Enhanced cycleability of LiCoO₂ coated with vanadium oxides

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• 作者：Jae-Won Lee ; Sun-Min Park ; Hae-Jin Kim
• 关键词：Vanadium oxide ; Lithium-ion battery ; Lithium cobalt oxide ; Sol– ; gel process ; Cycleability ; Melt-quenching method
• 刊名：Journal of Power Sources
• 出版年：2009
• 出版时间：15 March 2009
• 年：2009
• 卷：188
• 期：2
• 页码：583-587
• 全文大小：873 K

文摘

Vanadium oxide (V₂O₅/V₂O₅ hydrates) sol–gel coatings on lithium cobalt oxide (LiCoO₂) are investigated as a means are prepared to improve the cycleability at a high-charge cut-off voltage. The V₂O₅ sol was prepared by a melt-quenching method. The crystal structure and morphology of the samples are examined by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The charge and discharge characteristics, including cycleability, are measured at room temperature, and the electrochemical properties of bare and coated LiCoO₂ are compared. Overall, a vanadium oxide coating on LiCoO₂ improves the cycleability at a high-charge cut-off voltage.