A novel quaternary carbon/metal oxide based nano‐composite electrode with high electrochemical capacitive performance

• Published in: Journal of porous materials Vol. 28; no. 3; pp. 929 - 941
• Main Authors: Nasreen, Farah, Anwar, Abdul Waheed, Majeed, Abdul, Ahmad, Muhammad Ashfaq, Ilyas, Usman, Ahmad, Furqan
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.06.2021; Springer Nature B.V
• Subjects: Capacitance; Catalysis; Characterization and Evaluation of Materials; Charge transfer; Chemistry; Chemistry and Materials Science; Composite materials; Electrode materials; Graphene; Manganese dioxide; Metal oxides; Multi wall carbon nanotubes; Nickel compounds; Physical Chemistry; Stability; Carbon nanotubes; Supercapacitor; Reduced graphene oxide; Metal oxide nanostructures; Composite electrode
• ISSN: 1380-2224; 1573-4854
• DOI: 10.1007/s10934-021-01043-x

A facile one-pot hydrothermal method is employed to synthesize {CNT–MnO 2 –Ni(OH) 2 } (CMN), {rGO–MnO 2 –Ni(OH) 2 } (RMN) along with a novel composite material{rGO–CNT–MnO 2 –Ni(OH) 2 } (RCMN). This paper first time reports reduced graphene oxide–multiwall carbon nanotube–manganese dioxide–nickel hydroxide rGO–CNT–MnO 2 –Ni(OH) 2 quaternary composite powder as a supercapacitor electrode material. The as-obtained rGO–CNT–MnO 2 –Ni(OH) 2 quaternary composite shows high specific capacitance (1906.4 F g −1 ) at 3 mV s −1 . In addition, cyclic stability measurement reveals that RCMN composite retains admirable capacitance (92.5%) even after 10,000 cycles. The enhancement in cyclic stability and specific capacitance is attributed to the exclusive combination of rGO/CNT as a conductive network and MnO 2 /Ni(OH) 2 nanostructures as active materials which endorse effective charge transfer and expedites high capacitance and cyclic stability.