Effects of synthesis on electrochemical, structural and physical properties of solution phases of Li2MnO3-LiNi1-xCoxO2

被引：47

作者：

Whitfield, PS ^{[1
]}

Niketic, S ^{[1
]}

Davidson, IJ ^{[1
]}

机构：

[1] Natl Res Council Canada, Inst Chem Proc & Environm Technol, Ottawa, ON K1A 0R6, Canada

来源：

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

关键词：

Li2MnO3; chelating agents; electrochemical;

D O I：

10.1016/j.jpowsour.2005.03.077

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：

A study of the effect of synthesis techniques and conditions on the electrochemical, structural and physical properties of solution phases of Li2MnO3 and LiNi(1-x)CoxO(2) is reported. In this system, the formal oxidation state of the manganese is +4, while that of the nickel and cobalt is +3. These materials were produced from a variety of precursors and chelating agents. Modifications in the synthesis were found to affect the microstructure of the products and their electrochemical performance. It is demonstrated that, with good compositional and microstructural control, solution phases of Li2MnO3 and LiN1-xCoxO2 can have stable discharge capacities as high as 240 mAh g(-1). Furthermore, it has been found that a solution phase of Li2MnO3 and LiNi1-xCoxO2, having no nickel content, LiNi(1-x)Co(x)O2, can produce very high discharge capacities (similar to 235 mAh g(-1)) when charged to voltages greater than 4.3 V, despite an apparent theoretical capacity of only 125 mAh g(-1). Crown Copyright (c) 2005 Published by Elsevier B.V. All rights reserved.

引用

页码：617 / 621

页数：5

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