PEMFC application. Our PBI-COF integrates the outstanding chemical stability of polybenzimidazoles (PBIs) and the ordered channel structure of COFs to provide a powerful platform to confine and stabilize H3PO4molecules for proton transport. Upon impregnation with H3PO4, H3PO4@PBI-COF exhibits high proton conductivity (>10-1S cm-1above 100 °C), low water swelling, and good long-term durability that is superior to many reported proton conductors. Furthermore, PEMFC with H3PO4@PBI-COF as a solid electrolyte achieves 0.936 V open-circuit voltages and 125 mW cm-2maximum power densities.",

author = "Jin Zhang and Kong, {Ya Ru} and Yangyang Liu and Luo, {Hong Bin} and Yang Zou and Zang, {Shuang Quan} and Ren, {Xiao Ming}",

year = "2022",

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doi = "10.1021/acsmaterialslett.2c00432",

language = "英语",

volume = "4",

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T1 - Superprotonic Conduction of Acidified Benzimidazole-Linked Covalent Organic Framework

AU - Zhang, Jin

AU - Kong, Ya Ru

AU - Liu, Yangyang

AU - Luo, Hong Bin

AU - Zou, Yang

AU - Zang, Shuang Quan

AU - Ren, Xiao Ming

PY - 2022/12/5

Y1 - 2022/12/5

N2 - The development of fast proton-conducting materials above 100 °C with high chemical stability is very challenging but of great significance for proton-exchange membrane fuel cells (PEMFCs). Herein, we demonstrate the first example of benzimidazole-linked COF (PBI-COF) exploited as a fast proton conductor above 100 °C toward PEMFC application. Our PBI-COF integrates the outstanding chemical stability of polybenzimidazoles (PBIs) and the ordered channel structure of COFs to provide a powerful platform to confine and stabilize H3PO4molecules for proton transport. Upon impregnation with H3PO4, H3PO4@PBI-COF exhibits high proton conductivity (>10-1S cm-1above 100 °C), low water swelling, and good long-term durability that is superior to many reported proton conductors. Furthermore, PEMFC with H3PO4@PBI-COF as a solid electrolyte achieves 0.936 V open-circuit voltages and 125 mW cm-2maximum power densities.

AB - The development of fast proton-conducting materials above 100 °C with high chemical stability is very challenging but of great significance for proton-exchange membrane fuel cells (PEMFCs). Herein, we demonstrate the first example of benzimidazole-linked COF (PBI-COF) exploited as a fast proton conductor above 100 °C toward PEMFC application. Our PBI-COF integrates the outstanding chemical stability of polybenzimidazoles (PBIs) and the ordered channel structure of COFs to provide a powerful platform to confine and stabilize H3PO4molecules for proton transport. Upon impregnation with H3PO4, H3PO4@PBI-COF exhibits high proton conductivity (>10-1S cm-1above 100 °C), low water swelling, and good long-term durability that is superior to many reported proton conductors. Furthermore, PEMFC with H3PO4@PBI-COF as a solid electrolyte achieves 0.936 V open-circuit voltages and 125 mW cm-2maximum power densities.

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U2 - 10.1021/acsmaterialslett.2c00432

DO - 10.1021/acsmaterialslett.2c00432

M3 - 文章

AN - SCOPUS:85142608657

SN - 2639-4979

VL - 4

SP - 2597

EP - 2603

JO - ACS Materials Letters

JF - ACS Materials Letters

IS - 12

ER -

Superprotonic Conduction of Acidified Benzimidazole-Linked Covalent Organic Framework

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