Directly Deposited Silicon/Graphene Hybrid Anodes for Li-ion Batteries
Lithium-ion batteries (LIB) are considered as the most essential energy storage systems due to high energy density. However, current graphite anodes severely hinder LIB from further supporting fast-growing electric vehicles markets for low theoretical capacity. Silicon attracts attentions as one of the most promising candidates for next-generation LIB anode materials because of its much higher theoretical capacity. Silicon anodes have not been commercialized because of the challenges caused by extreme volume expansions and following passive problems, including continuous solid electrolyte interface formation, contact loss between active materials and finally, cycle retention decays. In this thesis, we discuss how to overcome these technical issues by engineering Si/graphene hybrid anodes through aircontrolled electrospray, which include three parts: silicon/graphene hybrid additive to LIB anode with Modifications; directly deposited silicon/graphene oxide LIB anode and further study on their size ratio effect and finally Interconductivity from graphene nanoribbon (GNR) in directly deposited silicon/graphene LIB anode.
Joo, Yong L.
M.S., Chemical Engineering
Master of Science
dissertation or thesis