"Silicon–Carbon Nanotube Coaxial Sponge as Li-Ion Anodes with High Areal Capacity"

Liangbing Hu: Hui Wu, Yifan Gao, Anyuan Cao, Hongbian Li, James McDough, Xing Xie, Min Zhou, Yi Cui; Advanced Energy Materials, 07/15/11.

Additional Authors: Hui Wu, Yifan Gao, Anyuan Cao, Hongbian Li, James McDough, Xing Xie, Min Zhou, Yi Cui

Abstract:

Highly porous, conductive Si-CNT sponge-like structures with a large areal mass loading are demonstrated as effective Li-ion battery anode materials. Nanopore formation and growth in the Si shell has been identified as the primary failure mode of the Si-CNT sponge anode, and the formation of such nanopores can be minimized by tuning the cutoff voltages. In conjunction with experiments, a theoretical analysis was carried out to explain the pore formation mechanism.