Capacitive behavior of mesoporous Co(OH)2 nanowires

Abstract Dual-template synthesis, which includes porous anodic alumina and lyotropic liquid crystalline templates, has been carried out at various electrodeposition potentials, annealing and electrodeposition temperatures for mesoporous Co(OH) 2 nanowires. The maximum capacitance of 1180 F g −1 has been achieved at 4 A g −1 . The chemical state and detailed structure of Co(OH) 2 are examined by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) respectively. It reveals that the capacitance behavior of mesoporous Co(OH) 2 nanowires depends on not only the oxygen atomic ratio of Co(OH) 2 to CoO chemical state, but also the packed density of the interlaced nanostructure.