Synthesis Conditions Of Limn2o4 Prepared By Molten Salt Method

Cathode material LiMn2O4 for lithium-ion batteries was prepared by molten salt method. The effects from the species of molten salt, sintering time and sintering temperature during preparation were studied. XRD, SEM and charge-discharge tests were used to analyze the composition, structure, surface morphology and electrochemical properties of the cathode material. XRD results showed the structure of sample was pure spinel. SEM results showed the size of particle was uniform with the average diameter of several hundreds nanometers.The LiMn2O4 cathode material prepared under optimized conditions had an initial capacity of 125 mAh . g(-1) at 0.5C (60 mA . g(-1)) with a voltage window of 3.3-4.3 V. It showed good cyclic ability with capacity retention about 95% during the first 50 cycles at 0.5C, and about 96% between the 51(th) and 100(th) cycles at 1C.