Synthesis of 2-substituted-Pyrimidine-based porous aromatic frameworks via oxygen involved biginelli multicomponent polymerization: toward high performance Li–S batteries. (June 2022)

• Record Type: Journal Article
• Authors: Ji, H.; Yan, G.; Wang, H.; Feng, Y.; Zhang, X.; Geng, D.; Shi, J.; Liu, G.; Qu, X.
• Is Part Of: Materials today chemistry. Volume 24(2022)
• Publication Date: 2022-06
• Subjects: Porous aromatic frameworks -- Biginelli-oxidation multicomponent polymerization -- 2-Substituted-pyrimidine -- Functional groups -- Lithium-sulfur batteries; Chemistry -- Periodicals; Materials -- Research -- Periodicals; Materials science -- Periodicals; Chemistry; Materials -- Research; Electronic journals; Periodicals; 660.282
• DOI: 10.1016/j.mtchem.2022.100875
• Languages: English
• ISSNs: 2468-5194

Abstract

Abstract: Facile, general methods for the preparation of functionalized porous aromatic frameworks (PAFs) are necessary. Herein, we describe a new method for the one-step synthesis of functionalized pyrimidine-based PAFs via oxygen involved Biginelli multicomponent polymerization. As first application instance, we constructed a 2-amino-pyrimidine-based PAF (BPAF-1), and followed by employed it as a sulfur host material for lithium-sulfur batteries. Attributed to its 2-amino-pyrimidine structural superiorities, the BPAF-1/S composites demonstrate excellent electrochemical performance as cathode in lithium-sulfur batteries, such as good cyclability with a high capacity retention of 78.1% after 500 cycles and high rate capability up to 5C. Besides, it is convenient to bring various 2-substituted functional groups such as –OH, –SH, methyl, and phenyl functional groups to pyrimidine-based PAFs under similar conditions, which provided its wide applicability. Graphical abstract: A series of functional 2-substituted-pyrimidine-based porous aromatic frameworks were effectively synthesized by Biginelli-oxidation multicomponent polymerization, compared with traditional route―pre-synthesis and post-modification, which opens a new route for preparing functional porous aromatic frameworks. Image 1 Highlights: 2-substituted-pyrimidine-based PAFs were directly synthesized via Biginelli-oxidation multicomponent polymerization. It is convenient to bring various 2-substituted functional groups to PAFs via this method, providing its wide applicability. 2-amino-pyrimidine-based PAFs (BPAF-1) can be applied as a sulfur host material for Li-S batteries. BPAF-1/S cathode shows an excellent performance on lithium-sulpur batteries, such as good cyclability and high rate capability up to 5C.