电化学2012，Vol.18Issue(2)：135-139,5.
碳包覆Na_2Ti_6O_（13）纳米管的电化学性能研究
Electrochemical Performances of Carbon-coated Na_2Ti_6O_（13） Nanotubes
摘要
Abstract
With rutile TiO2 and NaOH as starting materials,the Na2Ti6O13 nanotubes were prepared by a hydrothermal reaction.The carbon-coated Na2Ti6O13 nanotubes were obtained by treating the Na2Ti6O13 nanotubes for 4 h in glucose aqueous solutions containing 0.1 mol·L-1 NaOH.The as-prepared samples were characterized by X-ray diffraction,scanning electron microscopy and transmission electron microcopy.The results showed that the dimensions of carbon-coated Na2Ti6O13 nanotubes were 14~19 nm of outer diameter,2~5 nm of inner diameter,and several hundreds nanometers of length with a carbon layer of about 2 nm being coated on outer surface of the nanotubes.As an anode material for lithium ion battery,the carbon-coated Na2Ti6O13 nanotubes exhibited an excellent cycle performance and high rate discharge capability compared with the Na2Ti6O13 nanotubes.At 50 mA·g-1,the reversible capacities of the carbon-coated Na2Ti6O13 nanotubes were 161 mAh·g-1 in the initial cycle and 147 mAh·g-1 after 100 cycles.When the discharge-charge current density was 1600 mA·g-1,the reversible capacity of the carbon-coated Na2Ti6O13 nanotubes still reached 70 mAh·g-1,much higher than that of Na2Ti6O13 nanotubes.关键词
锂离子电池/负极材料/Na2Ti6O13纳米管/碳包覆/高倍率性能Key words
Li-ion battery/anode material/Na2Ti6O13 nanotubes/carbon-coated/high-rate capability分类
化学化工引用本文复制引用
李国然,孙帅,高学平..碳包覆Na_2Ti_6O_（13）纳米管的电化学性能研究[J].电化学,2012,18(2):135-139,5.基金项目
国家973计划项目 （）
中央高校基本科研业务费专项资金资助 （）
