Co3-xMnxO4 as a High Capacity Anode Material for Lithium Ion Batteries

Abstract

In the recent years, nanostructured metal oxides have attracted a great interest as a promising anode materials for lithium-ion batteries. Co2.78Mn0.22O4 and Co2.82Mn0.18O4 nanoparticles belonging to Co3-xMnxO4 solid solution, were prepared by a sol-gel synthesis method employing alginate as a gelling agent. Characterized by X-Rays Diffraction (XRD) technique, the material crystallizes in the Fd-3m space group with the cubic spinel. As an anode materials for Li-ion batteries, Co2.78Mn0.22O4 exhibits high initial charge and discharge capacities of 723 and 429 mAh g^-1, respectively. A reversible capacity of 418 mAh g^-1 was maintained after 50 cycles at 180 mAg^-1. Compared to Co2.82Mn0.18O4, Co2.78Mn0.22O4 with high Mncontent exhibits better performances.