Mesoporous CoFe2O4 octahedra with high-capacity and long-life lithium storage properties

In this work, we present the synthesis of mesoporous CoFe2O4 octahedra via the sol-gel method and their application as anode materials for lithium-ion batteries. The samples are characterized with XRD, SEM, and BET techniques. Based on the combined advantages of porous features, anisotropic octahedral structural stability, and multicomponent effect, CoFe2O4 achieves good electrochemical lithium storage, especially with a high capacity (992 mA h g(-1) at 0.1 A g(-1) after 200 cycles) and ultralong cyclic life (3000 cycles at 5 A g(-1)). Moreover, the structural stability of CoFe2O4 octahedra is probed by decomposing the electrodes after they have been cycled.