Journal
IONICS
Volume 24, Issue 2, Pages 549-561Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-017-2215-6
Keywords
Carrot; Porous carbon; Hydrothermal reaction; Supercapacitor
Funding
- National Science Foundation of China [21664012, 51462032]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT15R56]
- Innovation Team Basic Scientific Research Project of Gansu Province [1606RJIA324]
- Key Laboratory of Eco-Environment- Related Polymer Materials of Ministry of Education
- Key Laboratory of Polymer Materials of Gansu Province
- Outstanding Doctoral Dissertation Cultivation Program of Northwest Normal University
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The design of composited porous carbon-based electrode materials is keyed to improve the electrochemical performance for supercapacitors. Here, the natural carrot is used as a precursor to prepare porous carbon skeletons (CCs). Three different anthraquinones: anthraquinone (AQ), amino-anthraquinone (1-AAQ), and 2-aminoanthraquinone (2-AAQ) are used to modify the carbon skeletons with absorption. The maximum capacitance is obtained from material modified with 1-AAQ; it (1-AAQ-CC2) exhibits a noticeable pseudocapacitive performance with a brilliant capacitance of 328 F g(-1) at 0.5 A g(-1) and excellent cyclic stability (95% capacitance retention after 5000 cycles at 3 A g(-1)) in 2mol L-1 KOH aqueous electrolyte. Moreover, the assembled 1-AAQ-CC2/1-AAQ-CC2 symmetric supercapacitor exhibits a high energy density of 14.8 Wh kg(-1) at a power density of 240 W kg(-1) operated at the voltage range of 0 to 1.8 V in 0.5 mol L-1 Na2SO4 aqueous electrolyte. These results exhibit eco-friendly and low-cost design of organic and inorganic composite electrode materials for high-performance supercapacitors.
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