Investigation on lithium de-intercalation mechanism for LiNi0.45Mn0.45Al0.1O2

被引：6

作者：

Kobayashi, Hironori ^{[1
]}

Arachi, Yoshinori

Emura, Shuichi

Tatsumi, Kuniaki

机构：

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

[2] Kansai Univ, Fac Engn, Unit Chem, Osaka 5648680, Japan

[3] Osaka Univ, Inst Sci & Ind Res ISIR, Osaka 5670047, Japan

来源：

SOLID STATE IONICS | 2007年 / 178卷 / 15-18期

关键词：

Li secondary battery; Al-cloped layered oxides; synchrotron XRD measurements; XANES measurements;

D O I：

10.1016/j.ssi.2007.05.003

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Li1-y,Ni-0.45 Mn0.45Al0.1O2 was synthesized and characterized using both XRD and XANES measurements. The Li/Li1-y,Ni0.45Mn0.45Al0.1O2 cell showed a discharge capacity of 125 mAh/g in the voltage range 4.5-2.5 V. The Ni K and L-II.III-edge XANES results indicated that the Li deintercalation from LiNi0.45Mn0.45Al0.1O2, proceeded mainly by the valence state change of Ni ions over the whole composition range. Structural analysis clarified that most of the Li ions and a small fraction of the Nj ions migrated from the octahedral 3a site to the tetrahedral 6c site with Li de-intercalation. This observed structural change was similar to that of Li I 1-yNi0.5Mn0.5O2,, indicating that this structural change is characteristic in the Li(NiMn)O-2 system. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1101 / 1105

页数：5

共 19 条

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