Zeolitic Imidazolate Framework 67-Derived Ce-Doped CoP@N-Doped Carbon Hollow Polyhedron as High-Performance Anodes for Lithium-Ion Batteries

Zeolitic Imidazolate Framework 67 (ZIF-67) and its derivates have attracted extensive interest for lithium-ion batteries (LIBs). Here, Cerium-doped cobalt phosphide@nitrogen-doped carbon (Ce-doped CoP@NC) with hollow polyhedron structure materials were successfully synthesized via ionic-exchange wit...

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Bibliographic Details
Published in:Crystals (Basel) 2022-04, Vol.12 (4), p.533
Main Authors: Zhai, Yanjun, Zhou, Shuli, Guo, Linlin, Xin, Xiaole, Zeng, Suyuan, Qu, Konggang, Wang, Nana, Zhang, Xianxi
Format: Article
Language:English
Subjects:
anode
Anodes
Carbon
Ce-doped CoP
Cerium
Charge transfer
Composite materials
Electrodes
Energy storage
hollow polyhedron
Ion diffusion
Lithium-ion batteries
Low temperature
Metal-organic frameworks
Morphology
N-doped carbon
Nanoparticles
Nanostructured materials
Nitrogen
Phosphating (coating)
Phosphides
Polyhedra
Rare earth elements
Rechargeable batteries
Scanning electron microscopy
Spectrum analysis
Transition metals
Transmission electron microscopy
Zeolites
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Summary:Zeolitic Imidazolate Framework 67 (ZIF-67) and its derivates have attracted extensive interest for lithium-ion batteries (LIBs). Here, Cerium-doped cobalt phosphide@nitrogen-doped carbon (Ce-doped CoP@NC) with hollow polyhedron structure materials were successfully synthesized via ionic-exchange with Co and Ce ions using the ZIF-67 as a template followed with a facile low-temperature phosphorization treatment. Benefitting from the well-designed hollow polyhedron, steady carbon network, and Ce-doping structural merits, the as-synthesized Ce-doped CoP@NC electrode demonstrated superior performance as the anode in LIBs: a superior cyclability (400 mA h g−1 after 500 cycles) and outstanding rate-capability (590 mA h g−1, reverted to 100 mA g−1). These features not only produced more lithium-active sites for LIBs anode and a shorter Li-ion diffusion pathway to expedite the charge transfer, but also the better tolerance against volume variation of CoP during the repeated lithiation/delithiation process and greater electronic conductivity properties. These results provide a methodology for the design of well-organized ZIFs and rare earth element-doped transition metal phosphate with a hollow polyhedron structure.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst12040533