J. Mater. Sci. Technol. ›› 2025, Vol. 206: 297-306.DOI: 10.1016/j.jmst.2024.04.044

• Research Article • Previous Articles     Next Articles

Cationic pre-insertion interlayer engineering of manganese dioxide for highly efficient electromagnetic wave absorption

Yue Zhanga, Xin Yanga, Changyi Zhenga, Jiayue Wena, Xingwang Houa, Weiping Yea, Kunyao Caoa, Rui Zhaoa,d,*, Wenjian Wangb,*, Fei Hanc, Weidong Xuea,*   

  1. aSchool of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, PR China;
    bKey Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China;
    bInstitute of Energy Research, Jiangxi Academy of Sciences, Nanchang 330096, PR China;
    dTianfu Jiangxi Laboratory, Chengdu 610041, PR China
  • Received:2024-02-27 Revised:2024-04-19 Accepted:2024-04-19 Published:2025-01-20 Online:2025-01-20
  • Contact: *E-mail addresses: ruizhao@uestc.edu.cn (R. Zhao), wangwenjian@sinap.ac.cn (W. Wang), hanfei2031@163.com , hanfei@jxas.ac.cn (F. Han), xuewd@uestc.edu.cn (W. Xue)

Abstract: Interlayer engineering of two-dimensional structural materials provides unique advantages for tuning the electromagnetic properties of metal oxides, injecting unlimited energy into the design of advanced two-dimensional metal oxide electromagnetic wave absorbers. In this study, Manganese dioxide intercalated with alkali metal ions was prepared by a simple molten salt method. The pre-intercalation of ions not only enhances the polarization loss at the heterogeneous interface between cations (point sites) and manganese dioxide (face sites) but also alters the energy band structure of manganese oxide and enhances its electrical conductivity, which in turn enhances the conductive loss of the manganese dioxide. Due to the synergistic effect of multiple polarizations and conductive losses, NaMO exhibits superb electromagnetic wave absorption properties and an effective absorption bandwidth of 5.36 GHz at thinner matched thicknesses. In addition, the RCS simulation result further verifies the excellent electromagnetic wave absorption capability of NaMO. Under the positive incidence of electromagnetic waves, the electromagnetic wave reflection intensity of the metal plate coated with NaMO is effectively reduced. Finally, this work establishes a new way to modulate the electromagnetic properties.

Key words: Manganese dioxide, Ion intercalation, Molten salt method, Electromagnetic wave absorption