AlPO₄ coated LiNi_1/3Co_1/3Mn_1/3O₂ for high performance cathode material in lithium batteries

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• 作者：Lin Li ; Yuancheng Cao ; Hao Zheng…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：2
• 页码：1925-1930
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1573-482X
• 卷排序：28

文摘

The surface of layered LiNi_1/3Co_1/3Mn_1/3O₂ was coated with AlPO₄ by co-precipitation method and followed by heat treatment. The prepared samples were characterized by XRD and SEM. The samples coated with AlPO₄ exhibited both improved rate and cycle capacity compared with the pristine LiNi_1/3Co_1/3Mn_1/3O₂. Especially, the sample coated with 1 wt% AlPO₄ showed outstanding cyclability. The electrochemical impedance spectroscopy (EIS) results indicated that the AlPO₄ coating layer significantly suppressed the increase of charge-transfer resistance (Rct). The activation energy of the charge transfer processes at the electrode/electrolyte interface was reduced by AlPO₄ coating. These results indicate that AlPO₄ coated LiNi_1/3Co_1/3Mn_1/3O₂ could be a promising cathode material for lithium ion batteries.