Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 22, Pages 19791-19796Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am504931r
Keywords
Li4Ti5O12/TiO2 composite; nanoflakes; facet control; anode; lithium ion batteries
Funding
- National Basic Research Program [2014CB932102, 2013CB934102]
- National Natural Science Foundation of China [21271128, 21331004, 21301117]
- SJTU-UM
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Li4Ti5O12/TiO2 hollow spheres composed of nanoflakes with preferentially exposed Li4Ti5O12 (011) facets have been successfully fabricated via a facile hydrothermal processing route and following calcination. These hollow spheres show good electrochemical performance in terms of high capacity (266 mAh g(-1) at 0.1 A g(-1)), and excellent rate capability (110 mAh g(-1) at 4.0 A g(-1) up to 100 cycles), attributed to unique morphology, preferred facet orientation of the nanoflakes and microscopic structure of the hollow spheres. The preferentially exposed Li4Ti5O12 (011) facets leads to fast lithium insertion/deinsertion processes in materials because of shorten lithium ion diffusion length, proved to be highly effective in improving the electrochemical properties of the hollow spheres. The excellent electrochemical performance makes these hollow spheres promising anode material for lithium ion batteries with high power and energy densities.
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