Low temperature synthesis of LiCr0·3Co0·7O2 intercalation compounds using citrate, oxalate, succinate, and glycinate precursors

Abstract

Abstract The synthesis of Cr substituted lithium cobaltate LiCr0·3Co0·7O2 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 LiCr0·3Co0·7O2 was evaluated in a lithium cell.