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3D Graphene Encapsulated Hollow CoSnO 3 Nanoboxes as a High Initial Coulombic Efficiency and Lithium Storage Capacity Anode
Author(s) -
Huang Jian,
Ma Yating,
Xie Qingshui,
Zheng Hongfei,
Yang Jingren,
Wang Laisen,
Peng DongLiang
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201703513
Subject(s) - graphene , materials science , faraday efficiency , anode , lithium (medication) , oxide , amorphous solid , chemical engineering , current density , nanotechnology , metallurgy , electrode , organic chemistry , chemistry , medicine , physics , engineering , quantum mechanics , endocrinology
3D Graphene sheets encapsulated amorphous hollow CoSnO 3 nanoboxes (H‐CoSnO 3 @reduced graphene oxide [RGO]) are successfully fabricated by first preparing 3D graphene oxides encapsulated solid CoSn(OH) 6 nanocubes, followed by an alkaline etching process and subsequent heating treatment in Ar. The hollow CoSnO 3 nanoboxes with average particle size of 230 nm are uniformly and tightly encapsulated by RGO sheets. As an anode material for Li‐ion batteries, H‐CoSnO 3 @RGO displays high initial Coulombic efficiency of 87.1% and large reversible capacity of 1919 mA h g −1 after 500 cycles at the current density of 500 mA g −1 . Moreover, excellent rate capability (1250, 1188, 1141, 1115, 1086, 952, 736, and 528 mA h g −1 at 100, 200, 300, 400, 500, 1000, 2000, and 5000 mA g −1 , respectively) is acquired. The reasons for excellent lithium storage properties of H‐CoSnO 3 @RGO are discussed in detail.