Low temperature combustion synthesis and performance of spherical 0.5Li2MnO3-LiNi_(0.5)Mn_(0.5)O2 cathode material for Li-ion batteries

摘要

The cathode material 0.5Li2MnO3-LiNi_(0.5)Mn_(0.5)O2 had been synthesized via low temperature combustion process followed by an annealing treatment. The microstructure and morphology characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) showed that the synthesized product had high crystallinity, α-NaFeCh-like layered structure, and sphere-like morphology. Its 0.1 C discharge capacity rapidly increased with cycle number before 6th cycle and reached the highest value 217 mAh/g at 14th cycle. After 50 cycles its 0.1,0.2 and 0.5 C discharge capacities still retained 191.6,187.8 and 156.2 mAh/g, respectively, showing that the synthesized product had excellent electrochemical performance.