气候变化领域集成服务门户(CCPortal): Trimethyltriazine-derived olefin-linked covalent organic framework with ultralong nanofibers

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DOI	10.1016/j.scib.2020.05.033
	Trimethyltriazine-derived olefin-linked covalent organic framework with ultralong nanofibers
	Zhang F.; Wei S.; Wei W.; Zou J.; Gu G.; Wu D.; Bi S.
发表日期	2020
ISSN	20959273
起始页码	1659
结束页码	1666
卷号	65 期号:19
英文摘要	Two-dimensional (2D) olefin-linked covalent organic frameworks (COFs) with excellent π-electron communication and high stability are emerging as promising crystalline polymeric materials. However, because of the limited species of COFs, their characteristics, processability and potential applications have not been completely understood and explored. In this work, we prepared two novel olefin-linked 2D COFs through Knoevenagel condensation of 2,4,6-trimethyl-1,3,5-triazine with tritopic triazine-cored aldehydes. The resulting COFs exhibit highly crystalline honeycomb-like structures stacked from hexagonal-latticed polymeric layers and display well-defined nanofibrillar morphologies with the uniform diameters of ca. 80 nm and ultra-lengths up to several micrometers. Such COF nanofibers can be readily composited with carbon nanotubes into high-quality continuous thin films, which are further compacted by a typical hot-pressing process to enhance their densities and mechanical strength without changing their fibrous microstructures. Such film-fabricated interdigital microelectrodes and the ionogel electrolyte are assembled into planar micro-supercapacitors (MSCs), which exhibit an outstanding areal capacitance of 44.3 mF cm−2, large operating voltage window of 2.5 V, high volumetric energy density of 38.5 mWh cm−3 as well as excellent cycling stability. © 2020 Science China Press
关键词	Covalent organic framework Energy storage Micro-supercapacitor Nanofiber Olefin linkage
英文关键词	Capacitance; Carbon films; Electrolytes; Hot pressing; Microelectrodes; Nanocrystalline materials; Nanofibers; Olefins; Polymers; Covalent organic frameworks; Electron communication; Fibrous microstructure; Honeycomblike structures; Knoevenagel condensation; Micro supercapacitors; Two Dimensional (2 D); Volumetric energy densities; Nanocomposite films
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207291
作者单位	School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Robotics Institute, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240, China
推荐引用方式 GB/T 7714	Zhang F.,Wei S.,Wei W.,et al. Trimethyltriazine-derived olefin-linked covalent organic framework with ultralong nanofibers[J],2020,65(19).
APA	Zhang F..,Wei S..,Wei W..,Zou J..,Gu G..,...&Bi S..(2020).Trimethyltriazine-derived olefin-linked covalent organic framework with ultralong nanofibers.Science Bulletin,65(19).
MLA	Zhang F.,et al."Trimethyltriazine-derived olefin-linked covalent organic framework with ultralong nanofibers".Science Bulletin 65.19(2020).