In Situ Synthesis of Core-Shell Li4Ti5O12 @ Polyaniline Composites with Enhanced Rate Performance for Lithium-ion Battery Anodes
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2017年第3期
论文作者：Yani Hui Liyun Cao Zhanwei Xu Jianfeng Huang Haibo Ouyang Jiayin Li Hailing Hu
文章页码：231 - 238
摘 要：The core-shell Li4Ti5O12 @ polyaniline composites（LP） have been synthesized via an in situ synthesis with different mole ratios（25:1, 50:1 and 100:1, aniline:LTO）. As an anode material of lithium-ion batteries,the LP-2 electrodes（50:1） exhibit a high initial reversible capacity of 205 mAh g-1with an initial coulombic efficiency of 97.6% at 0.1 C. Even at a high current density of 10 C, the reversible capacity of the LP-2 electrodes still remains at 102 mAh g-1. Moreover, the LP-2 electrodes retain an impressive high capacity of 161 mAh g-1after 100 cycles at 1 C, with 0.11% capacity fading per cycle. The promising electrochemical performance may be attributed to the significantly decreasing charge-transfer impedance of the LP composite and reductive polarity difference between the cathode and the electrolyte.
Yani Hui，Liyun Cao，Zhanwei Xu，Jianfeng Huang，Haibo Ouyang，Jiayin Li，Hailing Hu
School of Materials Science & Engineering, Shaanxi University of Science and Technology
摘 要：The core-shell Li4Ti5O12 @ polyaniline composites（LP） have been synthesized via an in situ synthesis with different mole ratios（25:1, 50:1 and 100:1, aniline:LTO）. As an anode material of lithium-ion batteries,the LP-2 electrodes（50:1） exhibit a high initial reversible capacity of 205 mAh g-1with an initial coulombic efficiency of 97.6% at 0.1 C. Even at a high current density of 10 C, the reversible capacity of the LP-2 electrodes still remains at 102 mAh g-1. Moreover, the LP-2 electrodes retain an impressive high capacity of 161 mAh g-1after 100 cycles at 1 C, with 0.11% capacity fading per cycle. The promising electrochemical performance may be attributed to the significantly decreasing charge-transfer impedance of the LP composite and reductive polarity difference between the cathode and the electrolyte.
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