Si trova su / Altri legami
© 2021 American Chemical Society.In the present work, carbon quantum dots/CoS2 nanocomposite (CQDs/CoS2) was prepared through a solvent–free ball milling route followed by solvothermal treatment. The CQDs were prepared first by a green catalyst–free microwave–assisted procedure from glycerol, as a single precursor, with a quantum yield of ∼16%. Then, a ball mill–hydrothermal combination method was used to synthesize CQDs/CoS2 with edged bricklike morphology. Benefiting from advantageous features of large specific surface area (427.2 m2 g–1), unique nanostructure with high mesoporosity, and greater electronic conductivity, the as–synthesized CQDs/CoS2 nanocomposite electrode material displays a rather high specific pseudocapacitance, about 808 F g–1 at 1 A g–1 current density, a high rate capability with 83.9% capacity retention rate at 20 A g–1, and good cycling stability of 98.75% over 10 000 charge/discharge cycles at 1 A g–1. The attained results support the suitability of CQDs/CoS2 nanocomposite as a desired material for future high–performance electrochemical energy storage devices.
