Designed synthesis of LiMn2O4 microspheres with adjustable hollow structures for lithium-ion battery applications†
Abstract
Two types of LiMn2O4 microspheres with similar sizes but adjustable hollow structures have been synthesized using a new and simple approach. Their performance as cathode materials for lithium ion battery applications has been studied and correlated with the hollow structural parameters. Through a solid state reaction between LiOH and mesoporous MnO2 obtained by the complete decomposition of MnCO3, LiMn2O4 hollow spheres with a robust wall and small cavity size are prepared (LiMn2O4-A). The fusion of the mesopores and the Kirkendall effect during the lithiation process are responsible for the hollow interior formation. In another approach through partial