HAN Yaocong 1, 2 , CUI Xuemin 2 , ZHAO Yanfei 1 , LI Puliang 3 , LI Huacheng 3
(1.School of Chemistry and Chemical Engineering, Guangxi Normal University for Nationalities, Chongzuo 532200, Guangxi, China;
2. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, Guangxi, China; 3.CITIC Dameng Mining
Industries Limited, Nanning 530028, Guangxi, China)
Abstract: Spinel LiMn2O4 samples were prepared from electrolytic manganese dioxide (type P), electrolytic manganese dioxide with low sodium content and high purity Mn3O4 respectively. The properties and structure of the manganese sources and the LiMn2O4 products were determined by ICP,laser scattering particle size distribution analyzer, surface area analyzer, X-ray diffraction and scanning electron microscope. Electrical properties of theLiMn2O4 products were also studied by electrochemical measurements. The results show that the reaction activity of electrolytic manganese dioxide with low sodium content and high purity Mn3O4 was higher than electrolytic manganese dioxide (type P). The LiMn2O4 prepared by electrolytic manganese dioxide with low sodium content and high purity Mn3O4 had better cycle behavior at 55 °C with the capacity retention of 78.2% at the 400th cycle.
Key words: cathode; manganese sources; spinel lithium manganese; electrical properties