Electrochemical Behavier of Li4Ti5O12/CNT Composite for Energy Storage
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초록
The Li4Ti5O12/CNT composite is prepared by ultrasound associated sol-gel method. The prepared composite is characterized by SEM, TEM, XRD and TG analysis, and their electrochemical behaviors are investigated by cyclic voltammetry, electrochemical impedance spectroscopy and charge-discharge test in 1M LiBF4/PC electrolyte. From the results, it is identified that the Li4Ti5O12 nanoparticles coated on CNT surface have regular size with around 10~30 nm and spinel-framework structure. At the current rate of 20C, the discharge capacities of Li4Ti5O12/CNT composites with CNT contents of 15, 30 and 50 wt% are 57, 63 and 48mAhg−1, respectively,which have similar value. The improved electrochemical behavior of the Li4Ti5O12/CNT composite
Abstract
The Li4Ti5O12/CNT composite is prepared by ultrasound associated sol-gel method. The prepared composite is characterized by SEM, TEM, XRD and TG analysis, and their electrochemical behaviors are investigated by cyclic voltammetry, electrochemical impedance spectroscopy and charge-discharge test in 1M LiBF4/PC electrolyte. From the results, it is identified that the Li4Ti5O12 nanoparticles coated on CNT surface have regular size with around 10~30 nm and spinel-framework structure. At the current rate of 20C, the discharge capacities of Li4Ti5O12/CNT composites with CNT contents of 15, 30 and 50 wt% are 57, 63 and 48mAhg−1, respectively,which have similar value. The improved electrochemical behavior of the Li4Ti5O12/CNT composite
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