title: Catalyst-free synthesis of Si-SiOx core-shell nanowire anodes for high-rate and high-capacity lithium-ion batteries.
abstract: Si-SiOx core-shell nanowires (NWs) ranging from 10 to 30 nm in diameter are prepared by a simple evaporation of silicon monoxide and control of substrate temperatures without any catalyst. The Si-SiOx NWs grown at 735 and 955 °C are strongly anchored to the Cu current collector by forming copper silicide at the interface between Si and Cu, and subsequently used as anodes in lithium-ion batteries, in which no binder or conducting materials are used. The Si-SiOx NWs anodes show excellent electrochemical performances in terms of capacity retention and rate capability. In particular, the Si-SiOx NW anode grown at 955 °C shows a reversible capacity of ∼1000 mAh g(-1) even at a high-rate of 50 C. This catalyst-free synthetic route of Si-SiOx NWs that are strongly anchored to the Cu current collector opens up an effective process for fabricating other high-capacity anodes in lithium-ion batteries (LIBs).
authors.affiliation: Interdisciplinary School of Green Energy and Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST) , UNIST-gil 50, Ulsan 689-798, Republic of Korea.
authors.forename: Kwan Woo
authors.initials: KW
authors.lastname: Lim
authors.forename: Jung-In
authors.initials: JI
authors.lastname: Lee
authors.forename: Jieun
authors.initials: J
authors.lastname: Yang
authors.forename: Young-Ki
authors.initials: YK
authors.lastname: Kim
authors.forename: Hu Young
authors.initials: HY
authors.lastname: Jeong
authors.forename: Soojin
authors.initials: S
authors.lastname: Park
authors.forename: Hyeon Suk
authors.initials: HS
authors.lastname: Shin