Effect of Conductive Additives on the Structural and Electrochemical Properties of Li4Ti5O12 Spinel

被引：4

作者：

Park, Jae-Hwan ^{[1
]}

Lee, Seongsu ^{[2
]}

Kim, Sung-Soo ^{[1
]}

Kim, Jong-Huy ^{[3
]}

机构：

[1] Chungnam Natl Uniers, Grad Sch Green Energy Technol, Taejon 305764, South Korea

[2] Korea Atom Energy Res Inst, Div Neutron Sci, Taejon 305353, South Korea

[3] Korea Inst Energy Res, Taejon 305343, South Korea

来源：

BULLETIN OF THE KOREAN CHEMICAL SOCIETY | 2012年 / 33卷 / 12期

关键词：

Lithium ion batteries; Lithium titanate; Carbon additive effect; Neutron diffraction; INSERTION; 2-PHASE; SAFETY; SIZE;

D O I：

10.5012/bkcs.2012.33.12.4059

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effect of a conductive agent on the structural and electrochemical properties of Li4Ti5O12(LTO) spinel was investigated through neutron diffraction during Li intercalation and electrochemical measurements. The charging process of LTO is known as transformation of the white (Li-3)(8a)[LiTi5](16d)O-12 into a dark-colored (Li3-X)(8a)[LiX+Y](16c)[LiTi5](16d)O-12 by incorporating the inserted Li into octahedral 16c sites, and the Li in tetrahedral 8a sites shifted to 16c sites. The occupancy of the tetrahedral 8a site varied with the existence of carbon in the electrode. Without carbon, the lattice parameter and cell volume of LTO decreased more notably than in the carbon-containing LTO electrode during Li insertion process. These phenomena might be attributed that the Li occupancy of the tetrahedral 8a of the LTO electrode without carbon was less than that of the carbon-containing LTO electrode.

引用

页码：4059 / 4062

页数：4

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