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Citation: WANG Meng, WU Feng, SU Yue-Feng, CHEN Shi. Electrochemical Characteristics of Y₂O₃-Coated LiCo_1/3Ni_1/3Mn_1/3O₂[J]. Acta Physico-Chimica Sinica, ;2008, 24(07): 1175-1179. doi: 10.3866/PKU.WHXB20080710 shu

Electrochemical Characteristics of Y₂O₃-Coated LiCo_1/3Ni_1/3Mn_1/3O₂

1.
National Development Center of High Technology Green Materials, School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P. R. China

Received Date: 28 January 2008
Available Online: 9 May 2008

LiCo1/3Ni1/3Mn1/3O2 was coated by a layer of Y2O3 via a simple method. The bared sample was immersed into Y(NO3)3·6H2O solution and then calcined at a certain temperature to get the coated material. The coated and bared LiCo1/3Ni1/3Mn1/3O2 meterials were characterized by X-ray diffraction (XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), cyclic voltammetry (CV), and galvanotactic charge-discharge test. It was showed that Y2O3 existed only on the surface, and had no effect on the crystal structure; the LiCo1/3Ni1/3Mn1/3O2 coated with Y2O3 exhibited better capacity retention than the bared LiCo1/3Ni1/3Mn1/3O2 in the higher cutoff voltage and had higher thermal stability. CV results suggested that the Y2O3 coating suppressed the phase transitions and prevented the surface of cathode materials fromdirect contact with the electrolyte.
- LiCo1/3Ni1/3Mn1/3O2; Y2O3; Coating; Lithium-ion battery
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Electrochemical Characteristics of Y2O3-Coated LiCo1/3Ni1/3Mn1/3O2

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通讯作者: 陈斌, bchen63@163.com

Electrochemical Characteristics of Y₂O₃-Coated LiCo_1/3Ni_1/3Mn_1/3O₂