Journal
CHINESE CHEMICAL LETTERS
Volume 31, Issue 9, Pages 2330-2332Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2020.06.001
Keywords
Asymmetric supercapacitor; Electrochemical energy storage; Quantum dots; Transition metal hydroxides; Rare earth
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Funding
- Natural Science Program of Nanjing Xiaozhuang University [2018NXY22]
- 333 High-level Talents Cultivation Project of Jiangsu Province [BRA2018101]
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By integrating the merits of lanthanide elements and quantum dots, we firstly design CeO2 quantum dots doped Ni-Co hydroxide nanosheet via a controllable synthetic strategy, which exhibits a large specific capacitance (1370.7 F/g at 1.0 A/g) and a good cyclic stability (90.6% retention after 4000 cycles). Moreover, we assemble an aqueous asymmetric supercapacitor with the obtained material, which has an extremely high energy density (108.9 Wh/kg at 378 W/kg) and outstanding cycle stability (retaining 88.1% capacitance at 2.0 A/g after 4000 cycles). (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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