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Issue 4, 2012
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Highly durable SiOC composite anode prepared by electrodeposition for lithium secondary batteries

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Abstract

A highly durable SiOC composite anode was prepared for use in lithium secondary batteries. The SiOC composite was synthesized by electrodeposition of SiCl4. The composite anode delivered a discharge capacity of 1045 mA h per gram of Si at the 2000th cycle and 842 mA h per gram of Si even at the 7200th cycle. The reason for the excellent cyclability was investigated by methods including field emission scanning electron microscopy (FESEM), scanning transmission electron microscopy with an energy dispersive X-ray analyser (STEM-EDX), and X-ray photoelectron spectroscopy (XPS). The results revealed that the excellent cyclability was achieved by the homogeneous dispersion of SiOx and organic/inorganic compounds at the nanometre scale. The structural uniformity of the SiOC composite is believed to have suppressed the crack formation attributable to the stress resulting from the reaction of silicon with lithium during charge–discharge cycles.

Graphical abstract: Highly durable SiOC composite anode prepared by electrodeposition for lithium secondary batteries

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Supplementary files

Article information


Submitted
24 Nov 2011
Accepted
17 Jan 2012
First published
20 Feb 2012

Energy Environ. Sci., 2012,5, 6500-6505
Article type
Paper

Highly durable SiOC composite anode prepared by electrodeposition for lithium secondary batteries

H. Nara, T. Yokoshima, T. Momma and T. Osaka, Energy Environ. Sci., 2012, 5, 6500
DOI: 10.1039/C2EE03278C

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