Facile synthesis and electrochemical properties of CoMn₂O ₄ anodes for high capacity lithium-ion batteries

Manganese-based oxides have been proven to be promising materials for applications in high voltage and high energy density Li-ion batteries. In this work, by using hydrothermally synthesized β-MnO₂ nanorods as the templates, we prepared single-crystalline CoMn₂O₄ nano/submicrorods with diameters of about 100 nm and lengths up to tens of micrometers. The electrochemical tests showed that the CoMn₂O ₄ products have a reversible capacity of 512 mA h g^-1 at a current density of 200 mA g^-1 with a coulombic efficiency of 98% after 100 cycles. A specific capacity of about 400 mA h g^-1 was obtained even at a current density as high as 1000 mA g^-1, exhibiting a high reversibility and a good capacity retention. This study suggests that CoMn₂O₄ nano/submicrorods are promising anode materials for high performance lithium-ion batteries.