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Rationally designed CuCo2O4@Ni(OH)2 with 3D hierarchical core-shell structure for flexible energy storage.
- Source :
-
Journal of Colloid & Interface Science . Dec2019, Vol. 557, p76-83. 8p. - Publication Year :
- 2019
-
Abstract
- Composite electrodes that possess both rational structures and appropriate integration are needed to deliver high electrochemical performance in energy storage devices. In this paper, a flexible and binder-free electrode material based on a heterogeneous core-shell structure of CuCo 2 O 4 @Ni(OH) 2 nanosheets grown on carbon cloth was fabricated by a simple method. The unique three-dimensional hierarchical structure gives the electrode a large specific surface area, which enables rapid response and increases of specific capacitance. The CuCo 2 O 4 @Ni(OH) 2 /carbon fiber cloth (CFC) composite electrode exhibited a specific capacitance of 2160 F g−1 at 1 A g−1 and a good rate capability energy of 82.7% at 20 A g−1. A flexible all-solid-state asymmetric supercapacitor (FAASC) was assembled with the CuCo 2 O 4 @Ni(OH) 2 /CFC electrode as the positive electrode, and activated carbon (AC)/CFC as the negative electrode. This device showed both a high energy density and power density (58.9 W h kg−1 at a power density of 400 W kg−1), and good long-term cycling stability. Furthermore, the assembled CuCo 2 O 4 @Ni(OH) 2 /CFC//AC/CFC devices were capable of driving a blue light-emitting diode after a short charge. The remarkable performance of this CuCo 2 O 4 @Ni(OH) 2 /CFC electrode indicates that this heterogeneous structure has great potential for applications in flexible high-performance energy storage devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 557
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 139296365
- Full Text :
- https://doi.org/10.1016/j.jcis.2019.09.010