Metal‐Organic‐Framework Derived Core‐Shell N‐Doped Carbon Nanocages Embedded with Cobalt Nanoparticles as High‐Performance Anode Materials for Lithium‐Ion Batteries

To enhance the performance of Li‐ion batteries, hierarchical carbon‐based hollow frameworks embedded with cobalt nanoparticles are prepared by the pyrolysis of core‐shell ZIF‐8@ZIF‐67 polyhedrals prepared via a seed‐mediated growth method. The resultant hollow frameworks are composed of the N‐doped...

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Bibliographic Details
Published in:Advanced functional materials 2020-12, Vol.30 (50), p.n/a
Main Authors: Xu, Haoran, Zhao, Lanling, Liu, Xiaomeng, Huang, Qishun, Wang, Yueqing, Hou, Chuanxin, Hou, Yuyang, Wang, Jun, Dang, Feng, Zhang, Jintao
Format: Article
Language:English
Subjects:
Anodes
Carbon
Cobalt
Construction materials
core–shell structures
density functional theory
Electrical resistivity
Electrochemical analysis
electrochemistry
Electrode materials
Lithium-ion batteries
Li‐ion batteries
Materials science
metal‐organic frameworks
Nanoparticles
Pyrolysis
Stability analysis
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Summary:To enhance the performance of Li‐ion batteries, hierarchical carbon‐based hollow frameworks embedded with cobalt nanoparticles are prepared by the pyrolysis of core‐shell ZIF‐8@ZIF‐67 polyhedrals prepared via a seed‐mediated growth method. The resultant hollow frameworks are composed of the N‐doped carbon as the inner shells and the porous graphitic carbon embedded with cobalt nanoparticles as the outer shells. Benefiting from the unique hollow architecture with large surface area and good electrical conductivity, the electrode materials exhibit good electrochemical performance with improved specific capacities, high‐rate capability, and good cycling stability for Li‐ion batteries. More importantly, the quantitative kinetic analysis reveals the crucial contributions of N doping and the porous structure of graphitic carbon with cobalt nanoparticles for boosting the performance of carbon‐based materials. The rational design of the unique carbon‐based architecture and the understanding of the underlying mechanism for the charge storage process are crucial to construct advanced carbon‐based materials for high‐performance Li‐ion batteries. Constructing core–shell N‐doped carbon nanocages embedded with cobalt nanoparticles remarkably enhances the electrochemical performance of Li‐ion batteries on the basis of the unique structural features.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202006188