Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 671, Issue -, Pages 60-65Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.02.038
Keywords
NiO/C composites nanoparticles; Anode materials; Lithium-ion batteries
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Funding
- National Natural Science Foundation of China [51574160, 51054003]
- Shandong Province National Natural Science Foundation [ZR2014EEM049]
- Shandong Province High Education Science Technology Program [J09LB59]
- Shandong Province Midlife-Youth Scientists Research Encouraging Foundation [BS2009NJ007]
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Nanostructured NiO/C composite particles with controlled carbon content for lithium-ion battery anode were prepared via a one-pot hydrothermal approach and subsequent calcination in a high purity nitrogen atmosphere. The composites were composed of amorphous carbon and nanocrystalline NiO. The structure of the NiO crystals was determined with X-ray diffraction (XRD) analysis and the content of carbon was calculated from the energy dispersive spectroscopy (EDS) results. Scanning electron microscopy (SEM) images showed a relatively narrow distribution of particle size for both the neat NiO and NiO/C nanoparticles. Electrochemical performance measurements demonstrated that, after 50 cycles, NiO/C nanocomposites maintained a high reversible capacity of 585.9 mAh g(-1), much higher than that of 356.1 mAh g(-1) of the neat NiO nanoparticles without carbon. The NiO/C nanoparticles also exhibited a remarkable discharge capacity, a high charge/discharge rate and an excellent cycle stability. The improvements can be attributed to the even carbon coating on the NiO particles, which significantly enhances the conductivity and improves the structural stability of the electrode. (C) 2016 Elsevier B.V. All rights reserved.
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