Orientation-Dependent Arrangement of Antisite Defects in Lithium Iron(II) Phosphate Crystals

被引:77
作者
Chung, Sung-Yoon [1 ,2 ]
Choi, Si-Young [3 ,4 ]
Yamamoto, Takahisa [5 ,6 ]
Ikuhara, Yuichi [4 ]
机构
[1] Inha Univ, Dept Mat Sci & Engn, Inchon 402751, South Korea
[2] Nalphates LLC, St Petersburg 198013, Russia
[3] Korea Inst Mat Sci, Chang Won 641831, South Korea
[4] Univ Tokyo, Inst Engn Innovat, Tokyo 1138656, Japan
[5] Univ Tokyo, Dept Adv Mat Sci, Tokyo 11138656, Japan
[6] Fine Ceram Ctr, Nanostruct Res Lab Japan, Nagoya, Aichi 4568587, Japan
关键词
antisite defects; crystal engineering; electron microscopy; solid-state structures; LIFEPO4; DIFFRACTION; BATTERIES; OLIVINE; CONDUCTIVITY; TRANSITION; MICROSCOPY; DIFFUSION; CAPACITY; LATTICE;
D O I
10.1002/anie.200803520
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
(Figure Presented) Aggregated antisite cations of iron (see picture, red) in the lithium sites of doped lithium iron phosphate (LiFePO4) are arranged preferentially along the b axis. To probe the peculiar array of the defects, Z-contrast STEM with a spherical-aberration correction is utilized. The images obtained using Z-contrast STEM suggest that the distribution of antisite defects in LiFePO4 can be adjusted for improved lithium ion transport. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.
引用
收藏
页码:543 / 546
页数:4
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