Abstract
In this study, Li5Cr7Ti6O25/ multiwalled carbon nanotubes (LCTO@MWCNTs) negative electrode materials were prepared via a sol-gel method. The physical and electrochemical properties of LCTO@MWCNTs (0, 3, 5 and 8 wt%) were systematically investigated. The results show that LCTO@MWCNTs (5 wt%) shows the best electrochemical properties in all samples. Cycled at 6 C, the LCTO@MWCNTs (5 wt%) composite delivers a charge capacity of 129.9 mA h g−1, and the reversible capacity also achieves 123.8 mAh g−1 after 400 cycles in the voltage range of 1.0-3.0V. Nevertheless, the pure LCTO only delivers a capacity of 91.2 mA h g−1 and the capacity only reaches 84.9 mA h g−1 after 400 cycles. The further study results indicate that the prepared LCTO@MWCNTs composites have higher electronic conductivity and lithium diffusion coefficient than the pure LCTO.
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