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Synthesis of Carbon/Sulfur Nanolaminates by Electrochemical Extraction of Titanium from Ti 2 SC
Author(s) -
Zhao MengQiang,
Sedran Morgane,
Ling Zheng,
Lukatskaya Maria R.,
Mashtalir Olha,
Ghidiu Michael,
Dyatkin Boris,
Tallman Darin J.,
Djenizian Thierry,
Barsoum Michel W.,
Gogotsi Yury
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201500110
Subject(s) - materials science , carbon fibers , electrochemistry , sulfur , graphene , titanium , chemical engineering , covalent bond , extraction (chemistry) , amorphous solid , catalysis , electrode , amorphous carbon , etching (microfabrication) , nanotechnology , metallurgy , chemistry , composite number , organic chemistry , composite material , layer (electronics) , engineering
Herein we electrochemically and selectively extract Ti from the MAX phase Ti 2 SC 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 Ti 3 AlC 2 , Ti 3 SnC 2 , and Ti 2 GeC, 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.