Study of MOF-derived Double Hemispherical Nano-Co₃O₄/C Composite as Anode Material for Lithium-Ion Batteries

Co3O4 emerges as a promising substitute in the field of anode electrode materials for the next-generation of lithium-ion batteries (LIBs). Nevertheless, challenges such as volumetric effects during cycling and insufficient conductivity have resulted in its subpar cycle stability, which impedes its practical application. In this study, we successfully employed a straightforward method to design and synthesize double hemispherical nano-Co3O4/C composite materials derived from MOF-74(Co). Benefiting from its nano-porous structure combined with carbon materials, the resulting Co3O4/C electrode manifests outstanding electrochemical performance. Specifically, the obtained Co3O4/C electrode exhibits a notably high reversible cycle capacity (1151.9 mAh g(-1) at 0.2 A g(-1)), exemplary rate capability, and outstanding long-cycle performance (maintaining a capacity of 366.2 mAh g(-1) at 1 A g(-1) after 1400 cycles). This research introduces a novel approach for the development of innovative anode materials for LIBs.