Synthesis of Heterogeneous Li4Ti5O12 Nanostructured Anodes with Long-Term Cycle Stability

Ceramic Research & Development Division, Dongil Technology Ltd, #215-6, Bukyang-dong, Hwasung, 445-854 Korea
Nanoscale Research Letters (Impact Factor: 2.48). 10/2010; 5(10):1585-1589. DOI: 10.1007/s11671-010-9680-4
Source: PubMed

ABSTRACT The 0D-1D Lithium titanate (Li(4)Ti(5)O(12)) heterogeneous nanostructures were synthesized through the solvothermal reaction using lithium hydroxide monohydrate (Li(OH)·H(2)O) and protonated trititanate (H(2)Ti(3)O(7)) nanowires as the templates in an ethanol/water mixed solvent with subsequent heat treatment. A scanning electron microscope (SEM) and a high resolution transmission electron microscope (HRTEM) were used to reveal that the Li(4)Ti(5)O(12) powders had 0D-1D heterogeneous nanostructures with nanoparticles (0D) on the surface of wires (1D). The composition of the mixed solvents and the volume ratio of ethanol modulated the primary particle size of the Li(4)Ti(5)O(12) nanoparticles. The Li(4)Ti(5)O(12) heterogeneous nanostructures exhibited good capacity retention of 125 mAh/g after 500 cycles at 1C and a superior high-rate performance of 114 mAh/g at 20C.

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    ABSTRACT: Lithium titanate (Li4Ti5O12) has emerged as a promising anode material for lithium-ion (Li-ion) batteries. The use of lithium titanate can improve the rate capability, cyclability, and safety features of Li-ion cells. This literature review deals with the features of Li4Ti5O12, different methods for the synthesis of Li4Ti5O12, theoretical studies on Li4Ti5O12, recent advances in this area, and application in Li-ion batteries. A few commercial Li-ion cells which use lithium titanate anode are also highlighted.
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