Construction and Application of nanocellulose/graphene/MnO2 three-dimensional composites as potential electrode materials for supercapacitors

• Published in: Journal of materials science. Materials in electronics 2020, Vol.31 (2), p.1236-1246
• Main Authors: Wang, Yan-Yun, Fu, Qing-Jin, Bai, Yuan-Yuan, Ning, Xiao, Yao, Chun-Li
• Format: Article
• Language: English
• Subjects: Aerogels; Biomass; Capacitance; Carbon; Characterization and Evaluation of Materials; Chemistry and Materials Science; Cycle ratio; Electrochemical analysis; Electrode materials; Electrodes; Graphene; Manganese dioxide; Materials Science; Metal oxides; Metal particles; Optical and Electronic Materials; Supercapacitors; Three dimensional composites
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-019-02635-9

The research on graphene–nanocellulose-based electrodes in supercapacitors has attracted more and more attention. We have innovatively prepared a carbon–biomass–metal oxide ternary aerogel electrode using a green hydrothermal method, successfully combining a graphene–nanocellulose–manganese dioxide electrode (MCGA) by loading MnO 2 metal particles into a three-dimensional porous aerogel composed of graphene and nanocellulose. It is found that when the mass ratio of graphene, nanocellulose and MnO 2 is 1:1:4, the obtained aerogel electrode MCGA 1:1:4 shows the best electrochemical performance. The MCGA 1:1:4 electrode exhibits a high specific capacitance of 212.73 F g −1 at 5 mV s −1 and extreme stability of 86.5% capacitance retention ratio after 5000 cycles at 2 A g −1 . This ternary hybrid electrode based on biomass, carbon and metal oxides may become a trend in the development of high-performance supercapacitors.