Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 549, Issue -, Pages 105-113Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.04.056
Keywords
CuCo2S4; CNTs; Composite; Electrochemical performance; Supercapacitor
Categories
Funding
- UK Engineering Physics and Science Research Council [EPSRC EP/P018998/1]
- Newton Mobility Grant through Royal Society [1E161019]
- NFSC
- Royal academy of Engineering UK-Research Exchange with China and India
Ask authors/readers for more resources
CuCo2S4 is regarded as a promising electrode material for supercapacitor, but has inferior conductivity and poor cyclic stability which restrict its wide-range applications. In this work, hierarchically hybrid composite of CuCo2S4/carbon nanotubes (CNTs) was synthesized using a facile hydrothermal and sulfuration process. The embedded CNTs in the CuCo2S4 matrix provided numerous effective paths for electron transfer and ion diffusion, and thus promoted the faradaic reactions of the CuCo2S4 electrode in the energy storage processes. The CuCo2S4/CNTs-3.2% electrode exhibited a significantly increased specific capacitance of 557.5 F g(-1) compared with those of the pristine CuCo2S4 electrode (373.4 F g(-1)) and CuO/Co3O4/CNTs-3.2% electrode (356.5 F g(-1)) at a current density of 1 A g(-1). An asymmetric supercapacitor (ASC) was assembled using the CuCo2S4/CNTs-3.2% as the positive electrode and the active carbon as the negative electrode, which exhibited an energy density of 23.2 Wh kg(-1) at a power density of 402.7 W kg(-1). Moreover, the residual specific capacitance of this ASC device retained 85.7% of its original value after tested for 10,000 cycles, indicating its excellent cycle stability. (C) 2019 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available