Abstract
Abstract Spinel Li 4 Ti 5 O 12 /Fe 2 O 3 composites were prepared by a facile hydrolysis method combined with further heat-treatment. The structure and electrochemical performance of the Li 4 Ti 5 O 12 /Fe 2 O 3 material were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and charge–discharge tests. Electrochemical measurements demonstrated that the Fe 2 O 3 modified Li 4 Ti 5 O 12 anode material showed obviously improved high rate performance with discharge capacity of 109.4 mA h/g at 10 C. The Li 4 Ti 5 O 12 /Fe 2 O 3 anode also showed superior cycling stability with an initial discharge capacity of 145.3 mA h/g at 2 C rate and maintained 93% of its initial capacity after 300 cycles.
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