标题：C@TiO2nanocomposites with impressive electrochemical performances as anode material for lithium-ion batteries
作者：Chen, Jin ;Li, Yong ;Mu, Jiechen ;Zhang, Yufei ;Yu, Zuoyang ;Han, Kairu ;Zhang, Lipeng
作者机构：[Chen, Jin ;Li, Yong ;Mu, Jiechen ;Zhang, Yufei ;Yu, Zuoyang ;Han, Kairu ;Zhang, Lipeng ] School of Chemistry and Chemical Engineering, Shandong Unive 更多
来源：Journal of Alloys and Compounds
摘要：C@TiO2nanocomposites as lithium-ion battery anode material have been synthesized through a typical solvothermal process. A series of characterization methods, such as scanning electron microscopy, field emission transmission electron microscopy, and X-ray photoelectron spectroscopy, has been used to determine the microstructures and chemical compositions of the C@TiO2nanocomposites. The electrochemical performances were investigated by the LAND battery testing system and electrochemical workstation. Results showed that the size of the C@TiO2nanoparticles is approximately 21–55 nm and the titanium dioxide (TiO2) nanoparticles are wrapped by the carbon layer containing an amount of graphitic carbon, of which the carbon source originated from the esterification reaction in the presence of KCl. An amount of graphitic carbon layers significantly ameliorated the electrical conductivity of the C@TiO2nanocomposites and alleviated the volume expansion of TiO2during the discharge–charge cycles, resulting in the C@TiO2nanocomposites having a satisfactory reversible charge capacity of 237 mA h g−1after 100 long cycles at the current density of 0.1 A g−1and an impressive rate capability with the charge capacity of 176.5 mA h g−1even at the high current density of 1.6 A g−1.
© 2018 Elsevier B.V.