Abstract
Metal-organic frameworks (MOFs) are very promising self-sacrificing templates to develop the large-scale fabrication of new functional materials for energy conversion and storage. In this study, novel multidoped porous mixed metal oxides Cu0.39Zn0.14Co2.47O4-ZnO nanoparticles were successfully fabricated through one-step pyrolysis of a polymetallic zeolitic imidazolate framework attached on reduced graphene oxide (RGO) and copper foam. The obtained Cu0.39Zn0.14Co2.47O4-ZnO/RGO/Cu composites can be directly used as binder-free anode material for lithium-ion battery for the first time, exhibiting a high reversible capacity of 1762 mAh g−1 at a current density of 0.1 A g−1 after 500 cycles with outstanding cycling stability. Such an impressive performance should benefit from the synergistic interaction of multicomponent metal oxides, highly conductive networks (RGO and Cu foam) for fast charge transport, abundant stress buffer hollow interior, and high-level carbon/nitrogen doping in the obtained electrode.
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