一种吡嗪基共价有机聚合物的制备及在水系锌离子电池正极中的应用

Covalent organic polymers (COPs) are polymerized organic small molecule monomers with a highly cross-linked network structure connected by covalent bonds, and thus can exhibit unique electrochemical properties. In the field of aqueous zinc ion batteries (AZIBs), COPs are used as electrode materials involved in ion embedding and de-embedding, and have attracted much attention due to their unique redox active sites and stable framework structures. In this paper, a novel covalent organic polymer, TAPT-HAT-COP, which contains a variety of electro⁃ chemical active sites, such as pyrazine group, phenylimine group, and carbonyl group, was prepared and applied to the anode of AZIBs. Experimental results show that this material exhibited excellent multiplicity performance. At a current density of 0.5 A/g, its first discharge specific capacity reached 137 mA·h·g^‒1, and at a high current density of 5 A/g, the electrode material maintained 45.4% of its capacity after 4000 cycles. This study provides a new idea for the design of organic cathode materials and theoretical guidance for the development of new organic cathode materials for advanced aqueous zinc ion batteries. © 2024 Higher Education Press Limited Company. All rights reserved.