Co3O4/carbon composite nanofibrous membrane enabled high-efficiency electromagnetic wave absorption

Abstract

Electromagnetic (EM) wave absorbing materials have been fabricated from diverse materials such as conductive polymers, carbon based nanostructures and magnetic metal oxides. Nevertheless, it has remained a great challenge to develop lightweight and high-efficiency EM wave absorbing materials with a broad frequency range. Herein, we report a scalable strategy to create Co3O4/carbon composite nanofibrous membrane by electrospinning technique followed by stabilization and carbonization processes. An optimal reflection loss (RL) value of 36.27 dB is reached at 13.76 GHz for a layer of 2 mm thickness. RL exceeding −20 dB can be realized in any interval within the 4.5–14.4 GHz range by selecting a proper thickness of the absorbing layer between 1 and 5 mm. The Co3O4/carbon composite nanofibrous membrane could be well served as promising and attractive candidates for lightweight and enhanced EM wave absorbing materials. This presented research provides an innovative and effective approach to design the novel EM wave absorbing material in a broad frequency range for practical applications.

Electromagnetic wave absorbing properties of glucose‐derived carbon‐rich SiOC ceramics annealed at different temperatures

“…[1][2][3] Over the past few decades, microwave absorption materials with the advantage of flexible, lightweight, thermally, thin in thickness, and strong in absorption over a broad absorption frequency range are highly enjoyed for aircraft and electronics. [1][2][3] Over the past few decades, microwave absorption materials with the advantage of flexible, lightweight, thermally, thin in thickness, and strong in absorption over a broad absorption frequency range are highly enjoyed for aircraft and electronics.…”

“…[1][2][3] Over the past few decades, microwave absorption materials with the advantage of flexible, lightweight, thermally, thin in thickness, and strong in absorption over a broad absorption frequency range are highly enjoyed for aircraft and electronics. 1,2,[7][8][9] Of all the critical electromagnetic wave absorption materials, polymer-derived ceramics (PDC), including SiOC, SiBCN, SiCN, and Si 3 N 4 , have captured growing attention due to their controllable microstructure, lightweight, excellent thermomechanical properties, and a wide absorption frequency. 1,2,[7][8][9] Of all the critical electromagnetic wave absorption materials, polymer-derived ceramics (PDC), including SiOC, SiBCN, SiCN, and Si 3 N 4 , have captured growing attention due to their controllable microstructure, lightweight, excellent thermomechanical properties, and a wide absorption frequency.…”

“…In recent years, electromagnetic wave absorption materials have gained enormous attention in environmental disturbance, information security, and human health. [1][2][3] Over the past few decades, microwave absorption materials with the advantage of flexible, lightweight, thermally, thin in thickness, and strong in absorption over a broad absorption frequency range are highly enjoyed for aircraft and electronics. [4][5][6] Therefore, numerous studies have focused on developing the absorbents with special microstructures including porous structure, core-shelled structure and heterostructure, which can greatly enhance electromagnetic wave absorption properties due to interfacial polarization, multiple reflection, and synergistic effects.…”

“…[4][5][6] Therefore, numerous studies have focused on developing the absorbents with special microstructures including porous structure, core-shelled structure and heterostructure, which can greatly enhance electromagnetic wave absorption properties due to interfacial polarization, multiple reflection, and synergistic effects. 1,2,[7][8][9] Of all the critical electromagnetic wave absorption materials, polymer-derived ceramics (PDC), including SiOC, SiBCN, SiCN, and Si 3 N 4 , have captured growing attention due to their controllable microstructure, lightweight, excellent thermomechanical properties, and a wide absorption frequency. [10][11][12][13][14] Various PDC-based electromagnetic wave absorbents have been investigated in recent years.…”

Unprecedented Electromagnetic Interference Shielding from Three-Dimensional Bi-continuous Nanoporous Graphene

“…Many functional nanocomposites are emerging as a new generation of EMI-shielding materials with light weight and high functionality. 1,6,[9][10][11][12][13] Efforts have been put forth to incorporate magnetic nanoparticles, 14,15 nanowires, 16 conductive polymer, 17 and carbon-based materials [18][19][20][21] as conductive fillers into polymer matrices to fabricate lightweight EMI-shielding materials. However, satisfactory shielding performances can only be realized with obvious drawbacks, such as high density, large thickness, poor stability, and high percolation threshold of conductive fillers, being present.…”