Abstract
AbstractIn this study, we have synthesized and characterized Li4Ti5O12 (LTO)‐coated meso‐carbon micro beads (MCMB) as an anode material for Li‐batteries. The surface of MCMB powders was uniformly coated by the LTO nanoparticles to form a core‐shell structure via a sol‐gel process, followed by calcination. The average size of MCMB core was 15 μm while the thickness of LTO shell was 80 to 120 nm. We found that LTO‐coated MCMB had better rate‐capability and cycle life, compared with the pristine MCMB. Electrochemical impedance spectroscopy (EIS) results showed that after 40 cycles, the cell resistance of the LTO‐coated MCMB electrode increased slightly, while that of the pristine MCMB electrode increased significantly. The enhanced performance of the LTO‐coated MCMB electrode is attributed to the LTO coating, which suppresses the increase in the charge‐transfer resistance during prolonged cycle.
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