title: Self-assembled Fe3O4 nanoparticle clusters as high-performance anodes for lithium ion batteries via geometric confinement.
abstract: Although different kinds of metal oxide nanoparticles continue to be proposed as anode materials for lithium ion batteries (LIBs), their cycle life and power density are still not suitable for commercial applications. Metal oxide nanoparticles have a large storage capacity, but they suffer from the excessive generation of solid-electrolyte interphase (SEI) on the surface, low electrical conductivity, and mechanical degradation and pulverization resulted from severe volume expansion during cycling. Herein we present the preparation of mesoporous iron oxide nanoparticle clusters (MIONCs) by a bottom-up self-assembly approach and demonstrate that they exhibit excellent cyclic stability and rate capability derived from their three-dimensional mesoporous nanostructure. By controlling the geometric configuration, we can achieve stable interfaces between the electrolyte and active materials, resulting in SEI formation confined on the outer surface of the MIONCs.
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS) , Seoul 151-742, Republic of Korea.
authors.forename: Soo Hong
authors.initials: SH
authors.lastname: Lee
authors.forename: Seung-Ho
authors.initials: SH
authors.lastname: Yu
authors.forename: Ji Eun
authors.initials: JE
authors.lastname: Lee
authors.forename: Aihua
authors.initials: A
authors.lastname: Jin
authors.forename: Dong Jun
authors.initials: DJ
authors.lastname: Lee
authors.forename: Nohyun
authors.initials: N
authors.lastname: Lee
authors.forename: Hyungyung
authors.initials: H
authors.lastname: Jo
authors.forename: Kwangsoo
authors.initials: K
authors.lastname: Shin
authors.forename: Tae-Young
authors.initials: TY
authors.lastname: Ahn
authors.forename: Young-Woon
authors.initials: YW
authors.lastname: Kim
authors.forename: Heeman
authors.initials: H
authors.lastname: Choe
authors.forename: Yung-Eun
authors.initials: YE
authors.lastname: Sung
authors.forename: Taeghwan
authors.initials: T
authors.lastname: Hyeon