Electrochemical characteristics of partially cobalt-substituted LiMn2−yCoyO4 spinels synthesized by Pechini process

摘要: Abstract Un-substituted LixMn2O4 with various Li/Mn ratios and Co-substituted LiMn2−yCoyO4 spinels were prepared by the Pechini method. The precursors calcined at 200 °C for 6 h followed heat-treatment 800 °C 8 h. Crystalline structure electrochemical characterization of synthesized cathode materials lithium batteries had been studied. showed an improvement on cycling properties over un-substituted one. Among spinels, LiMn1.8Co0.2O4 exhibited most promising performance initial specific discharge capacity 110 mAh g−1 fading rate 0.5 mAh g−1 per cycle (or 0.45% cycle). in might be contributed stabilization spinel smaller lattice constant when manganese ion was partially substituted Co3+ ion.