Citation: YANG Jin-Lin, LIN Jin-Xin, GUO Shao-Yi. Preparation and Supercapacitance Performances of Hierarchical NiO/MnO₂ Nanosheet Array[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(2): 255-261. doi: 10.11862/CJIC.2017.029 shu

Preparation and Supercapacitance Performances of Hierarchical NiO/MnO₂ Nanosheet Array

College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China

Corresponding author: GUO Shao-Yi, syiguo@zstu.edu.cn
Received Date: 5 July 2016
Revised Date: 30 November 2016

Figures(5)

Hierarchical NiO/MnO₂ nanosheet array were synthesized by chemical bath deposition and hydrothermal method. XRD and SEM show that NiO nanosheets vertically grow on Ni foam and connect with each other to form a net-like array. Then, MnO₂ nano mesoporous foam deposites on both sides of NiO nanosheets, constructing NiO/MnO₂ core-shell composite structure. Pseudocapacitance performances were examined by cyclic voltammetry and galvanostatic charge-discharge. Compared with single NiO and MnO₂, hierarchical NiO/MnO₂ nanosheet array shows improved electrochemical performances, exhibiting high specific capacitance of 1 297 F·g^-1 at 1 A·g^-1 and 97% retention at 2 A·g^-1 after 1 000 cycles, which is due to the fact that the hierarchical nanosheet array structure quickens mass transfer of the electrolyte, enlarges contact between active material with the electrolyte, promotes pseudocapacitance reaction and enhances structure stability of NiO and MnO₂.
- NiO,
- MnO₂,
- supercapacitor,
- hierarchical nanosheet array
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Preparation and Supercapacitance Performances of Hierarchical NiO/MnO2 Nanosheet Array

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Preparation and Supercapacitance Performances of Hierarchical NiO/MnO₂ Nanosheet Array