Significant effect of electron transfer between current collector and active material on high rate performance of Li4Ti5O12

doi:10.1088/1674-1056/20/11/118202

中国物理B ›› 2011, Vol. 20 ›› Issue (11): 118202-118202.doi: 10.1088/1674-1056/20/11/118202

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Significant effect of electron transfer between current collector and active material on high rate performance of Li₄Ti₅O₁₂

潘慧霖, 胡勇胜, 李泓, 陈立泉

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2011-09-25 修回日期:2011-10-08 出版日期:2011-11-15 发布日期:2011-11-15

Significant effect of electron transfer between current collector and active material on high rate performance of Li₄Ti₅O₁₂

Pan Hui-Lin (潘慧霖), Hu Yong-Sheng (胡勇胜), Li Hong (李泓), Chen Li-Quan (陈立泉)

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2011-09-25 Revised:2011-10-08 Online:2011-11-15 Published:2011-11-15

摘要/Abstract

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 Al current collector. For Li₄Ti₅O₁₂, the electron transfer between current collector and active material is the critical factor that affects its rate and cycling performances.

Abstract: 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 Al current collector. For Li₄Ti₅O₁₂, the electron transfer between current collector and active material is the critical factor that affects its rate and cycling performances.

Key words: Li₄Ti₅O₁₂, current collector, electron transfer, Li-ion batteries

中图分类号: (Lithium-ion batteries)

82.47.Aa

73.40.-c (Electronic transport in interface structures) 77.84.Cg (PZT ceramics and other titanates)

潘慧霖, 胡勇胜, 李泓, 陈立泉. Significant effect of electron transfer between current collector and active material on high rate performance of Li₄Ti₅O₁₂[J]. 中国物理B, 2011, 20(11): 118202-118202.

Pan Hui-Lin (潘慧霖), Hu Yong-Sheng (胡勇胜), Li Hong (李泓), Chen Li-Quan (陈立泉). Significant effect of electron transfer between current collector and active material on high rate performance of Li₄Ti₅O₁₂[J]. Chin. Phys. B, 2011, 20(11): 118202-118202.

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Significant effect of electron transfer between current collector and active material on high rate performance of Li₄Ti₅O₁₂

Significant effect of electron transfer between current collector and active material on high rate performance of Li₄Ti₅O₁₂

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