Structural and electrochemical properties of ICP/LiMn2O4 composite cathodes

Abstract

PPy/LiMn2O4 composites were prepared by chemical synthesis of pyrrole monomer onto LiMn2O4 powder in the presence of dodecyl bezenesufonic acid (DBSA) dopant. Thermogravimetric analysis showed that the content of LiMn2O4 in the composite increased with increasing the amount of manganese oxide powder. The battery performance of PPy/LiMn2O4 composite cathodes initially charged was compared with the physical mixture of both materials. Li/(PPy/LiMn2O4) ion cell with EC/DMC/1M LiPF6 electrolyte showed that cycle performance was enhanced by the redox reactivity of PPy as well as the enhanced conductivity of composite electrode. The reversibility of Li cation was proven by electrochemical voltage spectroscopy (EVS).