Facile synthesis of porous MnCo2O4.5 hierarchical architectures for high-rate supercapacitors

Abstract

Porous urchin-like MnCo₂O_4.5 hierarchical architectures (~4–6 μm in diameter) synthesized by a facile hydrothermal route followed by a calcination process exhibited a specific capacitance of 151.2 F g⁻¹ at 5 mV s⁻¹, outstanding rate capability with 83.6% specific capacitance retention even when the current density is increased 50 times and excellent long-term cycle stability at progressively varied current densities and could be considered as a potential mixed transition metal oxide material for high-rate supercapacitors in some special applications that do not require a high capacitance.