Effect of Synthesis Conditions on the Structure and Electrochemical Properties of LiNi1/2Mn1/2O2 by Sol Gel Method

Zhi Yong Yu; Han Xing Liu

doi:10.4028/www.scientific.net/AMR.399-401.1447

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 399-401Effect of Synthesis Conditions on the Structure...

Effect of Synthesis Conditions on the Structure and Electrochemical Properties of LiNi_1/2Mn_1/2O₂ by Sol Gel Method

Abstract:

The layered LiNi_1/2Mn_1/2O₂ cathode materials were synthesized by a sol gel method. The effects of calcination temperature and time on the structural and electrochemical properties of the LiNi_1/2Mn_1/2O₂ were investigated. The prepared samples were characterized by X-ray diffraction (XRD) and electrochemical analysis. The results revealed that the layered LiNi_1/2Mn_1/2O₂ material could be optimal synthesized at temperature of 900°C for 10h. The sample prepared under the above conditions has the highest initial discharge capacity of 151 mAh/g and showed no dramatic capacity fading during 20 cycles between 2.5-4.5V at a current rate of 20mA/g.