材料与冶金学报2006，Vol.5Issue(4)：271-275,5.
电化学合成掺锡多壁纳米碳管及其在锂离子电池中的应用
Electrochemical synthesis of tin-doped multi-walled carbon nanotubes and their application to lithium insertion for Li- battery
许茜 1王莉丽2
作者信息
- 1. 东北大学
- 2. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
- 折叠
摘要
Abstract
Tin-doped multiwall carbon nanotubes ( CNTs ) were prepared by electrolysis in molten salt of LiCl (62%) -NaCl (37% ) -SnCl2 ( 1% ) in mass fraction with a graphite rod as a cathode. TEM and XRD investigations show that structure characteristic of tin-doped CNTs is webs of well - graphitized hollow tubes with outer diameters between 10 and 20 nm with presence of Sn and SnO2. The EDS elementary analysis confirms the content of tin in the products was 9%. Electrochemical Li insertion into the doped CNTs was investigated in a nonaqueous medium. Galvanostatic discharge - charge measurement revealed that their specific capacities of insertion and extraction lithium were 1762 mAh/g and 1 295 mAh/g, respectively, in the first cycle with almost coulomb efficiency of 73%. The coulomb efficiency increased to more than 90% after the ninth cycle, and the reversible capacity was about 210 mAh/g.关键词
carbon nanotube-tin composite/lithium insertion/lithium battery/molten saltKey words
carbon nanotube-tin composite/lithium insertion/lithium battery/molten salt分类
矿业与冶金引用本文复制引用
许茜,王莉丽..电化学合成掺锡多壁纳米碳管及其在锂离子电池中的应用[J].材料与冶金学报,2006,5(4):271-275,5.
