Fe-rich and Mn-rich nanodomains in Li1.2Mn0.4Fe0.4O2 positive electrode materials for lithium-ion batteries

被引：46

作者：

Kikkawa, J. ^{[1
]}

Akita, T. ^{[1
]}

Tabuchi, M. ^{[1
]}

Shikano, M. ^{[1
]}

Tatsumi, K. ^{[1
]}

Kohyama, M. ^{[1
]}

机构：

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

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 05期

关键词：

D O I：

10.1063/1.2757587

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors investigated the distribution and local valence states of transition metal ions in a positive electrode material for lithium-ion batteries, Li1.2Mn0.4Fe0.4O2 nanoparticles, by electron energy-loss spectroscopy combined with scanning transmission electron microscopy. The experiments clarified the coexistence of Mn-rich and Fe-rich nanodomains in each single particle, and it is found that Fe-rich nanodomains contain Mn3+ ions which should be active in a redox reaction in spite of previous views of inactive Mn4+ ions in this material. The authors discuss a redox mechanism associated with the nanodomains. (C) 2007 American Institute of Physics.

引用

页数：3

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