Citation: TIAN Ai-Hua, WEI Wei, QU Peng, XIA Qiu-Ping, SHEN Qi. One-Step Synthesis of SnS₂ Nanoflower/Graphene Nanocomposites with Enhanced Lithium Ion Storage Performance[J]. Acta Physico-Chimica Sinica, ;2017, 33(8): 1621-1627. doi: 10.3866/PKU.WHXB201704191 shu

One-Step Synthesis of SnS₂ Nanoflower/Graphene Nanocomposites with Enhanced Lithium Ion Storage Performance

TIAN Ai-Hua ^1,2, ,
WEI Wei ^1,2 ,
QU Peng ^1,2 ,
XIA Qiu-Ping ² ,
SHEN Qi ¹

1.
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China;
2.
Henan Key Laboratory Cultivation Base of Nanobiological Analytical Chemistry, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, Hen Province, P. R. China

Received Date: 17 February 2017
Revised Date: 12 April 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (21575131) and the Key Scientific Research Project of High Schools in Henan Province (16A430025, 17A480009).

SnS₂ is considered as an attractive anode material to substitute commercial graphite anodes of lithium-ion batteries due to its high specific capacity of 645 mAh·g^-1 as well as low cost. Nevertheless, it suffers poor large volume expansion during the lithiation/delithiation processes, leading to the loss of electrical contact and rapid capacity fading. Herein, by using a facile one-step solvothermal method, SnS₂ nanoflower/graphene nanocomposites (SnS₂ NF/GNs) were prepared, where flower-like SnS₂ hierarchical nanostructures consisting of ultrathin nanoplates, are tightly enwrapped in graphene nanosheets. As anode materials for lithium-ion batteries, the SnS₂ NF/GNs electrode exhibit superior electrochemical performance, with a reversible capacity of 523 mAh·g^-1 after 200 charge-discharge cycles. The enhanced Li storage performance was attributed to the synergistic effect of SnS₂ and graphene. The SnS₂ NF can effectively accommodate the volume change and shorten Li⁺ diffusion distance, while graphene nanosheets can further alleviate the volume expansion of SnS₂ and improve the electronic conductivity.
- Lithium-ion battery,
- Anode,
- SnS₂ nanoflower,
- Graphene
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One-Step Synthesis of SnS₂ Nanoflower/Graphene Nanocomposites with Enhanced Lithium Ion Storage Performance