Ultrafine manganese dioxidenanowire network for high-performance supercapacitors

Abstract

Ultrafine MnO₂ nanowires with sub-10 nm diameters have been synthesized by a simple process of hydrothermal treatment with subsequent calcinations to form networks that exhibit an enhanced specific capacitance (279 F g⁻¹ at 1 A g⁻¹), high rate capability (54.5% retention at 20 A g⁻¹) and good cycling stability (1.7% loss after 1000 cycles).