材料科学
碳纤维
电化学
硫黄
石墨烯
钛
化学工程
共价键
萃取(化学)
无定形固体
催化作用
电极
无定形碳
蚀刻(微加工)
纳米技术
冶金
化学
复合数
有机化学
物理化学
复合材料
工程类
图层(电子)
作者
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
标识
DOI:10.1002/anie.201500110
摘要
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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