Abstract
In this study, a simple targeted etching approach was developed for the controlled fabrication of mesoporous Li4Ti5O12 (LTO) hollow spheres, which can be used as an advanced anode material in lithium-ion batteries. We investigated the controllable synthesis of mesoporous LTO hollow spheres with various hollow structures based on different compositions, such as yolk-shelled and hollow structures with porous shells. The as-prepared mesoporous LTO hollow spheres had several main structural advantages, including high intrinsic interfacial reactivity with the electrolyte due to a high specific surface area, extra space for the storage of lithium ions, and reduced transport path lengths for both e– and Li+, thereby leading to excellent rate performance. Moreover, the high reversible capacity of the mesoporous LTO hollow spheres was 229.2 mA h g−1 after 1000 cycles at 0.5C and the highest rate discharge capacity was 114.2 mA h g−1 at 10 C, thereby indicating the outstanding cycle stability and rate performance of LTO as an anode in lithium-ion batteries.
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