Co3O4/LaCoO3 nanocomposites derived from MOFs as anodes for high-performance lithium-ion batteries

Magnetic CoFe2O4 and NiFe2O4 Induced Self-Assembled Graphene Nanoribbon Framework with Excellent Properties for Li-Ion Battery

A magnetically induced self-assembled graphene nanoribbons (GNRs) method is reported to synthesize MFe₂O₄/GNRs (M = Co,Ni). It is found that MFe₂O₄ compounds not only locate on the surface of GNRs but anchor on the interlayers of GNRs in the diameter of less than 5 nm as well. The in situ growth of MFe₂O₄ and magnetic aggregation at the joints of GNRs act as crosslinking agents to solder GNRs to build a nest structure. Additionally, combining GNRs with MFe₂O₄ helps to improve the magnetism of the MFe₂O₄. As an anode material for Li⁺ ion batteries, MFe₂O₄/GNRs can provide high reversible capacity and cyclic stability (1432 mAh g^-1 for CoFe₂O₄/GNRs and 1058 mAh g^-1 for NiFe₂O₄ at 0.1 A g^-1 over 80 cycles).