Increasing Stability of Lithium-Ion Batteries with Ordered Graphene Silicon Negative Electrodes

View/ Open
Date
2013Author
Ahmed, Asif
Babiuch-Hall, Jan
Babu, Taarika
Chen, Gary
Devries, Desiree
Dunford, Karen
Jayatilake, Madara
Li, Emily
Wingate, Scott
Yan, Joseph
Advisor
Wang, Chunseng
Metadata
Show full item recordAbstract
Currently, lackluster battery capability is restricting the widespread integration of Smart
Grids, limiting the long-term feasibility of alternative, green energy conversion
technologies. Silicon nanoparticles have great conductivity for applications in
rechargeable batteries, but have degradation issues due to changes in volume during
lithiation/delithiation cycles. To combat this, we use electrochemical deposition to
uniformly space silicon particles on graphene sheets to create a more stable structure. We
found the process of electrochemical deposition degraded the graphene binding in the
electrode material, severely reducing charge capacity. But, the usage of mechanically
mixing silicon particles with grapheme yielded batteries better than those that are
commercially available.