Tuning the structure characteristic of the flexible covalent organic framework (COF) meets a high performance for lithium-sulfur batteries

Embedding Carbon Quantum Dots into Crystalline Polyimide Covalent Organic Frameworks to Enhance Water Oxidation for Achieving Dual-Channel Photocatalytic H2O2 Generation in a Wide pH Range

“…In order to investigate the chemical structure of samples, FT-IR analyses were conducted, as shown in Figure c. The characteristic absorption bands at 1771 and 1722 cm –1 were detected, which were related to the typical asymmetric and symmetric stretching vibrations of CO in the imide rings. , Meanwhile, the multiple characteristic peaks in the region of 1200–1700 cm –1 may be ascribed to the typical vibrations of −COO – and the stretching modes of aromatic C–N heterocycles, while the characteristic peaks between 600 and 1000 cm –1 may be derived from the typical vibrations of benzene rings …”

Regulating the kinetic behaviours of polysulfides by designing an Au–COF interface in lithium–sulfur batteries

“…29–31 In addition, COF materials can also be compounded with carbon/metal-based materials or modified with functional groups so that the COF interlayer allows the chemical capture of polysulfides and facilitates the transport of lithium ions, offering the possibility of constructing long-life and highly stable Li–S batteries. 32,33 These works effectively improve the electrochemical performance of Li–S batteries, promoting the development of COF-based separators. Nevertheless, the sluggish/incomplete conversion kinetic of polysulfides is still a bottleneck to the manufacture of practical Li–S batteries.…”

Combination of covalent organic frameworks (COFs) and polyoxometalates (POMs): the preparation strategy and potential application of COF–POM hybrids

“…[11][12][13] As reported, COFs possess a wide range of potential applications, including gas storage and separation, 14,15 catalysis, 16,17 sensing, 18,19 advanced electronics, 20,21 and drug delivery. 22,23 They are also extremely lightweight and have a high surface area, making them attractive for use in energy storage systems such as batteries 24,25 and supercapacitors. 26,27 In recent studies, scientists have thoroughly investigated the topological semimetal and higher-order topological insulator properties of COFs through quantum chemical calculations, which are important for a deeper understanding of COFs and for the design and development of their properties.…”