Metallurgical pyrolysis toward Co@Nitrogen-doped carbon composite for lithium storage

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Elemental state matter-heteroatom-doped carbon composites are of great importance for the development of anode in lithium ion batteries(LIBs).In this article,metal-organic frameworks(MOFs)are adopted as precursor to prepare Co composites via metallurgical pyrolysis under controllable conditions.The obtained nitrogen-doped porous carbon-Co nanocomposite possesses core-shell structure(Co@C-N).Co@C-N exhibits the best Li storage performances as anode active matter.After the 200th cycles at current density of 0.2 Ag-1,a reversible capacity of 870 mAh g-1 is retained.A reversible capacity of 275 mAh g-1 still maintains with 5 Ag-1.Co@C-N presents a high reversible capacity with excellent cycle stability.Considering the corresponding experimental and theoretical results,the Co0-based N-doped porous carbon composite is proposed to work as LIBs anode matter.These results provide a new design idea for electrode matters of metallic ion battery,and demonstrate that MOFs pyrolysis is an effective method for the construction of elemental state anode materials.
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