Template-Assisted Hydrothermal Synthesis of NiO@Co₃O₄ Hollow Spheres with Hierarchical Porous Surfaces for Supercapacitor Applications

Authors

Wen ZHOU, MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China;
Xue-feng LU, MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China;
Ming-mei WU, MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China;Follow
Gao-ren LI, MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China;Follow

Corresponding Author

Ming-mei WU(ligaoren@mail.sysu.edu.cn);
Gao-ren LI(ligaoren@mail.sysu.edu.cn)

Abstract

Hollow structures have shown great potentials in a variety of important applications, such as energy conversion and storage. In order to further enhance the performance, the rational design of hollow structures with higher complexity in terms of composition and structure is highly desirable and still remains a great challenge. In this work, an efficient strategy was established for the fabrication of novel NiO@Co₃O₄ hollow spheres (HSs) with hierarchical porous surfaces by silica spheres template-assisted hydrothermal synthesis. The as-fabricated NiO@Co₃O₄ HSs showed high specific surface area of 219.68 m²·g^-1, and significant enhancement in ion diffusion and utilization rate, as well as effective prevention in nanoparticle agglomeration. When used as electrodes, the NiO@Co₃O₄ HSs exhibited a large specific capacitance of 1140.9 F·g^-1 at the scan rate of 5 mV·s-1 and excellent cycling stability, suggesting a promising application for supercapacitors.

Graphical Abstract

DOI Link

https://doi.org/10.13208/j.electrochem.160544

Publication Date

2016-10-28

Online Available Date

2016-08-01

Revised Date

2016-07-20

Received Date

2016-05-23

Recommended Citation

Wen ZHOU, Xue-feng LU, Ming-mei WU, Gao-ren LI. Template-Assisted Hydrothermal Synthesis of NiO@Co₃O₄ Hollow Spheres with Hierarchical Porous Surfaces for Supercapacitor Applications[J]. Journal of Electrochemistry, 2016 , 22(5): 513-520.
DOI: 10.13208/j.electrochem.160544
Available at: https://jelectrochem.xmu.edu.cn/journal/vol22/iss5/8

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