Journal of Inorganic Materials ›› 2021, Vol. 36 ›› Issue (7): 773-778.DOI: 10.15541/jim20200529

Special Issue: MXene材料专辑(2020~2021) 【虚拟专辑】层状MAX,MXene及其他二维材料

• RESEARCH LETTER • Previous Articles     Next Articles

Molten Salt Synthesis of Nanolaminated Sc2SnC MAX Phase

LI Youbing1,2(), QIN Yanqing1,2, CHEN Ke1,2, CHEN Lu1,2, ZHANG Xiao1,2, DING Haoming1,2, LI Mian1,2, ZHANG Yiming1,2, DU Shiyu1,2, CHAI Zhifang1,2, HUANG Qing1,2()   

  1. 1. Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
    2. Qianwan Institute of CNiTECH, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
  • Received:2020-09-09 Revised:2020-10-22 Published:2021-07-20 Online:2020-11-05
  • Contact: HUANG Qing, Professor. E-mail:huangqing@nimte.ac.cn
  • About author:LI Youbing(1990-), male, PhD. E-mail:liyoubing@nimte.ac.cn
  • Supported by:
    National Natural Science Foundation(21671195);National Natural Science Foundation(51902320);National Natural Science Foundation(51902319);China Postdoctoral Science Foundation(2020M680082);International Partnership Program of Chinese Academy of Sciences(174433KYSB20190019);Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(2019R01003);Ningbo Top-talent Team Program, Ningbo Municipal Bureau of Science and Technology(2018A610005)

Abstract:

The MAX phases are a family of ternary layered material with both metal and ceramic properties, and it is also precursor materials for synthesis of two-dimensional MXenes. The theory predicts that there are more than 600 kinds of stable ternary layered MAX phase materials. Now, more than 80 kinds of ternary layered MAX phases that the M-site elements are mainly from early transition metal have been experimental synthesized, but few researches are reported on MAX phases where M is a rare earth element. In this study, Sc, Sn and C powders were used as raw materials to synthesize a novel ternary Sc2SnC MAX phase via molten salt method. Phase composition and microstructure of Sc2SnC were confirmed by X-ray diffraction, scanning electron microscope and X-ray energy spectrum analysis. And, structural stability, lattice parameters, mechanical and electronic properties of Sc2SnC were investigated via density functional theory. The theoretical results show that Sc2SnC is thermodynamically stable, and the Sc2SnC is metallic in nature where the contribution from Sc-3d states dominates the electronic conductivity at the Fermi level. This study provides a route to explore more unknown ternary layered rare earth compounds Ren+1SnCn (Re=Sc, Y, La-Nd, n=1) and corresponding rare earth MXenes.

Key words: MAX phases, nanolaminated, scandium, density-functional theory calculation

CLC Number: