Synthesis and electrochemical performance of Co3O4 via a coordination method

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2018-09, Vol.124 (9), p.1-8, Article 623
• Main Authors: Guo, Rui, Wang, Renchao, Ni, Zhiyuan, Liu, Xuanwen
• Format: Article
• Language: English
• Subjects: Applied physics; Characterization and Evaluation of Materials; Chemical synthesis; Cobalt oxides; Condensed Matter Physics; Diffraction; Electrochemical analysis; Hydrothermal reactions; Machines; Manufacturing; Materials science; Morphology; Nanotechnology; Optical and Electronic Materials; Physics; Physics and Astronomy; Precursors; Processes; Scanning electron microscopy; Single crystals; Surfaces and Interfaces; Thin Films; X-ray diffraction
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-018-1873-1

Co 3 O 4 particles were prepared via a coordination-compound method (CCM) with [Co(3,5-pdc)(2,2-bpy)(H 2 O) 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 Co 3 O 4 sample was also prepared via a coprecipitation method (CPM). The Co 3 O 4 samples were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The morphology of Co 3 O 4 -CCM is a regular tetrakaidecahedron, which is completely different from that of Co 3 O 4 –CPM. Electrochemical properties of Co 3 O 4 were investigated using cyclic voltammetry and galvanostatic charge–discharge measurements. The specific capacitance of Co 3 O 4 –CCM is 243.8 F/g, which is 1.77 times greater than that of Co 3 O 4 –CPM. (CCDC: 633050.)