Charge Separation by Imidazole and Sulfonic Acid-Functionalized Covalent Organic Frameworks for Enhanced Proton Conductivity

被引：23

作者：

Bian, Shuyang ^{[1
]}

Zhang, Kun ^{[1
]}

Wang, Yuxiang ^{[1
]}

Liu, Ziya ^{[1
]}

Wang, Guixiang ^{[1
]}

Jiang, Xinzhu ^{[1
]}

Pan, Yaoyao ^{[1
]}

Xu, Bingqing ^{[1
]}

Huang, Guoji ^{[1
]}

Zhang, Gen ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Chem & Chem Engn, Minist Educ, Key Lab Soft Chem & Funct Mat, Nanjing 210094, Jiangsu, Peoples R China

来源：

ACS APPLIED ENERGY MATERIALS | 2022年 / 5卷 / 01期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

covalent organic frameworks; sulfonic acid functionalized; charge separation; proton conduction; hydrogen bond networks; POROUS COORDINATION POLYMERS; SUPERPROTONIC CONDUCTIVITY; STRUCTURAL TRANSFORMATION; PHOSPHORIC-ACID; CRYSTALLINE; NANOSHEETS; ENERGY;

D O I：

10.1021/acsaem.1c03721

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The ion aggregation induced by a strong Coulomb force leads to hard charge separation and poor proton conductivity. Herein, covalent organic frameworks (COFs) linking both positive charged imidazole and negative charged sulfonic acid were produced and were finally incorporated with NH4Br molecules. As a result, the charge separation ability of NH4Br molecules is profoundly enhanced by charged groups on COFs, which is proved by X-ray photoelectron spectroscopy measurement. The proton conductivity of charged COFs is higher than that of neutral COFs, which can be as high as 3.7 x 10(-3) S cm(-1) at 90 degrees C and 100% relative humidity. The activation energy is also lower in charged COFs, demonstrating strengthened charge separation ability and easier moving proton carriers as well.

引用

页码：1298 / 1304

页数：7

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