LiNi0.5Mn1.504 prepared by a spray drying method was re-treated in N2 at 500, 600 and 700℃, respec- tively. Their structural and electrochemical properties were studied by means of Fourier transform infrared（FTIR）,...LiNi0.5Mn1.504 prepared by a spray drying method was re-treated in N2 at 500, 600 and 700℃, respec- tively. Their structural and electrochemical properties were studied by means of Fourier transform infrared（FTIR）, X-ray diffraction（XRD）, and charge-discharge tests. The space group of the LiNi0.sMnl.504 transforms from P4332 to Fd3m at an annealing temperature of 700℃. The electrochemical characteristics of the treated samples are closely related to the annealing temperature. The sample treated in N2 at 500℃ shows both an improved rate capability and cyclic performance at a high temperature compared with the as-prepared sample, while the sample treated in N2 at 700℃ shows dramatically decrease in its reversible capacity.展开更多
文摘LiNi0.5Mn1.504 prepared by a spray drying method was re-treated in N2 at 500, 600 and 700℃, respec- tively. Their structural and electrochemical properties were studied by means of Fourier transform infrared（FTIR）, X-ray diffraction（XRD）, and charge-discharge tests. The space group of the LiNi0.sMnl.504 transforms from P4332 to Fd3m at an annealing temperature of 700℃. The electrochemical characteristics of the treated samples are closely related to the annealing temperature. The sample treated in N2 at 500℃ shows both an improved rate capability and cyclic performance at a high temperature compared with the as-prepared sample, while the sample treated in N2 at 700℃ shows dramatically decrease in its reversible capacity.
