A 3D COF constructed by interlayer crosslinking of 2D COF as cathode material for lithium–sulfur batteries
Yingming Wang, Mingkai Li, Tianzhuo Wen, GU Guo-xian
Abstract
The design and construction of three-dimensional covalent organic frameworks (3D COF) remains a major challenge, and it is necessary to explore new strategies to synthesize 3D COF with ideal structure. Here, we utilize two-dimensional covalent organic framework (2D COF) with allyl side chain to achieve interlayer crosslinking through olefin metathesis reaction, thereby constructing a 3D COF with cage-like structures. This new material named CAGE-COF has larger specific surface area and more open pore structure than the original 2D COF. The cathode material with CAGE-COF retained 78.7% of its initial capacity after 500 cycles, and the fading rate is 0.04% each cycle.
Topics & Concepts
Materials scienceCovalent organic frameworkCovalent bondCathodeLithium (medication)Stack (abstract data type)Chemical engineeringComposite materialOrganic chemistryChemistryComputer scienceEngineeringProgramming languagePorosityMedicinePhysical chemistryEndocrinologyCovalent Organic Framework ApplicationsAdvanced Battery Materials and TechnologiesN-Heterocyclic Carbenes in Organic and Inorganic Chemistry