One-step facile route to glucose/copper cobalt sulfide nanorod for high-performance asymmetric supercapacitors

• Published in: Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2019-08, Vol.21 (8), p.1-10, Article 189
• Main Authors: Wang, Fangping, Zheng, Jinfeng, Ma, Jing, Zhou, Kailing, Wang, Qizhao
• Format: Article
• Language: English
• Subjects: Activated carbon; Asymmetry; Capacitance; Carbon sources; Characterization and Evaluation of Materials; Chemistry and Materials Science; Cobalt; Cobalt sulfide; Composite materials; Copper; Current density; Discharge; Electrode materials; Electrodes; Flux density; Glucose; Inorganic Chemistry; Lasers; Materials Science; Morphology; Nanoparticles; Nanorods; Nanotechnology; Optical Devices; Optics; Photonics; Physical Chemistry; Research Paper; Sulfides; Supercapacitors; X ray photoelectron spectroscopy
• ISSN: 1388-0764; 1572-896X
• DOI: 10.1007/s11051-019-4614-2

In this work, club-like glucose/copper cobalt sulfide (C@CuCo 2 S 4 ) electrode material has been firstly synthesized via a hydrothermal method using glucose as a carbon source. The morphology and structure properties of the composite materials are investigated by SEM, TEM, XRD, XPS, and EDS. The galvanostatic charge-discharge test of C@CuCo 2 S 4 shows a great specific capacitance of 854 F g −1 at a discharge current density of 1 A g −1 , which is much higher than that of the precursor CuCo 2 S 4 . Furthermore, an asymmetric supercapacitor using the C@CuCo 2 S 4 electrode and activated carbon is assembled, which exhibits high energy density of 37.8 Wh kg −1 at a power density of 400 W kg −1 and excellent cycling stability with 96.5% capacitance retention after 7000 cycles at a current density of 5 A g −1 . In addition, two asymmetric devices in a series have better practical application value.