Optimal microwave-assisted hydrothermal synthesis of nanosized xLi₂MnO₃路(1聽鈭捖?span style='font-style: italic'>x)LiNi_1/3Co_1/3Mn_1/3O₂ cathode materials for lithium ion battery

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• 作者：Xiaowei Miao ; Yuan Yan ; Chunguang Wang ; Leilei Cui ; Jianhui Fang ; Gang Yang
• 关键词：Lithium ion batteries ; Cathode materials ; Li-rich ; Microwave hydrothermal ; Cyclic performance
• 刊名：Journal of Power Sources
• 出版年：1 February, 2014
• 年：2014
• 卷：247
• 期：Complete
• 页码：219-227
• 全文大小：3247 K

文摘

Li-rich layer-structure xLi₂MnO₃路(1聽鈭捖?em>x)LiNi_1/3Co_1/3Mn_1/3O₂ (x聽=聽0.2, 0.4, 0.6, 0.8) cathode materials have been synthesized by co-precipitation and microwave hydrothermal (MH) method in a short time (鈭?0聽min). The crystal structure is characterized by X-ray diffraction (XRD) patterns, and refined by two sets of diffraction data (R-3m and C2/m). The morphology is characterized by scanning and high-resolution transmission electron microscope (SEM and HRTEM) which shows the average particle size (50-100聽nm). The charge/discharge results indicate xLi₂MnO₃路(1聽鈭捖?em>x)LiNi_1/3Co_1/3Mn_1/3O₂ (x聽=聽0.4) synthesized at 180聽掳C for 60聽min has the best discharge capacity and cyclic performance. Within the cut-off voltage between 2.5 and 4.8聽V, the initial discharge capacity is 325聽mA聽h聽g^鈭? at 0.1聽C rate; and after 50 cycles the discharge capacity remains 234.5聽mA聽h聽g^鈭?. The xLi₂MnO₃路(1聽鈭捖?em>x)LiNi_1/3Co_1/3Mn_1/3O₂ prepared by facile and rapid microwave-assisted hydrothermal (MH) is a promising preparation method in cathode material for lithium ion batteries.