Abstract
SnS2 nanosheets/reduced graphene oxide (rGO) composite was prepared by reflux condensation and hydrothermal methods. In this composite, SnS2 nanosheets in-situ grew on the surface of rGO nanosheets. The SnS2/rGO composite as anode material was investigated both in lithium ion battery (LIB) and sodium ion battery (SIB) systems. The capacity of SnS2/rGO electrode in LIB achieved 514 mAh g−1 at 1.2 A g−1 after 300 cycles. Moreover, the SnS2/rGO electrode in SIB delivered a discharge capacity of 645 mAh g−1 at 0.05 A g−1; after 100 cycles at 0.25 A g−1, the capacity retention still keep 81.2% relative to the capacity of the 6th cycle. Due to the introduction of rGO in the composite, the charge-transfer resistance became much smaller. Compared with SnS2/C electrode, SnS2/rGO electrode had higher discharge capacity and much better cycling performance.
Highlights
Lithium ion batteries (LIBs) are being widely used in the electric vehicles and energy storage fields (Wu et al, 2017; Chen et al, 2018b,c; Cui et al, 2018; Zhang et al, 2018; Zheng et al, 2018)
SnS2/rGO composite was prepared by reflux condensation and hydrothermal methods
It means that there is no impurity in SnS2 sample and Graphene oxide (GO) was reduced to rGO through heat treatment
Summary
Lithium ion batteries (LIBs) are being widely used in the electric vehicles and energy storage fields (Wu et al, 2017; Chen et al, 2018b,c; Cui et al, 2018; Zhang et al, 2018; Zheng et al, 2018). The SnS2/rGO electrode exhibited outstanding lithium and sodium storage properties and cycling performance. The peaks appeared at around 0.5 V are mainly related to the dealloying of LixSn. Figures 5B,C show the typical charge and discharge profiles of SnS2/rGO and SnS2/C electrodes at 600 mA g−1, respectively.
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