期刊
NANOTECHNOLOGY
卷 28, 期 27, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aa73b1
关键词
self-assembling; graphene; supercapacitor; high energy density
资金
- NSFC [21505127, 21225524, 21527806, 21405147]
- Department of Science and Techniques of Jilin Province [20150201001GX]
- special funds for the Construction of Taishan Scholars [TS201511058]
Boosting the energy density. of capacitive energy storage devices remains a crucial issue for facilitating applications. Herein, we report a graphene-anthraquinone supramolecular nanostructure by self-assembly for supercapacitors. The sulfonated anthraquinone exhibits high water solubility, a pi-conjugated structure and redox active features, which not only serve. as a spacer to interact with. and stabilize graphene but also introduce. extra. pseudocapacitance contributions. The formed. nest-like three-dimensional (3D) nanostructure. with. further hydrothermal treatment enhances the accessibility of ion transfer. and exposes the redox-active quinone groups in the. electrolytes. A fabricated all-solid-state flexible symmetric device delivers a high specific capacitance of 398.5 F g(-1) at 1 A g(-1) ( 1.5 times higher than graphene), superior energy density (52.24 Wh kg(-1) at about. 1 kW kg(-1)) and good stability (82% capacitance retention after 10 000 cycles).
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