Preparation and characterization of nano-crystalline LiNi۰.۵Co۰.۵VO۴ by tartate precursor combustion method

LiNi۰.۵Co۰.۵VO۴ has been successfully synthesized by tartate precursor combustion method using Li۲CO۳, Co(NO۳)۲.۶H۲O, Ni(NO۳)۲.۶H۲O and NH۴VO۳ as a starting materials in deionized water with the subsequent calcination at ۴۵۰-۶۰۰ oC for ۱۲ h. The combustion and decomposition of tartate precursor were studied by TGA and compared with tartaric acid. It found weight loss at ۵۰-۴۵۰ oC. The product showed a inverse spinel LiNi۰.۵Co۰.۵VO۴ which confirmed by PXRD. The crystal and particle sizes improved when calcination temperature was increased. Raman and FITR were studied the vibration of product. They detected V-O stretching in VO۴ tetrahedron, Li-O bending in LiO۶ octahedron and Li-O-M (M = Ni and Co) stretching. The TEM showed morphologies that composed nano-particle of LiNi۰.۵Co۰.۵VO۴.

Keywords:

Lithium ion batteries , LiNi۰.۵Co۰.۵VO۴ , Polymerization complex , Cathode material