Low temperature synthesis of LiCr 0·3 Co 0·7 O 2 intercalation compounds using citrate,oxalate,succinate,and glycinate precursors

The synthesis of Cr substituted lithium cobaltate LiCr_0·3Co_0·7O₂ using four different low temperature methods is presented. These wet chemical routes involve the mixing of either acetates or nitrates of Co and Cr with a chelating agent in aqueous solution, namely citric acid for the sol-gel method, oxalic acid for the coprecipitation method, succinic acid for the pyrolysis method, or the complexing agent glycine for the combustion method. The synthesised products were characterised by T G-DTA, XRD, SEM, and FTIR. Structural analysis revealed the R 3^-m space group for the solid solution. The electrochemical behaviour of LiCr_0·3Co_0·7O₂ was evaluated in a lithium cell.