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https://hdl.handle.net/2440/130365
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Type: | Journal article |
Title: | Enhanced sodium-ion battery performance by structural phase transition from two-dimensional hexagonal-SnS₂ to orthorhombic-SnS |
Other Titles: | Enhanced sodium-ion battery performance by structural phase transition from two-dimensional hexagonal-SnS(2) to orthorhombic-SnS |
Author: | Zhou, T. Pang, W.K. Zhang, C. Yang, J. Chen, Z. Liu, H.K. Guo, Z. |
Citation: | ACS Nano, 2014; 8(8):8323-8333 |
Publisher: | American Chemical Society |
Issue Date: | 2014 |
ISSN: | 1936-0851 1936-086X |
Statement of Responsibility: | Tengfei Zhou, Wei Kong Pang, Chaofeng Zhang, Jianping Yang, Zhixin Chen, Hua Kun Liu and Zaiping Guo |
Abstract: | Structural phase transitions can be used to alter the properties of a material without adding any additional elements and are therefore of significant technological value. It was found that the hexagonal-SnS2 phase can be transformed into the orthorhombic-SnS phase after an annealing step in an argon atmosphere, and the thus transformed SnS shows enhanced sodium-ion storage performance over that of the SnS2, which is attributed to its structural advantages. Here, we provide the first report on a SnS@graphene architecture for application as a sodium-ion battery anode, which is built from two-dimensional SnS and graphene nanosheets as complementary building blocks. The as-prepared SnS@graphene hybrid nanostructured composite delivers an excellent specific capacity of 940 mAh g(-1)and impressive rate capability of 492 and 308 mAh g(-1) after 250 cycles at the current densities of 810 and 7290 mA g(-1), respectively. The performance was found to be much better than those of most reported anode materials for Na-ion batteries. On the basis of combined ex situ Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and ex situ X-ray diffraction, the formation mechanism of SnS@graphene and the synergistic Na-storage reactions of SnS in the anode are discussed in detail. The SnS experienced a two-structural-phase transformation mechanism (orthorhombic-SnS to cubic-Sn to orthorhombic-Na3.75Sn), while the SnS2 experienced a three-structural-phase transformation mechanism (hexagonal-SnS2 to tetragonal-Sn to orthorhombic-Na3.75Sn) during the sodiation process. The lesser structural changes of SnS during the conversion are expected to lead to good structural stability and excellent cycling stability in its sodium-ion battery performance. These results demonstrate that the SnS@graphene architecture offers unique characteristics suitable for high-performance energy storage application. |
Keywords: | Sodium-ion battery; NIB; SIB; SnS; SnS2; Sn; graphene; nanosheets; anode |
Rights: | © 2014 American Chemical Society |
DOI: | 10.1021/nn503582c |
Grant ID: | http://purl.org/au-research/grants/arc/DP1094261 |
Published version: | http://dx.doi.org/10.1021/nn503582c |
Appears in Collections: | Aurora harvest 8 Chemistry and Physics publications |
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