Comparative studies between oxygen-deficient LiMn2O4 and Al-doped LiMn2O4

被引：28

作者：

Chung, KY ^{[1
]}

Yoon, WS

Lee, HS

Yang, XQ

McBreen, J

Deng, BH

Wang, XQ

Yoshio, M

Wang, R

Gui, J

Okada, M

机构：

[1] Brookhaven Natl Lab, Upton, NY 11973 USA

[2] Saga Univ, Dept Appl Chem, Saga 8408502, Japan

[3] Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China

[4] TOSOH Corp, NANYO Res Lab, Shunan 7498501, Japan

来源：

JOURNAL OF POWER SOURCES | 2005年 / 146卷 / 1-2期

关键词：

LiMn2O4; capacity fading; Al-substitution; phase transition; in situ X-ray diffraction;

D O I：

10.1016/j.jpowsour.2005.03.033

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：

Lithium-rich and Al-doped spinel materials with good capacity retention when cycled at high temperature have been synthesized. These materials have been studied in comparison with oxygen-deficient spinel using X-ray diffraction at room temperature (RT, 25 degrees C) and low temperature (LT, -30 degrees C). The XRD spectra at LT and RT showed that Al-doped spinel materials have superior structural stability against oxygen loss during heat treatment at 660 degrees C under Ar atmosphere. The in situ XRD spectra collected during cycling at high temperature (HT, 55 degrees C) showed that Al-doped spinel materials had better cycle performances and it was closely related to the structural stability against oxygen loss during charge-discharge cycling. Published by Elsevier B.V.

引用

页码：226 / 231

页数：6

共 12 条

[1] Suppression of structural fatigue by doping in spinel electrode probed by in situ bending beam method [J].