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

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 degrees 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 degrees 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. Copyright (C) 2017, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited.