Journal
NANO RESEARCH
Volume 6, Issue 1, Pages 55-64Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-012-0281-7
Keywords
tin sulfide; nanobelts; Li-ion battery; morphology preservation
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Funding
- State Key Project of Fundamental Research for Nanoscience and Nanotechnology [2011CB932401, 2011CBA00500]
- National Natural Science Foundation of China [20921001, 21051001]
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[020]-oriented tin sulfide nanobelts with a length/thickness ratio of 100 have been synthesized by a facile hydrothermal method without any surfactants, and the nanobelts have shown good strain-accommodating properties as well as good electrochemical performance as the anode for Li-ion batteries. The formation of the nanobelts results from a precipitation-dissolution-transformation mechanism, and the [020] oriented growth can be ascribed to the {010} facet family having the lowest atomic density. In particular, SnS shows clear Li-Sn alloying/de-alloying reversible reactions in the potential range 0.1-1.0 V. Based on galvanostatic measurements and electrochemical impedance spectroscopy, SnS nanobelts have shown impressive rate performance. The post-cycled SnS nanobelts were completely transformed into metallic tin, and preserved the one-dimensional structure due to their flexibility which accommodates the large volumetric expansion.
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