High energy density lithium ion batteries using Li_2.6Co_0.4 − x

详细信息    查看全文

• 作者：Daliang Liu ; Shiying Zhan ; Gang Chen ; Wencheng Pan ; Chunzhong Wang ; Yingjin Wei
• 关键词：thium ion battery ; Lithium cobalt nitride ; Vanadium oxide ; Electrical properties ; Electronic materials
• 刊名：Materials Letters
• 出版年：2008
• 出版时间：15 October 2008
• 年：2008
• 卷：62
• 期：26
• 页码：4210-4212
• 全文大小：478 K

文摘

Li_2.6Co_0.4 - xCu_xN (x = 0, 0.15) anode materials were prepared by conventional solid state reaction. Between both materials, Li_2.6Co_0.25Cu_0.15N exhibited better capacity retention than that of Li_2.6Co_0.4N. According to electrochemical impedance spectroscopy, the better cycling behavior of Li_2.6Co_0.25Cu_0.15N has been attributed to the improvement in interfacial compatibility between the electrode and electrolyte interface. A possible explanation to this was given. Li_2.6Co_0.4 - xCu_xN/Cu_0.04V₂O₅ full-cells were assembled to investigate the reliability of Li_2.6Co_0.4 - xCu_xN anode materials in practical applications. The Li_2.6Co_0.25Cu_0.15N/Cu_0.04V₂O₅ cell delivered a specific capacity of 260 mA h g^− 1, and a specific energy of 505.7 mW h g^− 1, which was much higher than that of C/LiCoO₂ lithium ion batteries.