Relationship between the electrochemical and particle properties of LiMn2O4 prepared by ultrasonic spray pyrolysis

被引:135
作者
Matsuda, K [1 ]
Taniguchi, I [1 ]
机构
[1] Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Chem Engn, Meguro Ku, Tokyo 1528552, Japan
关键词
LiMn2O4; spray pyrolysis; particle properties; lithium batteries; cathode materials;
D O I
10.1016/j.jpowsour.2004.01.019
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 LiMnO4 particles were successfully synthesized by an ultrasonic spray pyrolysis method from the precursor solutions; various combinations of nitrate, acetates or formats of lithium and manganese were stoichiometrically dissolved in distilled water. The product characteristics, such as crystallinity, specific surface area, particle morphology and interior structure of particles, were examined with X-ray diffraction (XRD), the Brunauer-Emmet-Teller (BET) method, field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). All the samples exhibited a pure cubic spinel structure without any impurities in the XRD patterns, while the surface morphology of as-prepared powders was classified into four patterns and the interior structure three patterns. The as-prepared samples were then used as cathode active materials for lithium-ion battery, and electrochemical studies were carried out on the charge/discharge characteristics of the Li/LiMn2O4 cells. The effect of LiMn2O4 particle properties such as crystallite size, specific surface area and particle morphology on the electrochemical properties were also discussed in details. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:156 / 160
页数:5
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