Hierarchical porous NiCo2S4 hexagonal plates: Formation via chemical conversion and application in high performance supercapacitors

Abstract

Designand prepare electrode material with porous structure is an effective method to enhance the electrochemical performance in supercapacitors. In this work, we developed hierarchical porous NiCo2S4 hexagonal plates via hydrothermal method by controlling sulfidation process. Measurements, such as XRD and SEM, are used to investigate the morphological and structural evolution of the hierarchical porous NiCo2S4 hexagonal plates. With advantages of high electronic conductivity, the interconnected nanometer-sized subunits of the material and the existence of porous, which cause shorter distance for transportation of electrolyte ion, excellent electrochemical performances exhibit with a high specific capacitance of 852.5 F g−1 after 5000 cycles at a current density of 10 A g−1. The outstanding properties indicate hierarchical porous NiCo2S4 hexagonal plates are promising future electrode materials for supercapacitors.