基于羧基功能化二维共价有机框架的新型质子导体  

Novel Proton Conductor Based on Carboxyl-functionalized Two-dimensional Covalent Organic Frameworks

作　　者：刘丽丽[1,2] 王晶 李娟[1] LIU Lili;WANG Jing;LI Juan(Institute of Crystalline Materials,Shanxi University,Taiyuan 030006,China;Institute of Molecular Science,Shanxi University,Taiyuan 030006,China)

机构地区：[1]山西大学晶态材料研究所,山西太原030006 [2]山西大学分子科学研究所,山西太原030006

出　　处：《山西大学学报（自然科学版）》2023年第1期185-192,共8页Journal of Shanxi University(Natural Science Edition)

基　　金：国家自然科学基金(21805173,21975049)。

摘　　要：文章采用从头法设计合成出一种孔壁含羧基的共价有机框架Py-COOH-COF,具有优良的结晶性和孔性。利用电化学交流阻抗谱对材料的质子传导性能进行了表征,Py-COOH-COF的质子传导率最高为0.005 9 S·cm^(-1),为进一步提高质子传导率,将富含氢键给受位点的聚乙烯亚胺(PEI)引入Py-COOH-COF的孔道中,在孔道充满PEI的状态下,质子传导率最高达到0.023 S·cm^(-1),达到了商用化的标准,有望作为一种环保经济且传导性能优异的质子导体应用于质子膜燃料电池中。In this paper, we denovo designed and synthesized a kind of covalent organic framework, Py-COOH-COF, with carboxyl groups on the pore wall, which has excellent crystallinity and porosity. Electrochemical impedance spectroscopy was used to characterize the proton conductivity of the material. The proton conductivity of Py-COOH-COF is up to 0.0059 S·cm^(-1). In order to further improve the proton conductivity, the Polyethyleneimine(PEI) is introduced into the pores of Py-COOH-COF. When the pores are filled with PEI, the proton conductivity can reach up to 0.023 S·cm^(-1), which is 3% higher than that of pure Py-COOH-COF. It meets the commercialization standard, and is expected to be used in fuel cells as an environmentally friendly, economical, and excellent conductive proton conductor.

关 键 词：质子导体 共价有机框架 羧酸根 燃料电池 

分 类 号：O436[机械工程—光学工程]