Lee Yongho, Kim Dong-won, Lee Joong Kee, Choi Wonchang
J Nanosci Nanotechnol. 2015 Sep;15(9):7049-53. doi: 10.1166/jnn.2015.10523.
The surface-coating of carbon was performed on the spinel Li4Ti5O12 materials for the electrochemical sodium insertion in sodium ion battery application. The carbon-coated Li4Ti5O12 was synthesized by using the citric acid sol-gel method. Carbon-coated Li4Ti5O12 exhibits superior cycle performance as well as the rate capability in comparison to the pristine Li4Ti5O12. Electrochemical impedance spectroscopy analyses also reveal that surface modification with carbon suppresses the increase in resistance concerning charge transfer reaction as well as solid electrolyte interface layer formation during cycle test.
在用于钠离子电池应用中电化学嵌入钠的尖晶石Li4Ti5O12材料上进行了碳表面包覆。采用柠檬酸溶胶 - 凝胶法合成了碳包覆的Li4Ti5O12。与原始的Li4Ti5O12相比，碳包覆的Li4Ti5O12表现出优异的循环性能和倍率性能。电化学阻抗谱分析还表明，用碳进行表面改性可抑制循环测试期间电荷转移反应以及固体电解质界面层形成过程中电阻的增加。
