期刊
CHEMICAL ENGINEERING JOURNAL
卷 435, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.135121
关键词
Graphyne materials; Nitrogen doping; Direct synthesis; Energy storage; Supercapacitors
资金
- National Natural Science of China [51973128]
- Department of Science and Technology of Sichuan Province [2019YJ0128]
The development of graphyne-type carbon materials, constructed by sp(2) and sp hybridized carbon atoms, holds great promise for energy and environmental applications. In this study, nitrogen-doped graphyne materials were synthesized using a cross-coupling reaction and demonstrated high capacitance and cycling properties after heat treatment. The copolymerization strategy presented here provides a rational design principle for constructing novel graphyne-type carbon materials for energy storage.
Development of graphyne-type carbon materials, which are constructed by different combination of sp(2) and sp hybridized carbon atoms, has been a thriving research hotspot in material science, due to their promising application in a range of energy and environmental fields. Herein, nitrogen-doped graphyne materials (NGY-1 and NGY-2) were directly synthesized by Sonogashira-Hagihara cross-coupling reaction, using hydrogen deficient multi-acetylene and polyhalide compounds as the comonomers. NGY-1 and NGY-2 possess twodimensional porous structure, high nitrogen content and homogenous nitrogen distribution. After heat treatment at the temperature of 800 ?, the obtained materials NGY-1-800 and NGY-2-800 demonstrate high supercapacitive energy storage performances with specific capacitances up to 312 F g(-1) at 0.1 A g(-1) and excellent cycling properties. Compared with NGY-1-800, NGY-2-800 obtained from the pyrazine-containing precursor, exhibits a better rate capability thanks to higher content of graphitic nitrogen doping. The copolymerization strategy developed here can potentially provide a rational design principle and open a new gateway for the construction of novel graphyne-type carbon materials for energy storage applications.
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