https://scholars.lib.ntu.edu.tw/handle/123456789/492401
Title: | A synergistic “cascade” effect in copper zinc tin sulfide nanowalls for highly stable and efficient lithium ion storage | Authors: | Chiu, J.-M. Chou, T.-C. Wong, D.P. Lin, Y.-R. Shen, C.-A. Hy, S. Hwang, B.-J. Tai, Y. Wu, H.-L. Chen, L.-C. |
Issue Date: | 2018 | Publisher: | Elsevier Ltd | Journal Volume: | 44 | Start page/Pages: | 438-446 | Source: | Nano Energy | Abstract: | Applications of lithium ion battery have been hampered by a lack of ideal anode materials in terms of capacity and stability. The emergence of metal chalcogenide as a candidate material has reinvigorated the search of a low cost and high capacity material system. However, debate about the underlying mechanisms and overall appraisal of its usage in lithium ion battery system remains. Here, a comprehensive study on the energy storage mechanism of copper zinc tin sulfide (CZTS) nanowalls possessing ultrahigh rate capability (500 mAh g−1 charged within 60 s) is reported. Structural evolutions along with the accompanying changes in the oxidation state upon charge/discharge were monitored by ex-situ X-ray diffraction and X-ray photoelectron spectroscopy. During lithiation, lithium ion reacted with CZTS to form lithium sulfides. At the same time, a sequential conversion reactions of copper, zinc and tin sulfides enabled the CZTS nanowalls to achieve excellent electrochemical performance (1400 mAh g−1 at a current density of 1000 mA g−1 over 400 cycles). Multi-element metal chalcogenides in conjunction with an adhesion-enhancing seed layer and a rational nanostructure design hold the key to such ultrahigh capacity and stable anode materials for next generation energy storage devices. © 2017 Elsevier Ltd |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/492401 | ISSN: | 22112855 | DOI: | 10.1016/j.nanoen.2017.12.020 | SDG/Keyword: | Anodes; Chalcogenides; Copper; Electric batteries; Electrodes; Energy storage; Inorganic compounds; Ions; Lithium; Nanostructures; Secondary batteries; Storage (materials); Sulfur compounds; Tin; X ray diffraction; X ray photoelectron spectroscopy; Zinc; Zinc sulfide; Cascade effects; Conversion reactions; Copper zinc tin sulfides; Electrochemical performance; High rate capability; High-capacity materials; Lithium ion storages; Structural evolution; Lithium-ion batteries |
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