Fabrication of nanostructured MnO2/carbon nanotube composite from 3D precursor complex for high-performance supercapacitor

Abstract Nanostructured manganese dioxide decorated multi-walled carbon nanotube (MnO 2 /MWNT) composite was prepared by a hydrothermal method using a 3D precursor manganese benzoate dihydrazinate. Microscopic analysis confirmed that the nanostructured MnO 2 particles were densely decorated over the MWNT surface. The composite showed high specific capacitance (276 F·g −1 at a current density of 3.0 A·g −1 ) and an excellent cycle stability (91.6% capacitance retention after 5000 cycles), suggesting its potential application for a high-performance supercapacitor.