关键词: 锂离子电池, LiMn₂O₄, 形貌结构, 正极材料

Abstract: The end products were synthesized with the starting reactors lithium acetate and manganese acetate (in different
mole ratio) dissolved in de-ionic water to form homogeneous solutions, which were evaporated by heating to form solid state mixtures precursors. The
calcination of the precursors in air produces uniformly sized, fine particles of spinel Li_1+xMn₂O₄ as the final active materials. Prepared
from starting reactors lithium acetate and manganese acetate in Li:Mn=1.1:2 and under 850℃, the resultant materials have better electrochemical
characterizations. The reaction mechanism was investigated by TGA and IR spectroscopy. The investigation of the XRD patterns, the analysis of the
morphology and the determination of the electrochemical properties show the resultant particles are fine, narrowly distributed, well crystallized and
honeycomb-like. The charge-discharge data indicate that the resultant material with spinel structure has an initial capacity of 128 mAh/g and a good cycling
performance.

Key words: lithium-ion Batteries, LiMn₂O₄, morphology, cathode materials