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Synthesis of Carbon/Sulfur Nanolaminates by Electrochemical Extraction of Titanium from Ti 2 SC

Abstract : Herein we electrochemically and selectively extract Ti from the MAX phase Ti2SC to form carbon/sulfur (C/S) nanolaminates at room temperature. The products are composed of multi-layers of C/S flakes, with predominantly amorphous and some graphene-like structures. Covalent bonding between C and S is observed in the nanolaminates, which render the latter promising candidates as electrode materials for Li-S batteries. We also show that it is possible to extract Ti from other MAX phases, such as Ti3AlC2, Ti3SnC2, and Ti2GeC, suggesting that electrochemical etching can be a powerful method to selectively extract the M elements from the MAX phases, to produce AX layered structures, that cannot be made otherwise. The latter hold promise for a variety of applications, such as energy storage, catalysis, etc.
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https://hal-amu.archives-ouvertes.fr/hal-01416761
Contributor : Laurence Tortet <>
Submitted on : Wednesday, December 14, 2016 - 6:04:01 PM
Last modification on : Monday, January 29, 2018 - 4:26:02 PM

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Meng-Qiang Zhao, Morgane Sedran, Zheng Ling, Maria R. Lukatskaya, Olha Mashtalir, et al.. Synthesis of Carbon/Sulfur Nanolaminates by Electrochemical Extraction of Titanium from Ti 2 SC. Angewandte Chemie International Edition, Wiley-VCH Verlag, 2015, 54 (16), pp.4810 - 4814. ⟨10.1002/anie.201500110⟩. ⟨hal-01416761⟩

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