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Assembly of Tin Oxide/Graphene Nanosheets into 3D Hierarchical Frameworks for High‐Performance Lithium Storage
Author(s) -
Huang Yanshan,
Wu Dongqing,
Han Sheng,
Li Shuang,
Xiao Li,
Zhang Fan,
Feng Xinliang
Publication year - 2013
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201300109
Subject(s) - graphene , materials science , lithium (medication) , mesoporous material , tin , tin oxide , nanotechnology , oxide , chemical engineering , hydrothermal circulation , carbon fibers , specific surface area , chemistry , catalysis , composite material , composite number , metallurgy , medicine , biochemistry , endocrinology , engineering
3D hierarchical tin oxide/graphene frameworks (SnO 2 /GFs) were built up by the in situ synthesis of 2D SnO 2 /graphene nanosheets followed by hydrothermal assembly. These SnO 2 /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 SnO 2 nanoparticles, but also facilitated fast ion and electron transport in 3D pathways. As a consequence, the SnO 2 /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 SnO 2 /GFs with excellent cycling stability. Such performance is superior to that of previously reported SnO 2 /graphene and other SnO 2 /carbon composites with similar weight contents of SnO 2 .