Simple fabrication of cobalt-nickel alloy/carbon nanocomposite fibers for tunable microwave absorption

Jinhu Hu; Zhengguo Jiao; Jialin Jiang; Yongbo Hou; Xuewei Su; Jianxin Zhang; Chao Feng; Yong Ma; Mingliang Ma; Jianxiu Liu

doi:10.1016/j.jcis.2023.09.009

Simple fabrication of cobalt-nickel alloy/carbon nanocomposite fibers for tunable microwave absorption

J Colloid Interface Sci. 2023 Dec 15;652(Pt B):1825-1835. doi: 10.1016/j.jcis.2023.09.009. Epub 2023 Sep 2.

Authors

Jinhu Hu¹, Zhengguo Jiao¹, Jialin Jiang¹, Yongbo Hou¹, Xuewei Su¹, Jianxin Zhang¹, Chao Feng¹, Yong Ma², Mingliang Ma³, Jianxiu Liu⁴

Affiliations

¹ School of Civil Engineering, Qingdao University of Technology, Qingdao, 266520, Shandong, China.
² School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, Shandong, China.
³ School of Civil Engineering, Qingdao University of Technology, Qingdao, 266520, Shandong, China. Electronic address: mamingliang@qut.edu.cn.
⁴ School of Civil Engineering, Qingdao University of Technology, Qingdao, 266520, Shandong, China. Electronic address: 892185469@qq.com.

PMID: 37683410
DOI: 10.1016/j.jcis.2023.09.009

Abstract

A series of CoNi/C nanocomposite fibers with different Co and Ni ratios were successfully prepared by electrospinning and carbonization techniques for the study of electromagnetic microwave (EMW) absorbing materials. We systematically studied the influence of Co and Ni content on the microstructure, chemical composition, magnetic properties, and EMW absorption characteristics of the samples. The results showed that CoNi/C nanocomposite fibers obtained excellent EMW absorption ability through the reasonable design of the composition, and the Co/Ni ratio significantly affected the microstructure and EMW absorption performance. When the Co/Ni ratio was 1/3, the minimum reflection loss (RL_min) is -71.2 dB (2.4 mm, 13.4 GHz), and the maximum effective absorption bandwidth (EAB, RL＜-10 dB) is up to 5.9 GHz (2.2 mm, 12.1-18 GHz), covering almost the entire Ku band. This study demonstrated the enormous potential of one-dimensional structure in the field of EMW absorption. In addition, the CoNi/C nanocomposite fiber synthesized using a straightforward and low-cost method not only has excellent EMW absorption performance but also has the potential for practical application. The results of this study provide a simple and effective approach for designing high-performance EMW absorbing materials.

Keywords: CoNi/C nanocomposite fibers; Electromagnetic microwave absorption; Electrospinning; One-dimensional.