Characterisation of Cation Ordering in Layered Rock-salt LiNi_(1/3)Mn_(1/3)Co_(1/3)O_2 Cathode Material for Lithium Ion Batteries

摘要

The layered LiNi_(1/3)Mn_(1/3)Co_(1/3)O_2 that formed with the α-NaFeO_2 structure were synthesised by conventional solid state method. Rietveld refinement results indicated that the amount of cation disorder (or known as interlayer mixing) affected by temperature. The samples that prepared at 950℃ in oxygen possessed slightly lower amount of interlayer mixing and excellent cycling performance compared to samples that prepared at 900℃. The initial charge-discharge capacity delivered was -204 mAh/g and -140 mAh/g, respectively. Furthermore, the structural and electrochemical properties were quite comparable to reported in literatures.