In Situ Synthesis of Core-Shell Li4Ti5O（12） @ Polyaniline Composites with Enhanced Rate Performance for Lithium-ion Battery Anodes

The core-shell Li4Ti5O（12） @ 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~（-1）wi...

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Bibliographic Details
Published in:材料科学技术学报：英文版 2017, Vol.33 (3), p.231-238
Main Author: Yani Hui Liyun Cao Zhanwei Xu Jianfeng Huang Haibo Ouyang Jiayin Li Hailing Hu
Format: Article
Language:English
Subjects:
原位合成
可逆容量
核壳
电化学性能
聚苯胺复合材料
负极性能
锂离子电池
高电流密度
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Summary:The core-shell Li4Ti5O（12） @ 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~（-1）with 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~（-1）after 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.
ISSN:1005-0302
1941-1162