Three-dimensional Co3O4@C@Ni3S2 sandwich-structured nanoneedle arrays: towards high-performance flexible all-solid-state asymmetric supercapacitors

Dezhi Kong; Chuanwei Cheng; Ye Wang; Jen It Wong; Yaping Yang; Hui Ying Yang

doi:10.1039/C5TA03469H

Three-dimensional Co₃O₄@C@Ni₃S₂ sandwich-structured nanoneedle arrays: towards high-performance flexible all-solid-state asymmetric supercapacitors†

Dezhi Kong,^ab Chuanwei Cheng,*^a Ye Wang,^b Jen It Wong,^b Yaping Yang^a and Hui Ying Yang*^b

* Corresponding authors

^a Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, P.R. China
E-mail: cwcheng@tongji.edu.cn

^b Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372, Singapore
E-mail: yanghuiying@sutd.edu.sg

Abstract

In this paper, we report the design and fabrication of a novel hierarchical Co₃O₄@C@Ni₃S₂ sandwich-structured nanoneedle array (NNA) electrode for supercapacitor application. The supercapacitor performance based on Co₃O₄@C@Ni₃S₂ NNA electrodes is investigated in detail. A lightweight and flexible asymmetric supercapacitor (ASC) is successfully fabricated using Co₃O₄@C@Ni₃S₂ NNAs as the positive electrode and activated carbon (AC) as the negative electrode, which delivers an output voltage of 1.8 V and high energy/power density (1.52 mW h cm⁻³ at 6 W cm⁻³ and 0.920 mW h cm⁻³ at 60 W cm⁻³), as well as remarkable cycling stability (∼91.43% capacitance retention after 10 000 cycles), owing to the unique 3D porous sandwich-structured nanoneedle array architecture and a rational combination of the three electrochemically active materials. As a result, the ternary hybrid architectural design demonstrated in this study provides a new approach to fabricate high-performance metal oxide/sulfide composite nanostructure arrays for next-generation energy storage devices.

This article is part of the themed collection: 2015 Journal of Materials Chemistry A Hot Papers

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Article information

DOI: https://doi.org/10.1039/C5TA03469H
Article type: Paper
Submitted: 12 May 2015
Accepted: 18 Jun 2015
First published: 19 Jun 2015

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J. Mater. Chem. A, 2015,3, 16150-16161

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Three-dimensional Co₃O₄@C@Ni₃S₂ sandwich-structured nanoneedle arrays: towards high-performance flexible all-solid-state asymmetric supercapacitors

D. Kong, C. Cheng, Y. Wang, J. I. Wong, Y. Yang and H. Y. Yang, J. Mater. Chem. A, 2015, 3, 16150 DOI: 10.1039/C5TA03469H

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Journal of Materials Chemistry A