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Hierarchical nitrogen-doped carbon spheres (NCSs) prepared by annealing the MnO2-templated spherical polypyrrole (PPy) at 450 or 600 °C were tested as anode materials of Li-ion batteries. The NCSs annealed at 450 °C exhibited higher nitrogen content, more amorphous carbon structure, and lower surface area as compared to the sample annealed at 600 °C. The specific capacities and rate performances of both NCSs samples were much higher than that of commercial mesocarbon microbeads (MCMBs). The NCSs annealed at 600 °C exhibited higher capacity at low current density (−1) but more rapid capacity decay at elevated current rates referring to the sample annealed at 450 °C. The NCSs annealed at higher temperature also possessed inferior cycling stability, possibly due to its lower electronic conductivity and higher degree of graphitization. A high specific capacity of 250.8 mAh g−1 was achieved on the NCSs annealed at 450 °C at 3 A g−1, demonstrating their high potentiality as anode of high power Li-ion batteries. © 2017 Elsevier Ltd
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Electrochimica Acta
ISSN: 0013-4686
Year: 2017
Volume: 245
Page: 279-286
5 . 1 1 6
JCR@2017
5 . 5 0 0
JCR@2023
ESI HC Threshold:226
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
SCOPUS Cited Count: 29
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 3
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