Carbon quantum dots (CQDs)/Ce doped NiO nanocomposite for high performance supercapacitor

被引：22
作者：
Al-Enizi, Abdullah M. [1 ]
Ubaidullah, Mohd [1 ]
Kumar, Dinesh [2 ]
机构：
[1] King Saud Univ, Dept Chem, Coll Sci, Riyadh 11451, Saudi Arabia
[2] Cent Univ Gujarat, Sch Chem Sci, Inorgan & Nanochem, Gandhinagar 382030, India
来源：
MATERIALS TODAY COMMUNICATIONS | 2021年 / 27卷
关键词：
Hydrothermal synthesis; Carbon quantum dots; Metal oxide; Nanocomposite; Electrochemical analysis; Energy storage and conversion; THIN-FILMS; NANOPARTICLES; ELECTRODES; NANOTUBES; NANORODS;
D O I：
10.1016/j.mtcomm.2021.102340
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A cost effective novel carbon quantum dots/Ce-doped nickel oxide (CQDs/Ce-NiO) nanocomposite was synthesized via hydrothermal route. An exceptional BET surface area of 731 m(2) g(-1) and mesoporosity (similar to 17 nm) was estimated. In three-electrode system an excellent electrochemical behaviour was demonstrated by CQDs/Ce-NiO nanocomposite with high specific capacitance of similar to 2487 F g(-1) by cyclic voltammograms at a scan rate of 5 mV s(-1) and similar to 2513 F g(-1) by galvanostatic charge-discharge at a current density of 0.5 A g(-1) in 6M KOH electrolyte. This may be owing to elegant redox activity of Ce3+/Ce4+ ions and high conductivity of CQDs. The capacitance retention was found similar to 97 % after 2000 GCD cycles.
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页数：5
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