title: FeOx and Si nano-dots as dual Li-storage centers bonded with graphene for high performance lithium ion batteries.
abstract: A novel design based on both FeOx and Si nano-dots bonded with graphene (FeOx·Si@GNS) as dual lithium-storage centers is reported. They show high performance as anode materials for Li-ion batteries with a remarkable reversible capacity of 1160 mA h g(-1) at 0.2 A g(-1), fast charging/discharging rate, and long cycling life (e.g., a capacity retention of 81.7% at 2.0 A g(-1) after 600 cycles). The origin of these high performances comes from the key factors of the high theoretical specific capacity of FeOx and Si, the shorter Li-ion diffusion distance of both nano-dot structures, fast electron conductivity, and the strain relaxation due to volume variations of both nano-dots bonded with graphene nanosheets during cycles.
authors.affiliation: School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, China. panfeng@pkusz.edu.cn.
authors.forename: Jinlong
authors.initials: J
authors.lastname: Yang
authors.forename: Jiaxin
authors.initials: J
authors.lastname: Zheng
authors.forename: Lin
authors.initials: L
authors.lastname: Hu
authors.forename: Rui
authors.initials: R
authors.lastname: Tan
authors.forename: Kai
authors.initials: K
authors.lastname: Wang
authors.forename: Shichun
authors.initials: S
authors.lastname: Mu
authors.forename: Feng
authors.initials: F
authors.lastname: Pan