Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 767, Issue -, Pages 361-367Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.07.094
Keywords
SnS; Li-ion battery; Carbon encapsulation; Nano-micro architecture; High performance
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Funding
- National Natural Science Foundation of China [51772249, 51521061]
- Fundamental Research Funds for the Central Universities [G2017KY0308]
- Hong Kong Scholars Program [XJ2017012]
- National Natural Science Foundation of Shanxi province [2018JM5092]
- Program of Introducing Talents of Discipline to Universities [B08040]
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SnS-based materials show great potential as high-capacity anode candidates of Li-ion batteries owing to their dual-mechanisms of conversion and alloying reactions. However, the practical application is substantially hampered by its poor electrochemical utilization and stability. Herein, we demonstrate three-dimensional SnS/C microflowers prepared by a controllable self-polymerization and carbonization of polydopamine-coated SnS2 precursors. The building nanosheet consists of uniform encapsulation of ultrafine SnS nanoparticles into the conductive carbon framework. Benefiting from the nanoscaled building blocks and the porous three-dimensional architecture, the carbon-encapsulated nano-SnS microflowers show a significant enhancement in the electrochemical reaction kinetics and durability. As a result, the hybrid exhibits a high specific capacity of similar to 1000 mAh g(-1) at 0.1 A g(-1) with a high initial Coulombic efficiency of 84.2%, good rate capability, and stable cyclability. The present work provides a reliable strategy for the rational fabrication of carbon-encapsulated SnS composites for high-performance Li-ion batteries. (C) 2018 Elsevier B.V. All rights reserved.
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