期刊
ACS APPLIED ENERGY MATERIALS
卷 4, 期 2, 页码 1496-1504出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.0c02680
关键词
Boron-doped g-C3N4 quantum dots; KOH cutting; Ni(OH)(2) nanoflowers; supercapacitors; impregnation method
资金
- National Key R&D Program of China [2018YFC1801503]
- National Natural Science Foundation of China [21806103]
By synthesizing boron-doped g-C3N4 quantum dots (B-CNQDs) and integrating them with Ni(OH)(2) nanoflowers, the supercapacitor's specific capacitance can be significantly increased, while reducing internal impedance and improving cycling stability.
For increasing the specific capacitance of supercapacitors, boron-doped g-C3N4 quantum dots (B-CNQDs) were synthesized by KOH cutting and further adsorbed on the surface of Ni(OH)(2) nanoflowers (B-CNQDx-Ni) by a mild impregnation method via electrostatic force. The B-CNQDx-Ni nanocomposites exhibit an increased surface area and reduced band gap energy compared with pure Ni(OH)(2), which result in a larger contact area between the electrode and the electrolyte and enhanced charge-transfer kinetics. The best B-CNQDx-Ni sample has an excellent specific capacitance of 1700 F/g at 1.5 A/g, low impedance at the alkaline conduction of 7.421 Omega, and a high stability cycling performance of 82% capacity retention after 5000 cycles, suggesting that B-CNQDx-Ni is a type of suitable electrode material used in supercapacitors.
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