Kim D.Y.,Korea Research Institute of Chemical Research |
Suk J.,Korea Research Institute of Chemical Research |
Kim D.W.,Korea Research Institute of Chemical Research |
Kang Y.,Korea Research Institute of Chemical Research |
And 3 more authors.
Journal of Materials Chemistry A | Year: 2014
We report a facile method for the fabrication of a three-dimensional (3D) porous silicon@nickel (Si@Ni) inverse opal structure for Li ion batteries by using an electrodeposition method and a colloidal crystal as a sacrificial template. The Ni inverse opal structure was fabricated first by electrodeposition of Ni on the pre-formed colloidal crystal template, followed by removal of the template. Finally, the Si@Ni inverse opal structure was obtained by electrodeposition of Si onto the Ni inverse opal structure. The highly porous structure of the electrode containing a conductive and mechanically strong Ni scaffold could sufficiently accommodate volume expansion during the Si-Li alloying. A coin cell using the Si@Ni inverse opal structure as an anode exhibited a high charge capacity of 2548.5 mA h g-1, stable cycling retention, and high rate performance without the need for binders or conducting additives. This journal is © the Partner Organisations 2014.