title: Sandwich-Stacked SnO2/Cu Hybrid Nanosheets as Multichannel Anodes for Lithium Ion Batteries.
abstract: We have introduced a facile strategy to fabricate sandwich-stacked SnO2/Cu hybrid nanosheets as multichannel anodes for lithium-ion batteries applying rolled-up nanotechnology with the use of carbon black as intersheet spacer. By employing a direct self-rolling and compressing approach, a much higher effective volume efficiency is achieved as compared to rolled-up hollow tubes. Benefiting from the nanogaps formed between each neighboring sheet, electron transport and ion diffusion are facilitated and SnO2/Cu nanosheet overlapping is prevented. As a result, the sandwich-stacked SnO2/Cu hybrid nanosheets exhibit a high reversible capacity of 764 mAh g(-1) at 100 mA g(-1) and a stable cycling performance of ~75% capacity retention at 200 mA g(-1) after 150 cycles, as well as a superior rate capability of ~470 mAh g(-1) at 1 A g(-1). This synthesis approach presents a promising route to design multichannel anodes for high performance Li-ion batteries.
authors.affiliation: Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstraße 20, Dresden 01069, Germany.
authors.forename: Junwen
authors.initials: J
authors.lastname: Deng
authors.forename: Chenglin
authors.initials: C
authors.lastname: Yan
authors.forename: Lichun
authors.initials: L
authors.lastname: Yang
authors.forename: Stefan
authors.initials: S
authors.lastname: Baunack
authors.forename: Steffen
authors.initials: S
authors.lastname: Oswald
authors.forename: Horst
authors.initials: H
authors.lastname: Wendrock
authors.forename: Yongfeng
authors.initials: Y
authors.lastname: Mei
authors.forename: Oliver G
authors.initials: OG
authors.lastname: Schmidt