Facile synthesis of hierarchical porous ZnCo2O4 microspheres for high-performance supercapacitors

Abstract

Hierarchical porous ZnCo₂O₄ microspheres have been successfully synthesized via a solvothermal method followed by an annealing process. The ZnCo₂O₄ electrode shows a high specific capacitance of 647.1 F g⁻¹ at 1 A g⁻¹ and 440.6 F g⁻¹ at 10 A g⁻¹ in 2 M KOH. After 2000 cycles, the capacity loss is only 8.5%.