Materials Engineering and Interfacial Phenomena
Effect of Particle Size on Electrochemical Properties of LiMn2O4 Powders Prepared by Spray Pyrolysis Method
2008 Volume 34 Issue 6 Pages 594-597
Details
2008 Volume 34 Issue 6 Pages 594-597
Lithium manganese oxide (LiMn2O4) powders have been synthesized by spray yrolysis method from the precursor solution; LiNO3 and Mn(NO3)2·6H2O were stoichiometrically dissolved into distilled water. The as-prepared powders exhibited a pure cubic spinel structure in the X-ray diffraction (XRD) patterns for various precursor concentrations ranging from 0.045 to 0.9 mol/L. While the geometric mean diameter of LiMn2O4 prepared at 0.045 mol/L was 0.57 μm, the one prepared at 0.9 mol/L was 1.11 μm.
The as-prepared samples were used as cathode active materials for lithium batteries. Test experiments in the electrochemical cell Li|1 M LiClO4 in EC : DEC=1 : 1|LiMn2O4 were carried out for various charge-discharge rates at room temperature. The discharge capacity and rate capability of as-prepared samples were strongly affected by the particle size of LiMn2O4.
