Three-dimensional NiCo2O4@NiCo2O4 core–shell nanocones arrays for high-performance supercapacitors
By Xiuhua Wang, Yao Fang, Bo Shi, F. Huang, Fang Rong, R. Que. Chemical Engineering Journal, 2018
265 citations recorded by the source corpus.
Abstract The highly ordered three-dimensional hierarchical NiCo2O4@NiCo2O4 core–shell nanocones arrays on nickel foams are synthesized by stepwise hydrothermal synthesis. The unique nanoarchitectures consist of a layer of NiCo2O4 nanosheets well coated on the surface of NiCo2O4 nanocones. When used in supercapacitors, the NiCo2O4@NiCo2O4 core–shell hierarchical nanostructures exhibit a remarkable capacitance of 2045.2 F g−1 at a current density of 1 A g−1, which are better than that of the individual components of NiCo2O4 nanosheets and NiCo2O4 nanocones. Furthermore, the predominant diffusion-controlled storage is revealed by theoretical analysis. An asymmetric supercapacitor device based on the hierarchical NiCo2O4@NiCo2O4 core–shell nanostructure and activated carbon is fabricated and exhibits a desirable high energy densities with a value of 82.95 Wh kg−1 at power density of 0.35 kW kg−1. These results indicate that the as-prepared NiCo2O4@NiCo2O4 are outstanding candidate for electrochemical supercapacitors.
Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/7895ea542b239b1709fd1aca2e76a68fb1ee0963
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Citations in the corpus
- Tailoring nanostructured transition metal phosphides for high-performance hybrid supercapacitors (2021, background): “The 3D core–shell or hierarchical nanoarchitectures have shown significantly electrochemical improvement due to large surface areas, abundant surface redox reactions and fast transport of ions or electrons [41].”