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

Duk Kyu Lee12, Hyun-Woo Shim3, Jae Sul An1, Chin Moo Cho1, In-Sun Cho1, Kug Sun Hong1* and Dong-Wan Kim3*

Author Affiliations

1 Department of Materials Science & Engineering, College of Engineering, Seoul National University, Shillim-dong, San 56-1, Gwanak-gu, Seoul, 151-744, Korea

2 Ceramic Research & Development Division, Dongil Technology Ltd, #215-6, Bukyang-dong, Hwasung, 445-854, Korea

3 Department of Materials Science & Engineering, Ajou University, San 5, Woncheon-dong, Yeongtong-gu, Suwon, 443-749, Korea

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Nanoscale Research Letters 2010, 5:1585-1589  doi:10.1007/s11671-010-9680-4

Published: 21 July 2010


The 0D-1D Lithium titanate (Li4Ti5O12) heterogeneous nanostructures were synthesized through the solvothermal reaction using lithium hydroxide monohydrate (Li(OH)┬ĚH2O) and protonated trititanate (H2Ti3O7) 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 Li4Ti5O12 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 Li4Ti5O12 nanoparticles. The Li4Ti5O12 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.

Li4Ti5O12; Nanowires; Solvothermal reaction; Capacity retention; Li ion batteries