title: SnS2 nanoplatelet@graphene nanocomposites as high-capacity anode materials for sodium-ion batteries.
abstract: Na-ion batteries have been attracting intensive investigations as a possible alternative to Li-ion batteries. Herein, we report the synthesis of SnS2 nanoplatelet@graphene nanocomposites by using a morphology-controlled hydrothermal method. The as-prepared SnS2/graphene nanocomposites present a unique two-dimensional platelet-on-sheet nanoarchitecture, which has been identified by scanning and transmission electron microscopy. When applied as the anode material for Na-ion batteries, the SnS2/graphene nanosheets achieved a high reversible specific sodium-ion storage capacity of 725 mA h g(-1), stable cyclability, and an enhanced high-rate capability. The improved electrochemical performance for reversible sodium-ion storage could be ascribed to the synergistic effects of the SnS2 nanoplatelet/graphene nanosheets as an integrated hybrid nanoarchitecture, in which the graphene nanosheets provide electronic conductivity and cushion for the active SnS2 nanoplatelets during Na-ion insertion and extraction processes.
authors.affiliation: Centre for Clean Energy Technology, School of Chemistry and Forensic Science, University of Technology Sydney, Broadway, Sydney, NSW 2007 (Australia), Fax: (+61) 2-9514-1460.
authors.forename: Xiuqiang
authors.initials: X
authors.lastname: Xie
authors.forename: Dawei
authors.initials: D
authors.lastname: Su
authors.forename: Shuangqiang
authors.initials: S
authors.lastname: Chen
authors.forename: Jinqiang
authors.initials: J
authors.lastname: Zhang
authors.forename: Shixue
authors.initials: S
authors.lastname: Dou
authors.forename: Guoxiu
authors.initials: G
authors.lastname: Wang
keywords: anode materials; graphene; nanostructures; sodium ion batteries; tin sulfide