Polypyrrole Chains Decorated on CoS Spheres: A Core-Shell Like Heterostructure for High-Performance Microwave Absorption

Cobalt sulfide composites have exhibited great potential in terms of microwave absorption, owing to their low price, relatively high capacitance, and excellent electrocatalytic activity. Thus, a novel core-shell like structure comprising cobalt sulfide@polypyrrole (CoS@PPy) composite was synthesized...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2020-01, Vol.10 (1), p.166
Main Authors: Liu, Hui, Cui, Guangzhen, Li, Ling, Zhang, Zhi, Lv, Xuliang, Wang, Xinxin
Format: Article
Language:English
Subjects:
Absorption
Aerogels
Bandwidths
Capacitance
Chemical synthesis
Cobalt
Cobalt sulfide
Composite materials
core-shell structure
cos
Dipoles
Electromagnetic radiation
Ethanol
Fourier transforms
Heterostructures
Impedance matching
Microwave absorption
Permeability
Polarization
Polymerization
Polypyrroles
ppy
Spectrum analysis
Sulfides
Synergistic effect
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Summary:Cobalt sulfide composites have exhibited great potential in terms of microwave absorption, owing to their low price, relatively high capacitance, and excellent electrocatalytic activity. Thus, a novel core-shell like structure comprising cobalt sulfide@polypyrrole (CoS@PPy) composite was synthesized by a facile solvothermal synthesis method and in situ polymerization. When coated by the heterostructure polypyrrole aerogel, CoS@PPy composite exhibited excellent microwave absorption properties with an optimal reflection loss (R ) of -41.8 dB at 6.96 GHz. Furthermore, the absorption bandwidth (R < -10 dB) of 5.4 GHz could be reached at a coating thickness of 2.05 mm, probably attributing to the synergistic effect of good impedance matching, interfacial polarization, dipole polarization, and conductivity loss. Moreover, this work proposed a loss mechanism mode which probably occurred in the CoS@PPy composites. It was demonstrated that the CoS@PPy composite is a promising material in the field of electromagnetic wave absorption.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano10010166