Electrochemical Performance of LiNi 0.5-x Zr x Mn 1.5 O 4 (x= 0.00, 0.03, 0.05, 0.10) cathode materials for Lithium-ion Batteries

摘要

LiNi 0.5-x Zr x Mn 1.5 O 4 (x= 0.00, 0.03, 0.05, 0.10) were prepared by a combustion synthesis method. Theresults of X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) reveal that theas-synthesized LiNi 0.5-x Zr x Mn 1.5 O 4 (x=0.00, 0.03, 0.05, 0.10) samples predominantly exist as orderedP4 3 32 space group and the second phase ZrO 2 appears when the Zr content reaches 0.05. Scanningelectron microscopy (SEM) shows that the samples with different Zr content present porousmorphology and have less particle sizes than the bare sample of LiNi 0.5 Mn 1.5 O 4 . The electrochemicalperformances of LiNi 0.5-x Zr x Mn 1.5 O 4 (x=0.00, 0.03, 0.05, 0.10) samples suggest that the cycleperformance and rate capability both at 25°C and 55°C are significantly improved after Zr modifying.