ID Cu(OH)_2 nanorod/2D SnO_2 nanosheets core/shell structured array: Covering with graphene layer leads to excellent performances on lithium-ion battery

摘要

A facile in-situ growth strategy is employ to achieving the two-dimensional SnO2 nanosheets/one-dimensional Cu(OH)(2) nanorods nanoarchitecture on Cu foil current collector (SnO2/Cu(OH)(2)/Cu foil), follow by modification of a uniform layer of graphene (G). Confine with the graphene layer and unique one-dimensional/two-dimensional the nanoarchitecture, the remarkably enhance electrical conductivity and structural stability of G/SnO2/Cu(OH)(2)/Cu foil leads to a high reversible capacity of 1080.6 mAh g(-1) at a current density of 200 mA g(-1), much better than the samples without graphene (512.6 mAh g(-1)) and Cu(OH)(2) nanorod (117.4 mAh g(-1)). Furthermore, G/SnO2/Cu(OH)(2)/Cu foil electrode shows high rate capacity (600.8 mAh g(-1) at 1 A g(-1)) and excellent cycling stability (1057.1 mAh g(-1) at 200 mA g(-1) even after 500 cycles). This work highlights that increasing surface and interface effects with desirable threedimensional nanoarchitecture can open a new avenue to electrochemical performance improvement in lithium-ion battery for SnO2-base anode. (C) 2018 Elsevier B.V. All rights reserved.