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Citation: SU Zhi, XU Mao-Wen, YE Shi-Hai, WANG Yong-Long. Doping of Layered LiMnO₂ as Cathode Materials for Lithium-Ion Batteries and Their Electrochemical Properties[J]. Acta Physico-Chimica Sinica, ;2009, 25(06): 1232-1238. doi: 10.3866/PKU.WHXB20090629 shu

Doping of Layered LiMnO₂ as Cathode Materials for Lithium-Ion Batteries and Their Electrochemical Properties

1.
College of Life Science and Chemistry, Xinjiang Normal University, Urumqi 830054, P. R. China

Received Date: 26 December 2008
Available Online: 13 April 2009

Hydrothermal methods were used to prepare doped LiMxMn1-xO2(M=Mg, Y, Zr) as cathode materials for lithium-ion batteries. The structure and morphology of the as-prepared cathode materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The effects of ion doping on the performance of orthorhombic materials was analyzed in terms of their crystal structure, charge-discharge curves, cycle performance and electrochemical impedance spectroscopy (EIS). Results show that the doped materials had better cycle performance. In particular, the discharge capacity of Li0.99Mn0.979Y0.021O2 remains 226.3 mAh·g-1 after 60 cycles with a current density of 50 mA·g-1 at roomtemperature.
- Layered LiMnO2,
- Doping,
- Hydrothermal synthesis,
- Electrochemical property
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沈阳化工大学材料科学与工程学院沈阳 110142

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Doping of Layered LiMnO2 as Cathode Materials for Lithium-Ion Batteries and Their Electrochemical Properties

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通讯作者: 陈斌, bchen63@163.com

Doping of Layered LiMnO₂ as Cathode Materials for Lithium-Ion Batteries and Their Electrochemical Properties