Synthesis of Carbon/Sulfur Nanolaminates by Electrochemical Extraction of Titanium from Ti2SC |
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| Authors: | Dr Meng‐Qiang Zhao Morgane Sedran Zheng Ling Maria R Lukatskaya Olha Mashtalir Michael Ghidiu Boris Dyatkin Darin J Tallman Prof Thierry Djenizian Prof Michel W Barsoum Prof Yury Gogotsi |
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| Institution: | 1. A.?J. Drexel Nanomaterials Institute, and Materials Science and Engineering Department, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104 (USA);2. Aix‐Marseille University, MADIREL Laboratory, FR‐13288 Marseille Cedex 9 (France);3. Carbon Research Laboratory, Liaoning Key Lab for Energy Materials and Chemical Engineering, State Key Lab of Fine Chemicals, Dalian University of Technology, Dalian 116024 (China) |
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| 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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| Keywords: | C/S nanolaminates electrochemical etching layered structures MAX phase selective extraction |
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