DOI: 10.1016/j.scib.2020.05.033
论文题名: Trimethyltriazine-derived olefin-linked covalent organic framework with ultralong nanofibers
作者: Zhang F. ; Wei S. ; Wei W. ; Zou J. ; Gu G. ; Wu D. ; Bi S.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期: 19 起始页码: 1659
结束页码: 1666
语种: 英语
中文关键词: 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
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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170146
Appears in Collections: 气候变化与战略
There are no files associated with this item.
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
Recommended Citation:
Zhang F.,Wei S.,Wei W.,et al. Trimethyltriazine-derived olefin-linked covalent organic framework with ultralong nanofibers[J]. Science Bulletin,2020-01-01,65(19)