▎ 摘　　要

Iron oxide/graphene hybrids are outstanding electrodes with high specific capacity for secondary batteries. However, in practice there still remains challenges in alleviating the poor electrical conductivity and sig-nificant volume changes of FeOx during the lithiation/delithiation process. Herein, we describe the dis-covery of fabricating graphene-wrapped Fe3O4 (3D-rGO/Fe3O4) via a solution-based self-assembly process. During which, GO/Fe3O4/Na2SO4 precursor was first formed by the corrosion reaction of metallic Fe in GO aqueous solution and antisolvent self-assembly, which was then quenched into water to dissolve the Na2SO4 template and meanwhile enable the GO to shrink and encapsulate the Fe3O4 nanoparticles spon-taneously, followed by a final thermal reduction. Fe3O4 nanoparticles, with a diameter of tens of nan-ometers, are homogeneously enwrapped into rGO framework, guaranteeing the "plane-to-plane" interconnection. The obtained 3D-rGO/Fe3O4 demonstrates unprecedented Li-storage behaviors when uti-lized as Li-ion battery anode. Furthermore, quantitative kinetic analysis revealed that both capacitance and diffusion mechanisms account for Li-storage behavior. This contribution not only presents a ultrahigh -performance Li-storage electrode but also shows a novel methodology to design and construct other gra-ghene-based metallic compounds for various applications.& COPY; 2023 Published by Elsevier B.V.