Growth of Si nanowires in porous carbon with enhanced cycling stability for Li-ion storage
Tan, Li Ping
Hng, Huey Hoon
Date of Issue2013
School of Materials Science and Engineering
Si nanowires are successfully grown in porous carbon by supercritical fluid-liquid-solid (SFLS) process, which show high specific capacities and charge–discharge cycling stability as anode materials for Li-ion storage. The enhancement capacity and cycling stability of the Si nanowires/porous carbon composite nanostructures is attributed to the porous carbon serving as a highly conductive framework and absorption of volume changes of Si nanowires during the lithiation/delithiation process. At optimized condition, the Si nanowires/porous carbon electrodes maintain reversible capacities of 1678 mAh g-1 for the 100th cycle at a current density of 420 mA g-1, which is much better as compared to that of pure Si nanowires.
Journal of power sources
© 2013 Elsevier B.V. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Power Sources, Elsevier B.V. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: doi:http://dx.doi.org/10.1016/j.jpowsour.2013.11.008.