Effects of Co doping on Li[Ni0.5CoxMn1.5-x]O4 spinel materials for 5 V lithium secondary batteries via Co-precipitation

被引：54

作者：

Oh, Sung Woo ^{[1
]}

Myung, Seung-Taek ^{[2
]}

Kang, Han Byeol ^{[1
]}

Sun, Yang-Kook ^{[1
]}

机构：

[1] Hanyang Univ, Dept Chem Engn, Seoul 133791, South Korea

[2] Iwate Univ, Dept Chem Engn, Morioka, Iwate 0208551, Japan

来源：

JOURNAL OF POWER SOURCES | 2009年 / 189卷 / 01期

关键词：

Li[Ni0.5Mn1.5]O-4; 5; V; Positive; Electrode; Lithium; Batteries; ULTRASONIC SPRAY-PYROLYSIS; ELECTROCHEMICAL PROPERTIES; CATHODE MATERIAL; BEHAVIOR; P4(3)32; NI;

D O I：

10.1016/j.jpowsour.2008.08.022

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：

Effect of Co substitution for Mn on Li[Ni0.5CoxMn1.5-x]O-4 was investigated. Co-precipitation was employed to synthesize the [Ni0.25CoxMn0.75-x](OH)(2) as a precursor and it was fired with LiOH at 900 degrees C for 20 h in air. From Rietveld refinement of X-ray diffraction data and scanning electron microscopic examinations, it was found that the as-synthesized Li[Ni0.5CoxMn1.5-x]O-4 were crystallized in cubic spinel structure with Fd3m space group and the final products presented spherical secondary morphology (3 mu m in average). Electrochemical investigation revealed that Co3+ replacement for Mn4+ gave rise to improved rate and cycling performances probably due to the improved electronic conductivity and structural stability achieved by the presence of Co3+ in the spinel Li[Ni0.5CoxMn1.5-x]O-4. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：752 / 756

页数：5

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