In Situ Synthesis of Core-Shell Li4Ti5O12@Polyaniline Composites with Enhanced Rate Performance for Lithium-ion Battery Anodes

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2017,（3）
• 页码范围: 231-238
• 页数: 8页
• 语种: 英文

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-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 031％ 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.