首页|Cl-terminated decoration to modulate the permittivity of MXene for enhanced electromagnetic-absorbing performance

Cl-terminated decoration to modulate the permittivity of MXene for enhanced electromagnetic-absorbing performance

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The explosive growth of communication technology has given rise to a large number of high-quality electromagnetic wave(EMW)absorbing materials,and single-component materials are often difficult to satisfy the demand.In this study,we propose an etching method of molten chlorine salts under vac-uum to prepare Cl-terminated MXene(MX-Cl)which can meet the requirements of"thin,light,wide and strong"and realize the application of single-component absorbing materials.In the X and Ku bands,MX-Cl achieves a strong reflection loss of-42.99 dB and an effective absorption bandwidth of 3.44 GHz with the 1.2 mm matching thickness.The presence of Cl groups restricts the free electron movement of surface-Ti,which controls the conductivity of the MX-Cl and optimizes its permittivity.Dipole polarization induced by Ti-Cl,interfacial polarization between MXene layers and multiple scattering effects inside the layers all significantly increase the dielectric loss of the MX-Cl considerably.This study provides a new approach to investigating the effect of single atoms on the dielectric properties of materials.This work also offers a simple and low-cost process for the preparation of single-component MXene EMW-absorbing materials.

Cl-terminated MXeneConductivity mechanismMulti-polarization effectElectromagnetic wave absorption

Yunfei He、Dongdong Liu、Qiang Su、Bo Zhong、Long Xia、Xiaoxiao Huang

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School of Materials Science and Engineering,Harbin Institute of Technology at Weihai,Weihai 264009,China

School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China

MIIT Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology,Harbin Institute of Technology,Harbin 150001,China

National Natural Science Foundation of ChinaNatural Science Foundation of Shandong ProvinceSupporting Program for Innovation Team of Outstanding Youth in Colleges and Universities of Shandong Province

51872058ZR2022QB1562020KJA005

2024

10.1016/j.jmst.2023.08.055

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.179(12)
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