Ultrafine Mn3O4/CeO2 nanorods grown on reduced graphene oxide sheets as high-performance supercapacitor electrodes

• Published in: Journal of alloys and compounds 2017-10, Vol.722, p.54-59
• Main Authors: Liu, Chengbao, Sun, Hui, Qian, Junchao, Chen, Zhigang, Chen, Feng, Liu, Shouqing, Lv, Yifei, Lu, Xiaowang, Chen, Ailian
• Format: Article
• Language: English
• Subjects: Cerium oxide; Cerium oxides; Electrochemical analysis; Electrochemical properties; Electrodes; Electrolytes; Energy storage; Graphene; Hydrothermal method; Hydrothermal treatment; Manganese; Nanorods; Nanostructured materials; Supercapacitor; Supercapacitors
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2017.06.097

Manganese oxide and cerium dioxide (Mn3O4/CeO2) nanorods grown on the surface of graphene nanosheet were successfully obtained by hydrothermal treatment. The supercapacitor performance of Mn3O4/CeO2 nanorods nanostructured electrodes was greatly improved. The composite shows the excellent specific capacitance as high as 209.2 F g−1 in 1 M Na2SO4 electrolyte and the good long term cycle stability. The prominent electrochemical properties could be attributed to the enhanced conductivities and the improved accessible area for ions in electrolytes. The present study provides a facile way to design a high-performance Mn3O4/CeO2-graphene based supercapacitor electrode and the conception is extendable to other pseudocapacitive electrodes. •CeO2-Mn3O4 nanorods decorated graphene was studied as supercapacitor electrodes.•The CeO2 doping minimized the size of Mn3O4 nanorods and increase surface area.•The composite shows excellent specific capacitance and good long cycle stability.