One-dimensional Ni@Co/C@PPy composites for superior electromagnetic wave absorption

Yuxin Bi; Mingliang Ma; Zijian Liao; Zhouyu Tong; Yan Chen; Rongzhen Wang; Yong Ma; Guanglei Wu

doi:10.1016/j.jcis.2021.07.050

One-dimensional Ni@Co/C@PPy composites for superior electromagnetic wave absorption

J Colloid Interface Sci. 2022 Jan:605:483-492. doi: 10.1016/j.jcis.2021.07.050. Epub 2021 Jul 16.

Authors

Yuxin Bi¹, Mingliang Ma², Zijian Liao¹, Zhouyu Tong¹, Yan Chen¹, Rongzhen Wang¹, Yong Ma³, Guanglei Wu⁴

Affiliations

¹ School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, People's Republic of China.
² School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, People's Republic of China. Electronic address: mamingliang@qut.edu.cn.
³ School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, People's Republic of China.
⁴ Institute of Materials for Energy and Environment, State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, People's Republic of China.

PMID: 34340035
DOI: 10.1016/j.jcis.2021.07.050

Abstract

The conductive networks for electron hopping and migration constructed by one-dimensional (1D) composite absorbers are highly desirable to improve the electromagnetic (EM) wave attenuation capacity. Herein, the Ni@Co/C@polypyrrole (PPy) composites integrating the advantages of component and microstructure were fabricated. The addition of Co/C and PPy effectively optimized the impedance matching and improved the EM attenuation. Under the comprehensive impacts of multiple reflections/scattering, conduction loss and interface polarization, the Ni@Co/C@PPy composites showed superior EM wave absorption with the reflection loss (RL) value of -48.76 dB and the effective absorption bandwidth (EAB) of 5.10 GHz at a corresponding thickness of 2.0 mm. The largest EAB could reach 5.54 GHz (7.24-12.78 GHz) at the thickness of 2.2 mm. This work provides a great reference for fabricating 1D novel EM wave absorption materials.

Keywords: Electromagnetic wave absorption; Ni nanowires; Ni@Co/C@PPy composites; One-dimensional; Polypyrrole.