期刊
NANOMATERIALS
卷 9, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/nano9091253
关键词
Co3O4 nanoparticles; anthracite-derived graphene; nanocomposite; lithium-ion batteries
类别
资金
- National Natural Science Foundation of China [51974110, U1803114]
- China Postdoctoral Science Foundation [2017M620304]
- Fundamental Research Funds for the Universities of Henan Province [NSFRF180313]
- Education Department Science Foundation of Henan Province [19A440002, 19A530002]
- research fund of Henan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources [KCF201802]
A novel approach is developed to synthesize a nitrogen-doped porous Co3O4/anthracite-derived graphene (Co3O4/AG) nanocomposite through a combined self-assembly and heat treatment process using resource-rich anthracite as a carbonaceous precursor. The nanocomposite contains uniformly distributed Co3O4 nanoparticles with a size smaller than 8 nm on the surface of porous graphene, and exhibits a specific surface area (120 m(2).g(-1)), well-developed mesopores distributed at 3 similar to 10 nm, and a high level of nitrogen doping (5.4 at. %). These unique microstructure features of the nanocomposite can offer extra active sites and efficient pathways during the electrochemical reaction, which are conducive to improvement of the electrochemical performance for the anode material. The Co3O4/AG electrode possesses a high reversible capacity of 845 mAh.g(-1) and an excellent rate capacity of 587 mAh.g(-1). Furthermore, a good cyclic stability of 510 mAh.g(-1) after 100 cycles at 500 mA.g(-1) is maintained. Therefore, this work could provide an economical and effective route for the large-scale application of a Co3O4/AG nanocomposite as an excellent anode material in lithium-ion batteries.
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