Morphology and electrochemistry of LiMn2O4 optimized by using different Mn-sources

被引:60
作者
Bao, Shu-Juan
Li, Chang-Ming
Li, Hu-Lin
Luong, John H. T.
机构
[1] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 639798, Singapore
[2] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China
[3] Natl Res Council Canada, Biotechnol Res Inst, Montreal, PQ H4P 2R2, Canada
关键词
lithium-ion batteries; gamma-MnOOH : LiMn2O4; spinel-type; discharge rate; capacity retention;
D O I
10.1016/j.jpowsour.2006.11.015
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
Spinel-typed LiMn2O4 cathode active materials have been prepared for different microstructures by the melt-impregnation method using different forms of manganese. The effect of the starting materials on the microstructure and electrochemical properties of LiMn2O4 is investigated by X-ray diffraction, scanning electron microscopy, and electrochemical measurements. The powder prepared from nanostructured gamma-MnOOH, with good crystallinity and a regular cubic spinel shape, provided an initial discharge capacity of 114 mAh g(-1) with excellent rate and high capacity retention. These advantages render LiMn2O4 attractive for practical and large-scale applications in mobile equipment. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:885 / 889
页数:5
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