Chem. J. Chinese Universities ›› 2019, Vol. 40 ›› Issue (10): 2059.doi: 10.7503/cjcu20190207

• Articles:Inorganic Chemistry • Previous Articles     Next Articles

Preparation of Large-size Single Layer MXene with Low Defect and Electromagnetic Shielding Performance of MXene Film

LÜ Tong1,*(),ZHANG Enshuang1,YUAN Yin2,FAN Zhimin2,MA Xiangyu1,CHENG Zhongjun3,LIU Yuyan2,GONG Yuanxun1,ZHAO Hongjie1   

  1. 1. Aerospace Institute of Advanced Material & Processing Technology, Beijing 100074, China;
    2. Ministry of Industry and Information Technology Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
  • Received:2019-04-08 Online:2019-10-08 Published:2019-09-05
  • Contact: Lü Tong E-mail:lvtong.12@163.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51803203)

Abstract:

MXene is a novel two-dimensional material with good hydrophilic surface and superior metallic conductivity. However, high quality MXene with large area, single layer and low-defect is still difficult to be prepared thus far. In this paper, single layer MXene with large area and low-defect was prepared by in situ HF etching Ti3AlC2. The microstructures of MXene were characterized by scanning electron microscopy(SEM), transmission electron microscopy(TEM), atomic force microscopy(AFM) and so on. The results show that the size of MXene flakes reaches a few microns and the thickness of flakes is only 1.6 nm; no particle oxidation can be found around flakes. The MXene films were prepared by filtering MXene aqueous solution. The MXene films have the characteristics of high conductivity and outstanding toughness. The conductivity of MXene films is as high as 3280 S/cm. By testing the electromagnetic interference shielding performance of MXene films, the electromagnetic interference shielding effectiveness of the material can reach as high as 60.6 dB with 8 μm thickness and the SSE/t value is up to 19531.1 dB·cm 2·g -1. In addition, after analyzing the electromagne-tic shielding mechanism of MXene film, we know that it follows an absorption-dominant electromagnetic interference shielding mechanism.

Key words: Shielding material, MXene, Large size, High performance

CLC Number: 

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