Nitrogen-doped carbon nanofibers with sulfur heteroatoms for improving microwave absorption

Jiang, Yuansheng; Fu, Xueyan; Tian, Rui; Zhang, Wenjin; Du, Huiling; Fu, Chengrui; Zhang, Zidong; Xie, Peitao; Xin, Jiahao; Fan, Runhua

doi:10.1007/s10853-020-04430-y

Cited by 34 publications

(9 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 125 , 126 ] In spite of the advance of single element doping, the influence of multiple elements co‐doping on EM wave absorption is also widely investigated. [ 127 , 128 , 129 , 130 ] Sun et al. fabricated N, S co‐doped reduced graphene oxide (NS‐rGO) and S, B co‐doped rGO (SB‐rGO) as EM wave absorbers.…”

Section: Dielectric Loss Mechanismsmentioning

confidence: 99%

“…[125,126] In spite of the advance of single element doping, the influence of multiple elements co-doping on EM wave absorption is also widely investigated. [127][128][129][130] Sun et al fabricated N, S co-doped reduced graphene oxide (NS-rGO) and S, B co-doped rGO (SB-rGO) as EM wave absorbers. It turned out that charge density distributions are significantly affected by elements doping, which is illuminated in Figure 3e.…”

Section: Defect Induced Polarizationmentioning

confidence: 99%

See 1 more Smart Citation

Dielectric Loss Mechanism in Electromagnetic Wave Absorbing Materials

2022

View full text Add to dashboard Cite

Electromagnetic (EM) wave absorbing materials play an increasingly important role in modern society for their multi-functional in military stealth and incoming 5G smart era. Dielectric loss EM wave absorbers and underlying loss mechanism investigation are of great significance to unveil EM wave attenuation behaviors of materials and guide novel dielectric loss materials design. However, current researches focus more on materials synthesis rather than in-depth mechanism study. Herein, comprehensive views toward dielectric loss mechanisms including interfacial polarization, dipolar polarization, conductive loss, and defect-induced polarization are provided. Particularly, some misunderstandings and ambiguous concepts for each mechanism are highlighted. Besides, in-depth dielectric loss study and novel dielectric loss mechanisms are emphasized. Moreover, new dielectric loss mechanism regulation strategies instead of regular components compositing are summarized to provide inspiring thoughts toward simple and effective EM wave attenuation behavior modulation.

show abstract

Section: Dielectric Loss Mechanismsmentioning

confidence: 99%

Section: Defect Induced Polarizationmentioning

confidence: 99%

Dielectric Loss Mechanism in Electromagnetic Wave Absorbing Materials

2022

View full text Add to dashboard Cite

show abstract

“…sulfur and nitrogen into the carbon material, the nitrogen and sulfur electrons were localized into the carbon framework, and under an external altering electric eld, it is well polarized which provides negative permittivity properties. 51,52 Overall, the introduction of heteroatoms into the carbon framework promotes the conductivity of the materials, i.e. ions can easily pass through the electrical double layer, hence improving the wettability of the electrode material in the electrolyte solution.…”

Section: Electrochemical Analysismentioning

confidence: 99%

A bottom-up fabrication for sulphur (S), nitrogen (N) co-doped two-dimensional microporous carbon nanosheets for high-performance supercapacitors and H₂, CO₂ storage

Panda

Barman

2023

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

“…[10,11] Most reports confirm heteroatom doping, either in situ or ex situ doping, acts on maternal tissue or maternal atoms. [12][13][14][15] However, the deep internal logic of doping models and heteroatom competition mechanism have not been constructed, let alone precisely manipulate heteroatom priority to freely convert the conduction/polarization loss, thus customizing the optimal dielectric coupling.…”

mentioning

confidence: 99%

Catfish Effect Induced by Anion Sequential Doping for Microwave Absorption

Tao

Pei

et al. 2022

Adv Funct Materials

100

View full text Add to dashboard Cite

Heteroatom doping engineering is desirable in tuning crystal structures and electrical properties, which is considered an opportunity to further develop microwave absorption materials. However, the competition mechanism and priority among doped atoms have not been revealed, which are insufficient to guide the most reasonable dielectric coupling model and design highperformance absorbers. In this work, based on in situ N and O, ex situ S is introduced through external thermal driving, leading to fierce competition among anions. Specifically, S atoms replace pyrrole N, drive out lattice O, and create O vacancies, bringing more extensive local charge redistribution and stronger electron interaction, thus activating the defect-induced polarization (3-6 times higher than conduction loss) in the middle/high-frequency region. Therefore, the effective absorption bandwidth (EAB) of 9.03 GHz and the minimum reflection loss (RL min ) of −64.05 dB at a filling rate of 10 wt.% are obtained, which improves the record of carbon absorbers as reported. Through macro-designs, i.e., multi-layer gradient metamaterial, or utilizing other advantages, e.g., cost-effective, stable chemical properties and wideangle absorption, porous carbon may possess a great application prospect in the naval field.

show abstract

Nitrogen-doped carbon nanofibers with sulfur heteroatoms for improving microwave absorption

Cited by 34 publications

References 42 publications

Dielectric Loss Mechanism in Electromagnetic Wave Absorbing Materials

Dielectric Loss Mechanism in Electromagnetic Wave Absorbing Materials

A bottom-up fabrication for sulphur (S), nitrogen (N) co-doped two-dimensional microporous carbon nanosheets for high-performance supercapacitors and H₂, CO₂ storage

Catfish Effect Induced by Anion Sequential Doping for Microwave Absorption

Contact Info

Product

Resources

About

Nitrogen-doped carbon nanofibers with sulfur heteroatoms for improving microwave absorption

Cited by 34 publications

References 42 publications

Dielectric Loss Mechanism in Electromagnetic Wave Absorbing Materials

Dielectric Loss Mechanism in Electromagnetic Wave Absorbing Materials

A bottom-up fabrication for sulphur (S), nitrogen (N) co-doped two-dimensional microporous carbon nanosheets for high-performance supercapacitors and H2, CO2 storage

Catfish Effect Induced by Anion Sequential Doping for Microwave Absorption

Contact Info

Product

Resources

About

A bottom-up fabrication for sulphur (S), nitrogen (N) co-doped two-dimensional microporous carbon nanosheets for high-performance supercapacitors and H₂, CO₂ storage