Flexible cobalt nanoparticles/carbon nanofibers with macroporous structures toward superior electromagnetic wave absorption

Guorui Yang; Bo Wen; Ziyi Zhou; Silan Wang; Hongyang Zhao; Shujiang Ding; Wei Yan

doi:10.1016/j.jcis.2022.12.158

Flexible cobalt nanoparticles/carbon nanofibers with macroporous structures toward superior electromagnetic wave absorption

J Colloid Interface Sci. 2023 Apr 15:636:194-203. doi: 10.1016/j.jcis.2022.12.158. Epub 2022 Dec 31.

Authors

Guorui Yang¹, Bo Wen¹, Ziyi Zhou¹, Silan Wang², Hongyang Zhao¹, Shujiang Ding³, Wei Yan⁴

Affiliations

¹ School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, "Four Joint Subjects One Union" School-Enterprise Joint Research Center for Power Battery Recycling & Circulation Utilization Technology, Xi'an Jiaotong University, Xi'an 710049, China.
² Department of Environmental Science & Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
³ School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, "Four Joint Subjects One Union" School-Enterprise Joint Research Center for Power Battery Recycling & Circulation Utilization Technology, Xi'an Jiaotong University, Xi'an 710049, China. Electronic address: dingsj@mail.xjtu.edu.cn.
⁴ Department of Environmental Science & Engineering, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China. Electronic address: yanwei@xjtu.edu.cn.

PMID: 36630856
DOI: 10.1016/j.jcis.2022.12.158

Abstract

The increasing electromagnetic (EM) pollution that has seriously threatened human health and electronic devices urgently required high-performance absorbents toward attenuating EM wave (EMW). The combination of microstructure modulation and appropriate components regulation has proven to be a feasible strategy for improving the EMW absorption performance of absorbents. In this work, well-designed one-dimensional carbon nanofibers with macroporous structures and uniformly magnetic metal nanoparticles modification were prepared by the hard-template assisted electrospinning method followed by carbonization and template-elimination processes. The strong interfacial polarization loss and multireflection strengthened by the hollow structures and the magnetic loss induced by the introduced cobalt nanoparticles evidently enhanced the impedance matching level of the macroporous carbon nanofibers/cobalt nanoparticles (MCF/Co). As a result, MCF/Co composite offers broad absorption bandwidth (6.24 GHz) and strong electromagnetic wave absorption performance (-40.1 dB) at a thickness of 3.0 mm. This work inspires the rational one-dimensional macroporous carbon nanofibers design for new-generation EMW materials and provides an important research basis for the porous flexible EMW absorption materials.

Keywords: Co nanoparticles; Electromagnetic wave absorption; Interfacial polarization loss; Macroporous structures; Nanofibers.