title: Bulk-nanoporous-silicon negative electrode with extremely high cyclability for lithium-ion batteries prepared using a top-down process.
abstract: We synthesized freestanding bulk three-dimensional nanoporous Si using dealloying in a metallic melt, a top-down process. Using this nanoporous Si, we fabricated negative electrodes with high lithium capacity, nearing their theoretical limits, and greatly extended cycle lifetimes, considerably improving the battery performance compared with those using electrodes made from silicon nanoparticles. By operating the electrodes below the accommodation volume limit of their pores, we prolonged their cycle lifetime.
authors.affiliation: Institute for Materials Research, Tohoku University , Sendai, Miyagi 980-8577, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Wada
authors.forename: Tetsu
authors.initials: T
authors.lastname: Ichitsubo
authors.forename: Kunio
authors.initials: K
authors.lastname: Yubuta
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Segawa
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Yoshida
authors.forename: Hidemi
authors.initials: H
authors.lastname: Kato