Modification of ZrO2-Coated Li[Li0.2Ni0.2Mn0.6]O2

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Abstract

The Li-rich layered Li[Li_0.2Ni_0.2Mn_0.6]O₂ was prepared by co-precipitation and solid state reaction method, then coated with ZrO₂ (Zr(OC₃H₇)₄ as coating source). The X-ray diffraction (XRD), transmission electron microscope (TEM) techniques, and galvanostatic charge-discharge tests were used to investigate the effect of ZrO₂ coating on the crystal structures, morphology and electrochemical performance of Li-rich material Li[Li_0.2Ni_0.2Mn_0.6]O₂. The results showed that ZrO₂ particles was homogeneously covered on the surface of Li[Li_0.2Ni_0.2Mn_0.6]O₂, and the electrochemical performance was improved after ZrO₂ coating, the 0.5% ZrO₂ coated sample exhibited superior cycle performance and rate capability among the samples,The 0.5% ZrO₂-coated Li[Li_0.2Ni_0.2Mn_0.6]O₂ sample delivered initial discharge capacity of 250.8 mAh·g^-1 at 20 mA·g^-1 (0.1 C) in the range of 2.0 to 4.8 V, the discharge capacity maintained 201.6 mAh·g^-1after 45 cycles at 0.2 C,and the discharge capacity at 2.0 C rate attained 123.2 mAh·g^-1.

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	Articles by authors
	Su Yinli
	Wang Dan
	Chen Li
	Shan Zhongqiang

Keywords： lithium ion battery； Li-rich cathode； layered structure； ZrO₂ coating

Received 2013-05-03;

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Cite this article:

Su Yinli, Wang Dan, Chen Li, Shan Zhongqiang.Modification of ZrO₂-Coated Li[Li_0.2Ni_0.2Mn_0.6]O₂[J] Chemcial Industry and Engineering, 2015,V32(4): 30-33

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