Significant effect of electron transfer between current collector and active material on high rate performance of Li_4Ti_5O_(12)  

作　　者：潘慧霖 胡勇胜 李泓 陈立泉 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences

出　　处：《Chinese Physics B》2011年第11期9-12,共4页中国物理B（英文版）

基　　金：supported by the "Hundred Talent Project" of the Chinese Academy of Sciences;the National High Technology Research and Development Program of China(Grant No.2009AA033101);the National Basic Research Program of China(Grant Nos.2007CB936500 and 2010CB833102);the National Natural Science Foundation of China(Grant No.50972164);the Science and Technology Planning Project of Guangdong Province,China(Grant No.2010A090602001);the Knowledge Innovation Program of the Chinese Academy of Sciences(Grant No.KJCX2-YW-W26)

摘　　要：The rate and cycling performances of the electrode materials are affected by many factors in a practical complicated electrode process. Learning about the limiting step in a practical electrochemical reaction is very important to effectively improve the electrochemical performances of the electrode materials. Li4Ti5O12, as a zero-strain material, has been considered as a promising anode material for long life Li-ion batteries. In this study, our results show that the Li4Ti5O12 pasted on Cu or graphite felt current collector exhibits unexpectedly higher rate performance than on A1 current collector. For Li4Ti5O12, the electron transfer between current collector and active material is the critical factor that affects its rate and cycling performances.The rate and cycling performances of the electrode materials are affected by many factors in a practical complicated electrode process. Learning about the limiting step in a practical electrochemical reaction is very important to effectively improve the electrochemical performances of the electrode materials. Li4Ti5O12, as a zero-strain material, has been considered as a promising anode material for long life Li-ion batteries. In this study, our results show that the Li4Ti5O12 pasted on Cu or graphite felt current collector exhibits unexpectedly higher rate performance than on A1 current collector. For Li4Ti5O12, the electron transfer between current collector and active material is the critical factor that affects its rate and cycling performances.

关 键 词：LI4TI5O12 current collector electron transfer Li-ion batteries 

分 类 号：O611.3[理学—无机化学]