Direct Observation of Lithium Staging in Partially Delithiated LiFePO4 at Atomic Resolution

被引：224

作者：

Gu, Lin ^{[1
,3
]}

Zhu, Changbao ^{[2
]}

Li, Hong ^{[3
]}

Yu, Yan ^{[2
]}

Li, Chilin ^{[2
]}

Tsukimoto, Susumu ^{[1
]}

Maier, Joachim ^{[2
]}

Ikuhara, Yuichi ^{[1
,4
,5
]}

机构：

[1] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

[2] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[4] Japan Fine Ceram Ctr, Nanostruct Res Lab, Nagoya, Aichi 4568587, Japan

[5] Univ Tokyo, Inst Engn Innovat, Tokyo 1138656, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 13期

基金：

日本学术振兴会;

关键词：

ELECTRON-MICROSCOPY; DYNAMICS; ENERGY; TEMPERATURE; DIFFRACTION; TRANSPORT; CAPACITY; CATHODE; CARBON; FE;

D O I：

10.1021/ja109412x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Lithium ions in LiFePO4 were observed directly at atomic resolution by an aberration-corrected annular-bright-field scanning transmission electron microscopy technique. In addition, it was found in partially delithiated LiFePO4 that the remaining lithium ions preferably occupy every second layer, along the b axis, analogously to the staging phenomenon observed in some layered intercalation compounds. This new finding challenges previously proposed LiFePO4/FePO4 two-phase separation mechanisms.

引用

页码：4661 / 4663

页数：3

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