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Title: Unlocking the potential of SnS2: Transition metal catalyzed utilization of reversible conversion and alloying reactions
Authors: Huang, Zhi Xiang
Wang, Ye
Liu, Bo
Kong, Dezhi
Zhang, Jun
Chen, Tupei
Yang, Hui Ying
Keywords: Catalysis
Issue Date: 2017
Source: Huang, Z. X., Wang, Y., Liu, B., Kong, D., Zhang, J., Chen, T., et al. (2017). Unlocking the potential of SnS2: Transition metal catalyzed utilization of reversible conversion and alloying reactions. Scientific Reports, 7, 41015-.
Series/Report no.: Scientific Reports
Abstract: The alloying-dealloying reactions of SnS2 proceeds with the initial conversion reaction of SnS2 with lithium that produces Li2S. Unfortunately, due to the electrochemical inactivity of Li2S, the conversion reaction of SnS2 is irreversible, which significantly limit its potential applications in lithium-ion batteries. Herein, a systematic understanding of transition metal molybdenum (Mo) as a catalyst in SnS2 anode is presented. It is found that Mo catalyst is able to efficiently promote the reversible conversion of Sn to SnS2. This leads to the utilization of both conversion and alloying reactions in SnS2 that greatly increases lithium storage capability of SnS2. Mo catalyst is introduced in the form of MoS2 grown directly onto self-assembled vertical SnS2 nanosheets that anchors on three-dimensional graphene (3DG) creating a hierarchal nanostructured named as SnS2/MoS2/3DG. The catalytic effect results in a significantly enhanced electrochemical properties of SnS2/MoS2/3DG; a high initial Coulombic efficiency (81.5%) and high discharge capacities of 960.5 and 495.6 mA h g−1 at current densities of 50 and 1000 mA g−1, respectively. Post cycling investigations using ex situ TEM and XPS analysis verifies the successful conversion reaction of SnS2 mediated by Mo. The successful integration of catalyst on alloying type metal sulfide anode creates a new avenue towards high energy density lithium anodes.
ISSN: 2045-2322
DOI: 10.1038/srep41015
Schools: School of Electrical and Electronic Engineering 
Rights: © 2017 The Author(s) (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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