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 batte...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.展开更多
基金supported by the “973” Special Preliminary Study Plan (No. 2014CB260411)the National Key Technology R&D Program (No. 2013BAF09B02)+2 种基金the National Natural Science Foundation of China (No. 51472152)the Innovation Team Assistance Foundation of Shaanxi Province (No. 2013KCT-06)the Graduate Innovation Fund of Shaanxi University of Science and Technology
文摘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.
