Improvement of electrochemical properties of LiNi0.5Mn1.5O4 spinel material by fluorine substitution

被引：105

作者：

Oh, Sung-Woo ^{[1
]}

Park, Sang-Ho ^{[1
]}

Kim, Jung-Hyun ^{[1
]}

Bae, Young Chan ^{[1
]}

Sun, Yang-Kook ^{[1
]}

机构：

[1] Hanyang Univ, Dept Chem Engn, Ctr Informat & Commun Mat, Seoul 133791, South Korea

来源：

JOURNAL OF POWER SOURCES | 2006年 / 157卷 / 01期

关键词：

lithium secondary battery; cathode material; spray pyrolysis; 5 V spinel; fluroine substitution; rate capability;

D O I：

10.1016/j.jpowsour.2005.07.056

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：

LiNi0.5Mn1.5O4-xFx (0 <= x <= 0.1) cathodes, synthesized by ultrasonic spray pyrolysis at 900 degrees C, exhibit superior structural and electrochemical properties. The samples are characterized by X-ray diffraction, scanning electron microscopy, differential scanning calorimetry, and electrochemical measurements. During Li+ extraction, LiNi0.5Mn1.5O4Fx, has a smaller lattice variation and area-specific impedance than LiNi0.5Mn1.5O4. This enhances the rate capability, especially at high C-rates. LiNi0.5Mn1.5O4-xFx also exhibits better resistance than LiNi0.5Mn1.5O4 to attack by HF. (c) 2005 Elsevier B.V All rights reserved.

引用

页码：464 / 470

页数：7

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