Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 656, Issue -, Pages 278-283Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.09.208
Keywords
CoO/3D graphene; Composite material; Lithium-ion battery; Anode; Electrochemical performance
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Funding
- Foundation of Henan Educational Committee [13A530366]
- Foundation for young teachers of colleges and universities of Henan Province [GGJS-116]
- Foundation for young teachers of Zhengzhou University of Light Industry [2011XGGJS005]
- Henan technology department, China [122300410297]
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A CoO/3D graphene composite synthesized via hydrothermal method was used as an anode material for Li-ion batteries. X-ray diffraction, scanning electron microscopy, thermogravimetry, energy-dispersive Xray spectroscopy, transmission electron microscope, cyclic voltammetry, electrochemical impedance spectroscopy, and charge/discharge measurement were conducted to evaluate the physical and electrochemical properties of the CoO/3D graphene composite. Results showed that the composite delivered high rate capacities of 1481.1, 657.7, 472.5, 423.8, and 391.2 mAh g(-1), at 50, 100, 200, 300, 400, and 500 mA g(-1), respectively. The capacity after 100 cycles was 860 mAh g(-1) at 50 mA g(-1), thereby indicating excellent cycle stability. The excellent electrochemical performance was ascribed to 3D graphene sheets that were formed in the composite structure. (C) 2015 Elsevier B.V. All rights reserved.
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