Coexistence of layered and cubic rocksalt structures with a common oxygen sublattice in Li1.2Mn0.4Fe0.4O2 particles:: A transmission electron microscopy study

被引：41

作者：

Kikkawa, Jun ^{[1
]}

Akita, Tomoki ^{[1
]}

Tabuchi, Mitsuharu ^{[1
]}

Shikano, Masahiro ^{[1
]}

Tatsumi, Kuniaki ^{[1
]}

Kohyama, Masanori ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Inst Ubiquitous Energy Devices, Osaka 5638577, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 10期

关键词：

D O I：

10.1063/1.2931002

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Local crystal structures associated with nanoscale variations of the concentration ratio of Fe ions to Mn ions in each single Li1.2Mn0.4Fe0.4O2 particle have been studied by nanobeam electron diffraction, high-resolution transmission electron microscopy, and electron energy-loss spectroscopy combined with scanning transmission electron microscopy. We have found the direct evidence that the Li1.2Mn0.4Fe0.4O2 particle is comprised of Mn-rich nanodomains with the layered rocksalt structure and Fe-rich nanodomains with the cubic rocksalt structure featured by the cation short-range order, within a common oxygen lattice framework of the cubic close-packed structure. Possible oxygen-centered octahedra in the present material are suggested. We discuss both origin and stability of the chemical-nanodomain structure. (C) 2008 American Institute of Physics.

引用

页数：10

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