Composite anode material of silicon/graphite/carbon nanotubes for Li-ion batteries

A composite anode material of silicon/graphite/multi-walled carbon nanotubes (MWNTs) for Li-ion batteries was prepared by ball milling. This composite anode material showed a discharge capacity of 2274 mAh/g in the first cycle, and after 20 charge–discharge cycles, a reversible capacity of 584 mAh/g...

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Bibliographic Details
Published in:Electrochimica acta 2006-06, Vol.51 (23), p.4994-5000
Main Authors: Zhang, Y., Zhang, X.G., Zhang, H.L., Zhao, Z.G., Li, F., Liu, C., Cheng, H.M.
Format: Article
Language:English
Subjects:
Anode material
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Li-ion battery
Multi-walled carbon nanotubes (MWNTs)
Natural graphite
Silicon
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Summary:A composite anode material of silicon/graphite/multi-walled carbon nanotubes (MWNTs) for Li-ion batteries was prepared by ball milling. This composite anode material showed a discharge capacity of 2274 mAh/g in the first cycle, and after 20 charge–discharge cycles, a reversible capacity of 584 mAh/g was retained, much higher than 218 mAh/g for silicon/graphite composite. It was observed that silicon particles were homogeneously embedded into the “lamellar structures” of flaked graphite particles, and the silicon/graphite composite particles were further wrapped by a MWNTs network. The improvement in the electrochemical properties of the composite anode material was mainly attributed to the excellent resiliency and good electric conductivity of the MWNTs network.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2006.01.043