Abstract
As a promising anode material, lithium titanate (Li4Ti5O12) displays extremely stable cycling and high safety performance. Nevertheless, its application is hindered because of a low electron conductivity and low specific capacity. Herein, dual-phase Li4Ti5O12/TiO2 (LTO/TO) was synthesized by a straightforward solvothermal method utilizing crystallized water of lithium hydroxide to hydrolyse tetrabutyl titanate at high temperature and pressure conditions. This work demonstrated that LTO/TO composites have excellent electrochemical performance and indicated that the inherent defects of LTO can be improved by the decoration of TO. At a current density of 1.0 A g−1 (∼6 C), the discharge capacity of LTO/TO sample reached 197 mAh g−1 after 100 cycles, while LTO exhibited 180 mAh g−1. It appears that nanostructure LTO/TO composites may shorten the diffusion distance of electrons and lithium ions.
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