Synthesis and electrochemical performance of Co3O4 via a coordination method

Co3O4 particles were prepared via a coordination-compound method (CCM) with [Co(3,5-pdc)(2,2-bpy)(H2O)(2)] 2H(2)O (H(2)pdc = 3,5-pyridinedicarboxylic acid, bpy = 2,2'-bipyridine) as a complex precursor. The one-dimensional cobalt(II) coordination precursor was synthesized via hydrothermal reactions with cobaltous nitrate and corresponding ligands. Single crystal X-ray diffraction analysis reveals that the crystal belongs to the triclinic system with space group P-1. For comparison, the Co3O4 sample was also prepared via a coprecipitation method (CPM). The Co3O4 samples were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The morphology of Co3O4-CCM is a regular tetrakaidecahedron, which is completely different from that of Co3O4-CPM. Electrochemical properties of Co3O4 were investigated using cyclic voltammetry and galvanostatic charge-discharge measurements. The specific capacitance of Co3O4-CCM is 243.8 F/g, which is 1.77 times greater than that of Co3O4-CPM. (CCDC: 633050.).