Synthesis of a rGO/NiO composite with a hierarchical pore structure by self-assembly and its electrochemical performance as a supercapacitor electrode

YUAN Shu-xia; YANG Ming-hui; LU Chun-xiang; WANG Xiao-min

doi:10.1016/S1872-5805(20)60525-X

Volume 35 Issue 6

Dec. 2020

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Article Navigation > New Carbon Mater. > 2020 > 35(6): 731-738

YUAN Shu-xia, YANG Ming-hui, LU Chun-xiang, WANG Xiao-min. Synthesis of a rGO/NiO composite with a hierarchical pore structure by self-assembly and its electrochemical performance as a supercapacitor electrode. New Carbon Mater., 2020, 35(6): 731-738. doi: 10.1016/S1872-5805(20)60525-X

Citation:

YUAN Shu-xia, YANG Ming-hui, LU Chun-xiang, WANG Xiao-min. Synthesis of a rGO/NiO composite with a hierarchical pore structure by self-assembly and its electrochemical performance as a supercapacitor electrode. New Carbon Mater., 2020, 35(6): 731-738. doi: 10.1016/S1872-5805(20)60525-X

Citation:

YUAN Shu-xia, YANG Ming-hui, LU Chun-xiang, WANG Xiao-min. Synthesis of a rGO/NiO composite with a hierarchical pore structure by self-assembly and its electrochemical performance as a supercapacitor electrode. New Carbon Mater., 2020, 35(6): 731-738. doi: 10.1016/S1872-5805(20)60525-X

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Synthesis of a rGO/NiO composite with a hierarchical pore structure by self-assembly and its electrochemical performance as a supercapacitor electrode

doi: 10.1016/S1872-5805(20)60525-X

1.
Taiyuan University of Technology, Taiyuan 030024, China;
2.
Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
3.
Aerospace Research Institute of Materials&Processing Technology, Beijing 100076, China

Funds: National Natural Science Foundation of China (51572184).

Received Date: 2020-05-06
Rev Recd Date: 2020-06-16
Publish Date: 2020-12-31

Abstract

Abstract

A GO/Ni(HCO₃)₂ composite was synthesized by the self-assembly of layer Ni(HCO₃)₂ and GO in a mixed suspension under sonication, followed by heat treatment to obtain rGO/NiO for use as the electrode material of supercapacitors. The structural change from the GO/Ni(HCO₃)₂ to the rGO/NiO was investigated by XRD, SEM, and nitrogen adsorption. Results indicate that the rGO/NiO has a specific surface area of 121.3 m² g^-1 and pore volume of 0.26 cm³ g^-1, and a hierarchical porous structure with a pore size range of 2-100 nm. The high specific surface area and the hierarchical porous structure give the rGO/NiO composite a high specific capacitance of 919 F g^-1 (0.5 A g^-1) and an excellent rate capability with a capacitance retention rate of 71% when the current density increases from 0.5 to 5 A g^-1. The specific capacitance retains 91% of its original value after cycling at a current density of 2 A g^-1 for 3 000 cycles, indicating good stability.
- Heterogeneous assembly,
- Hierarchical porous,
- rGO/NiO,
- Electrochemical performance

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References(29)

References

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