期刊
ADVANCED MATERIALS
卷 34, 期 26, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202200574
关键词
2D materials; delamination; superconductors; transition metal carbo-chalcogenides
类别
资金
- National Science Foundation [DMR-1752997, DMR-2048164]
- Knut and Alice Wallenberg (KAW) Foundation [KAW 2015.0043]
- Linkoping Electron Microscopy Laboratory
- Swedish Foundation for Strategic Research (SSF) [RIF 14-0074, EM16-0004]
- Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO-Mat-LiU) [2009 00971]
- U.S. Department of Energy, Office of Science, Basic Energy Science [DE-SC0014208]
A new family of 2D transition metal carbo-chalcogenides (TMCCs) has been reported. Single sheets were obtained from multilayered Nb2S2C and Ta2S2C. Nb2S2C exhibited superconductivity and delaminated Nb2S2C performed better as an electrode material for Li-ion batteries.
A new family of 2D transition metal carbo-chalcogenides (TMCCs) is reported, which can be considered a combination of two well-known families, TM carbides (MXenes) and TM dichalcogenides (TMDCs), at the atomic level. Single sheets are successfully obtained from multilayered Nb2S2C and Ta2S2C using electrochemical lithiation followed by sonication in water. The parent multilayered TMCCs are synthesized using a simple, scalable solid-state synthesis followed by a topochemical reaction. A superconductivity transition is observed at 7.55 K for Nb2S2C. The delaminated Nb2S2C outperforms both multilayered Nb2S2C and delaminated NbS2 as an electrode material for Li-ion batteries. Ab initio calculations predict the elastic constant of TMCC to be over 50% higher than that of TMDC.
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