title: Assembly of tin oxide/graphene nanosheets into 3D hierarchical frameworks for high-performance lithium storage.
abstract: 3D hierarchical tin oxide/graphene frameworks (SnO2 /GFs) were built up by the in situ synthesis of 2D SnO2 /graphene nanosheets followed by hydrothermal assembly. These SnO2 /GFs exhibited a 3D hierarchical porous architecture with mesopores (≈3 nm), macropores (3-6 μm), and a large surface area (244 m(2) g(-1) ), which not only effectively prevented the agglomeration of SnO2 nanoparticles, but also facilitated fast ion and electron transport in 3D pathways. As a consequence, the SnO2 /GFs exhibited a high capacity of 830 mAh g(-1) for up to 70 charge-discharge cycles at 100 mA g(-1) . Even at a high current density of 500 mA g(-1) , a reversible capacity of 621 mAh g(-1) could be maintained for SnO2 /GFs with excellent cycling stability. Such performance is superior to that of previously reported SnO2 /graphene and other SnO2 /carbon composites with similar weight contents of SnO2 .
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P R China.
authors.forename: Yanshan
authors.initials: Y
authors.lastname: Huang
authors.forename: Dongqing
authors.initials: D
authors.lastname: Wu
authors.forename: Sheng
authors.initials: S
authors.lastname: Han
authors.forename: Shuang
authors.initials: S
authors.lastname: Li
authors.forename: Li
authors.initials: L
authors.lastname: Xiao
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
authors.forename: Xinliang
authors.initials: X
authors.lastname: Feng
mesh_terms: D011211:Electric Power Supplies; D004563:Electrochemistry; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D013499:Surface Properties; D017971:Tin Compounds / Q000737:chemistry*
chemical_list: D017971:Tin Compounds; D006108:Graphite; D008094:Lithium; C045358:stannic oxide
keywords: electrochemistry; graphene; mesoporous materials; nanoparticles; tin