Engineering the electronic structure on MXenes via multidimensional component interlayer insertion for enhanced electromagnetic shielding  

作　　者：Mengqiu Huang Lei Wang Biao Zhao Guanyu Chen Renchao Che 

机构地区：[1]Laboratory of Advanced Materials,Shanghai Key Lab of Molecular Catalysis and Innovative Materials,Department of Materials Science,Fudan University,Shanghai 200438,China [2]Joint-Research Center for Computational Materials,Zhejiang Laboratory,Hangzhou 311100,China

出　　处：《Journal of Materials Science & Technology》2023年第7期149-156,共8页材料科学技术（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.52231007,51725101,11727807,52271167,61790581 and 22088101);the Ministry of Science and Technology of China(973 Project,Nos.2021YFA1200600 and 2018YFA0209100);the Shanghai Excellent Academic Leaders Program(19XD1400400);Shanghai Sailing Program(No.21YF1401800);Key Research Project of Zhejiang Lab(No.2021PE0AC02).

摘　　要：MXene-based functional electromagnetic interference(EMI)shielding films are highly desirable for mod-ern integrated electronic and telecommunication systems in aerospace,military,artificial intelligence,and smart and wearable electronics field.In this work,3D freestanding Ti_(3)C_(2)T_(x)/CNTs/Ni film assembled by 1D multi-walled carbon nanotubes(MWCNTs)/Ni and 2D Ti_(3)C_(2)T_(x)MXene sheets was synthesized by a facile vacuum filtration process.By electrostatic incorporation,hexagonal nickel plates embed on the CNTs and then the CNTs/Ni insert into the Ti_(3)C_(2)T_(x)layers to form magnetized Ti_(3)C_(2)T_(x)-based functional film with a compact and laminated structure.Due to the outstanding electron migration capacity in the highly conductive Ti_(3)C_(2)T_(x)sheet and multiple internal reflections from porous and segregated structures,the op-timized Ti_(3)C_(2)T_(x)/CNTs/Ni composite films show excellent EMI shielding effectiveness of 67.4 dB with elec-trical conductivity of 744 S cm^(-1).Surprisingly,a magnetization compensation strategy is built to boost the EMI shielding effectiveness with decreased conductivity.Meanwhile,the visual magnetic coupling phenomenon and charge distribution in the heterogeneous interfaces could be observed in the recon-structed electron holography images.Those encouraging results shed light on novel magnetized MXene-based functional films for high-performance EMI shielding.

关 键 词：Ti_(3)C_(2)T_(x)MXene Magnetic modulation Electromagnetic-interference shielding Nickel flakes Freestanding film 

分 类 号：TB306[一般工业技术—材料科学与工程]