SYNTHESIS AND ELECTROCHEMICAL PERFORMANCE OF LAYERED LiNi0.5Mn0.5O2 CATHODE MATERIAL FOR LITHIUM-ION SECONDARY BATTERIES BY ION-EXCHANGE METHOD
The layered LiNi0.5Mn0.5O2 used as a cathode material for lithium-ion batteries was synthesized by ion-exchange from NaNi0.5Mn0.5O2.The compositions NaNi0.5Mn0.5O2 were synthesized by co-precipitation from the Ni, Mn carbonate precursor which was precipitated by the addition of KHCO3 to an aqueous solution of Ni, Mn sulphates. The powder LiNi0.5Mn0.5O2 was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results showed that the Ni, Mn carbonate precursor heated at 900 ℃ for 5 hours in the air and the NaNi0.5Mn0.5O2 power added to a solution of LiOH 3 times in 240 for 48h had the advantaged performance. ℃ The powder adopted the α-NaFeO2 structure. Galvanostatic charge-discharge behavior of the LiNi0.5Mn0.5O2 batteries in the voltage range 2.5-4.5V at a discharge rate of 0.02A/g exhibited a stable discharge capacity and it was almost without capacity fading after 50 cycles.
YUNJIANG CUI ZHIYONG YU HANXING LIU HUA HAO HAIXIA LIANG XIAOJUN LIU
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology, Wuhan 430070, China
国际会议
The 12th Asian Conference on Solid State Ionics(第十二届亚洲固态离子学会议暨第十五届中国固态离子学会议)
武汉
英文
787-793
2010-05-02（万方平台首次上网日期，不代表论文的发表时间）