Synthesis of Carbon/Sulfur Nanolaminates by Electrochemical Extraction of Titanium from Ti2SC

Meng Qiang Zhao, Morgane Sedran, Zheng Ling, Maria R. Lukatskaya, Olha Mashtalir, Michael Ghidiu, Boris Dyatkin, Darin J. Tallman, Thierry Djenizian, Michel W. Barsoum, Yury Gogotsi

Research output: Contribution to journalArticlepeer-review

104 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)4810-4814
Number of pages5
JournalAngewandte Chemie - International Edition
Volume54
Issue number16
DOIs
StatePublished - Apr 13 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • General Chemistry

Keywords

  • C/S nanolaminates
  • MAX phase
  • electrochemical etching
  • layered structures
  • selective extraction

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