Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Synthesis of Heterogeneous Li4Ti5O12 Nanostructured Anodes with Long-Term Cycle Stability | Nanoscale Res Lett 2010 5 1585-1589 DOI s11671-010-9680-4 NANO EXPRESS Synthesis of Heterogeneous Li4Ti5Oi2 Nanostructured Anodes with Long-Term Cycle Stability Duk Kyu Lee Hyun-Woo Shim Jae Sul An Chin Moo Cho In-Sun Cho Kug Sun Hong Dong-Wan Kim Received 26 April 2010 Accepted 29 June 2010 Published online 21 July 2010 The Author s 2010. This article is published with open access at Abstract The 0D-1D Lithium titanate Li4Ti5O12 heterogeneous nanostructures were synthesized through the solvothermal reaction using lithium hydroxide monohydrate Li OH -H2O 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. Keywords Li4Ti5O12 Nanowires Solvothermal reaction Capacity retention Li ion batteries D. K. Lee J. S. An C. M. Cho . Cho K. S. Hong Department of Materials Science Engineering College of Engineering Seoul National University Shillim-dong San 56-1 Gwanak-gu Seoul 151-744 Korea e-mail kshongss@ D. K. Lee Ceramic Research Development Division Dongil Technology Ltd 215-6 Bukyang-dong Hwasung 445-854 Korea . Shim . Kim Department of Materials Science Engineering Ajou University San 5 Woncheon-dong Yeongtong-gu Suwon 443-749 Korea e-mail dwkim@ Introduction To date the preparation of inorganic nanostructures with controlled shape composition and desired functions has been explored for the application .
