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

被引：43

作者：

Lee, Duk Kyu ^{[1
,2
]}

Shim, Hyun-Woo ^{[3
]}

An, Jae Sul ^{[1
]}

Cho, Chin Moo ^{[1
]}

Cho, In-Sun ^{[1
]}

Hong, Kug Sun ^{[1
]}

Kim, Dong-Wan ^{[3
]}

机构：

[1] Seoul Natl Univ, Coll Engn, Dept Mat Sci & Engn, Seoul 151744, South Korea

[2] Dongil Technol Ltd, Ceram Res & Dev Div, Hwasung 445854, South Korea

[3] Ajou Univ, Dept Mat Sci & Engn, Suwon 443749, South Korea

来源：

NANOSCALE RESEARCH LETTERS | 2010年 / 5卷 / 10期

关键词：

Li4Ti5O12; Nanowires; Solvothermal reaction; Capacity retention; Li ion batteries; ELECTROCHEMICAL LITHIUM STORAGE; SPINEL LI4TI5O12;

D O I：

10.1007/s11671-010-9680-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The 0D-1D Lithium titanate (Li4Ti5O12) heterogeneous nanostructures were synthesized through the solvothermal reaction using lithium hydroxide monohydrate (Li(OH)center dot 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.

引用

页码：1585 / 1589

页数：5

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