Next Article in Journal
The Preparation of Porous Sol-Gel Silica with Metal Organic Framework MIL-101(Cr) by Microwave-Assisted Hydrothermal Method for Adsorption Chillers
Previous Article in Journal
Optical Absorption Enhancement in CdTe Thin Films by Microstructuration of the Silicon Substrate
Open AccessArticle

Co3O4@CoS Core-Shell Nanosheets on Carbon Cloth for High Performance Supercapacitor Electrodes

Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
Centre of Polymer Systems, Tomas Bata University in Zlin, nam. T. G. Masaryka 5555, Zlin 760 01, Czech Republic
Authors to whom correspondence should be addressed.
Academic Editor: Federico Bella
Materials 2017, 10(6), 608;
Received: 20 April 2017 / Revised: 26 May 2017 / Accepted: 27 May 2017 / Published: 1 June 2017
(This article belongs to the Section Energy Materials)
In this work, a two-step electrodeposition strategy is developed for the synthesis of core-shell Co3O4@CoS nanosheet arrays on carbon cloth (CC) for supercapacitor applications. Porous Co3O4 nanosheet arrays are first directly grown on CC by electrodeposition, followed by the coating of a thin layer of CoS on the surface of Co3O4 nanosheets via the secondary electrodeposition. The morphology control of the ternary composites can be easily achieved by altering the number of cyclic voltammetry (CV) cycles of CoS deposition. Electrochemical performance of the composite electrodes was evaluated by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy techniques. The results demonstrate that the Co3O4@CoS/CC with 4 CV cycles of CoS deposition possesses the largest specific capacitance 887.5 F·g−1 at a scan rate of 10 mV·s−1 (764.2 F·g−1 at a current density of 1.0 A·g−1), and excellent cycling stability (78.1% capacitance retention) at high current density of 5.0 A·g−1 after 5000 cycles. The porous nanostructures on CC not only provide large accessible surface area for fast ions diffusion, electron transport and efficient utilization of active CoS and Co3O4, but also reduce the internal resistance of electrodes, which leads to superior electrochemical performance of Co3O4@CoS/CC composite at 4 cycles of CoS deposition. View Full-Text
Keywords: Co3O4; CoS; carbon cloth; supercapacitor; nanostructured arrays Co3O4; CoS; carbon cloth; supercapacitor; nanostructured arrays
Show Figures

Figure 1

MDPI and ACS Style

Ning, J.; Zhang, T.; He, Y.; Jia, C.; Saha, P.; Cheng, Q. Co3O4@CoS Core-Shell Nanosheets on Carbon Cloth for High Performance Supercapacitor Electrodes. Materials 2017, 10, 608.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop