Effect of Foreign Metal on Electrochemical Properties of C/LiMnPO₄ Powders Synthesized by Spray Pyrolysis

Abstract

Spherical C/LiMn 1-X M X PO 4 (M=Mg, Zn X=0, 0.01, 0.05, 0.10) precursor powders were successfully prepared by ultrasonic spray pyrolysis. The C/LiMn 1-X M X PO 4 were obtained by heating at 973 K for 3 hours under argon/hydrogen (5%) atmosphere. The crystal phases of all samples had an olivine structure with a Pmnb space group and the impurity phase peak was not observed. The average particle size was approximately 0.7 µm. The electrochemical properties of the C/LiMn 1-X M X PO 4 cathode were estimated by the rechargeable capacity and cycle performance. Electrochemical measurement revealed that the discharge capacity was improved by doping foreign metal such as Mg and Zn ion. The first discharge capacity of C/LiMn 1-X Zn X PO 4 (X = 0.1) cathode was approximately 60 mAh/g at 0.1 C. It was steady cycling characteristics.

Preparation and Electrochemical Properties of LiMnPO₄ Nanoparticles by Polyol Method

“…For the comparison, spherical C/LiMnPO 4 particles with 0.7 µm and carbon of 20 mass% were also used as a cathode material in order to investigate the effect of particles size on the electrochemical properties. Spherical C/LiMnPO 4 particles were prepared by spray pyrolysis [8]. Fig.…”