J. Mater. Sci. Technol. ›› 2022, Vol. 115: 148-155.DOI: 10.1016/j.jmst.2021.11.029

• Research Article • Previous Articles     Next Articles

Broadband high-performance microwave absorption of the single-layer Ti3C2Tx Mxene

Xuejiao Zhoua,b,*(), Junwu Wena, Zhenni Wanga, Xiaohua Mab,*(), Hongjing Wuc,**()   

  1. aSchool of Advanced Materials and Nanotechnology, Xidian University, Xi’an 710071, China
    bState Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China
    cMOE Key Laboratory of Material Physics and Chemistry under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical Universty, Xi’an 710072, China
  • Received:2021-09-20 Revised:2021-11-01 Accepted:2021-11-03 Published:2022-07-10 Online:2022-01-25
  • Contact: Xuejiao Zhou,Xiaohua Ma,Hongjing Wu
  • About author:**E-mail addresses: wuhongjing@nwpu.edu.cn (H. Wu).
    xhma@xidian.edu.cn (X. Ma),
    *State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xi’an 710071, China. E-mail addresses: xjzhou@xidian.edu.cn (X. Zhou),

Abstract:

MXenes, a family of two-dimensional (2D) materials, exhibit peculiar microwave-absorbing behaviors due to their unique chemical composition and structure. Although laminated Ti3C2Tx MXenes with a multi-layer structure have been used for microwave absorption, real 2D MXenes with a single-layer structure have not yet been investigated. Here, the electromagnetic wave response behavior of single-layer Ti3C2Tx MXenes was explored in detail. The permittivity of Ti3C2Tx MXene rises dramatically with an increase in filler loading, and Ti3C2Tx MXene features a distinct dielectric response wherein dipolar polarization and interfacial polarization makes a greater contribution at low filler loading; conductive loss becomes more prominent at high filler loading. Versus laminated Ti3C2Tx MXene, single-layer Ti3C2Tx MXene delivers superior absorbing capability: The RLmin value of SL-Ti3C2Tx-22% reaches -43.5 dB at 6.5 GHz, and a broad EAB of 6.88 GHz can be attained at a thickness of 1.8 mm due to enhanced dipolar polarization, interfacial polarization, and conductive loss. This work is of great significance in guiding the future development of MXene-based absorbers.

Key words: Microwave absorption, Ti3C2Tx Mxene, Single-layer, Conductive loss