Rapid Charge Transfer Enabled by Noncovalent Interaction through Guest Insertion in Supercapacitors based on Covalent Organic Frameworks

Author:

Jiang Qiao‐Qiao1,Wang Xun1,Wu Qiong1,Li Ya‐Jie1,Luo Qiu‐Xia1,Mao Xiang‐Lan1,Cai Yuan‐Jun1,Liu Xin1,Liang Ru‐Ping1,Qiu Jian‐Ding12ORCID

Affiliation:

1. School of Chemistry and Chemical Engineering Nanchang University Nanchang 330031 P. R. China

2. State Key Laboratory of Nuclear Resources and Environment East China University of Technology Nanchang 330013 P. R. China

Abstract

AbstractCovalent organic frameworks (COFs) have been proposed for electrochemical energy storage, although the poor conductivity resulted from covalent bonds limits their practical performance. Here, we propose to introduce noncovalent bonds in COFs through a molecular insertion strategy for improving the conductivity of the COFs as supercapacitor. The synthesized COFs (MI−COFs) establish equilibriums between covalent bonds and noncovalent bonds, which construct a continuous charge transfer channel to enhance the conductivity. The rapid charge transfer rate enables the COFs to activate the redox sites, bringing about excellent electrochemical energy storage behavior. The results show that the MI−COFs exhibit much better performance in specific capacitance and capacity retention rate than those of most COFs‐based supercapacitors. Moreover, through simply altering inserted guests, the mode and strength of noncovalent bond can be adjusted to obtain different energy storage characteristics. The introduction of noncovalent bonds is an effective and flexible way to enhance and regulate the properties of COFs, providing a valuable direction for the development of novel COFs‐based energy storage materials.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Jiangxi Province

Publisher

Wiley

Subject

General Chemistry,Catalysis

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