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Nano Research 2024年第3期17卷 1655-1665页

作者： Yuhang Zhu Tingting Liu Lin Li maosheng cao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics&Electron EngineeringHarbin Normal UniversityHarbin 150025China

Currently,as the electromagnetic(EM)environment becomes increasingly complex,single-function EM materials can hardly resist the increasing electromagnetic interference(EMI),and there is an urgent need to develop multifunctional EM materials.In this work,multifunctional WSe_(2)/Co_(3)C was prepared by simple hydrothermal methods.Its dielectric performance and EM response were investigated.Efficient absorption,shielding performance,and energy conversion devices were customized.By tailoring the loading content,WSe_(2)/Co_(3)C can switch between EM absorption and EMI shielding.The maximum shielding effectiveness(SE)of WSe_(2)/Co_(3)C reached 36 dB,and high reflection loss(RL)of-60.28 dB and wide effective absorption bandwidth(EAB)of 6.16 GHz can be obtained at low thickness.The multiple EM attenuation mechanisms brought by the combination of two-dimensional(2D)WSe_(2) and magnetic Co_(3)C are considered to be the main reason for the enhanced EM attenuation ability.The WSe_(2)/Co_(3)C composite provides a viable candidate for developing multifunctional EM materials in 2–18 GHz.

关键词： WSe_(2) Co_(3)C electromagnetic property microwave absorption electromagnetic interference shielding energy conversion

Confinedly implanting Fe_(3)O_(4) nanoclusters on MoS_(2) nanosheets to tailor electromagnetic properties for excellent multi-bands microwave absorption

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Journal of Materiomics 2022年第3期8卷 577-585页

作者： Meng Ma Qi Zheng Yuhang Zhu Lin Li maosheng cao Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics&Electronic EngineeringHarbin Normal UniversityHarbin150025China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China

High efficiency microwave absorption(MA)materials with tunable electromagnetic(EM)features have been highly sought.However,it is still a challenge to achieve multi-bands absorption performance by simple optimizing the chemical composition of MA materials.Herein,a simple solvothermal method was used to embed magnetic Fe_(3)O_(4) nanodusters on MoS2 nanosheets,in which magnetic nanodusters weme quantitatively customized More importantly,the MA frequency and MA properties of the material are highly tailored,and multi-bands absorption is achieved.The minimum reflection loss(RL)of Fe_(3)O_(4)/MoS_(2) composite reaches-87.24 dB and is about 4 times more than pure MoS_(2) nanosheets.The effective ab-sorption bandwidth reaches 5.52 GHz(≤-10 dB).These desirable properties result from the introduction of appropriate magnetic Fe_(3)O_(4) nanoclusters,which provide optimal synegistic effect of dielectric and magnetic losses.This result provides a feasible idea for designing high efficiency MA materials with tunable EM features in the future.

关键词： MoS2 nanosheet Fe_(3)O_(4)nanocluster Electromagnetic properties Microwave absorption

Regulating bifunctional flower-like NiFe_(2)O_(4)/graphene for green EMI shielding and lithium ion storage

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Journal of Materials Science & Technology 2022年第32期127卷 48-60页

作者： Lihua Yao Wenqiang cao Jianguo Zhao Qi Zheng Yuchang Wang Shang Jiang Qiliang Pan Jie Song Youqi Zhu maosheng cao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China School of Mechatronical Engineering Shanxi Datong UniversityDatong 037003China Institute of Carbon Materials Science Shanxi Datong UniversityDatong 037009China

Environment and energy are the eternal hot topics in the world,multiloculated microscale materials have attracted great attention in the field of electromagnetic interference(EMI)shielding and lithium ions storage.Herein,a novel flower-like NiFe_(2)O_(4)/graphene composite with adjustable structure was fabricated as EMI shielding material and anode material of lithium-ion batteries.NiFe_(2)O_(4)/graphene composite is a potential green EMI shielding material.The EMI shielding effectiveness(SE)increases with the increase of graphene content in NiFe_(2)O_(4)/graphene composite,and the total EMI SE of NiFe_(2)O_(4)/graphene with 73.6 wt.%graphene increases from 26.5 to 40.6 d B with the increase of frequency in 2–18 GHz.Furthermore,it exhibits long-life and large capacity lithium storage performance at high current density.The capacity reaches 732.79 m Ah g^(-1)after 100 cycles at 0.1 A g^(-1),recovering to more than 139%from the minimum capacity value.After 300 cycles at 0.5 A g^(-1),the capacity increases to 688.5 mAh g^(-1).The initial capacities at 2 and 5 A g^(-1)are 704.9 and 717.8 mAh g^(-1),and remain 297.9 and 203.2 m Ah g^(-1)after 1000 cycles.The distinguished EMI shielding performance and electrochemical performance are mainly ascribed to the structure regulation of NiFe_(2)O_(4)/graphene composite,as well as the synergistic effect of graphene and NiFe_(2)O_(4).This research opens up infinite opportunities for the application of multifunctional and interdisciplinary materials.

关键词： NiFe_(2)O_(4) Graphene EMI shielding Anode Lithium-ion batteries

High-performance microwave absorption enabled by Co_(3)O_(4) modified VB-group laminated VS_(2) with frequency modulation from S-band to Ku-band

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Journal of Materials Science & Technology 2022年第12期107卷 155-164页

作者： Zehao Huang Junye Cheng Huibin Zhang Yingfei Xiong Zhanxin Zhou Qingbin Zheng Guangping Zheng Deqing Zhang maosheng cao School of Materials Science and Engineering Qiqihar UniversityQiqihar 161006China Department of Materials Science and Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China

High performance microwave absorption(MA)materials especially those with tunable frequency are highly desirable for telecommunication industries and military camouflage in the information era.Herein,we constructed hierarchical heterostructures based on VB-group laminated vanadium disulfide(VS_(2))nanosheets embedded with cobalt tetroxide(Co_(3)O_(4))nanoparticles.The highly dispersed Co_(3)O_(4)nanoparticles generate strong electromagnetic coupling networks that could enhance the loss properties of MA materials.Moreover,the interconnected VS_(2)layered network results in dipolar/interfacial polarization,multiple reflection and scattering favorable for the enhanced MA performance.Impressively,the maximum reflection loss of the VS_(2)/Co_(3)O_(4)hybrids containing 10%Co_(3)O_(4)can reach 57.96 dB at a thin thickness of 1.57 mm,and the bandwidth with an RL value less than-10 dB is as large as 3.5 GHz.The effective MA band could be adjusted in a range of 15.1 GHz(2.9-18 GHz)from S to Ku bands by the increase in thickness from 1.2 mm to 5.5 mm.The results show that the synergistic effect of multiple loss mechanisms and good impedance matching could be the reasons for strong MA capability in nearly all frequency bands,and thus,the high-performance and lightweight MA materials could be developed by the VS_(2)/Co_(3)O_(4)hybrids.

关键词： VS2 nanosheets Co_(3)O_(4)nanospheres Hetero-structure Microwave wave absorption

Building the conformal protection of VB-group VS_(2)laminated heterostructure based on biomass-derived carbon for excellent broadband electromagnetic waves absorption

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Journal of Materiomics 2023年第3期9卷 492-501页

作者： Honghan Wang Huibin Zhang Junye Cheng Tingting Liu Deqing Zhang Guangping Zheng Shangru Zhai maosheng cao School of Materials Science and Engineering Qiqihar UniversityQiqihar161006China Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefineryCollege of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian116034China Department of Materials Science Shenzhen MSU-BIT UniversityShenzhenGuangdong Province517182China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Although VB-Group transition metal disulfides(TMDs)VS_(2)nanomaterials with specific electronic properties and multiphase microstructures have shown fascinating potential in the field of electro-magnetic wave(EMW)absorption,the efficient utilization of VS_(2)is limited by the technical bottleneck of its narrow effective absorption bandwidth(EAB)which is attributed to environmental instability and a deficient electromagnetic(EM)loss mechanism.In order to fully exploit the maximal utilization values of VS_(2)nanomaterials for EMW absorption through mitigating the chemical instability and optimizing the EM parameters,biomass-based glucose derived carbon(GDC)like sugar-coating has been decorated on the surface of stacked VS_(2)nanosheets via a facile hydrothermal method,followed by high-temperature carbonization.As a result,the modulation of doping amount of glucose injection solution(Glucose)could effectively manipulate the encapsulation degree of GDC coating on VS_(2)nanosheets,further imple-menting the EM response mechanisms of the VS_(2)/GDC hybrids(coupling effect of conductive loss,interfacial polarization,relaxation,dipole polarization,defect engineering and multiple reflections and absorptions)through regulating the conductivity and constructing multi-interface heterostructures,as reflected by the enhanced EMW absorption performance to a great extent.The minimum reflection loss(Rmin)of VS_(2)/GDC hybrids could reach52.8 dB with a thickness of 2.7 mm at 12.2 GHz.Surprisingly,compared with pristine VS_(2),the EAB of the VS_(2)/GDC hybrids increased from 2.0 to 5.7 GHz,while their environmental stability was effectively enhanced by virtue of GDC doping.Obviously,this work provides a promising candidate to realize frequency band tunability of EMW absorbers with exceptional perfor-mance and environmental stability.

关键词： VS_(2)/GDC hybrids Multi-interface heterostructures Broadband absorption Environmental stability

Confinedly implanted NiFe2O4-rGO： Cluster tailoring and highly tunable electromagnetic properties for selective-frequency microwave absorption

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Nano Research 2018年第3期11卷 1426-1436页

作者： Yanlan Zhang Xixi Wang maosheng cao School of Material Science and Engineering Beijing Institute of Technology Beijing 100081 China

Lightweight and high-efficiency microwave absorption materials with tunable electromagnetic properties is a highly sought-after goal and a great challenge for researchers. In this work, a simple strategy of confinedly implanting small NiFe204 clusters on reduced graphene oxide is demonstrated, wherein the magnetic clusters are tailored, and more significantly, the electromagnetic properties are highly tuned. The microwave absorption was efficiently optimized yielding a maximum reflection loss of -58 dB and - 12 times broadening of the bandwidth （at -10 dB）. Furthermore, tailoring of the implanted magnetic clusters successfully realized the selective-frequency microwave absorption, and the absorption peak could shift from 4.6 to 16 GHz covering 72% of the measured frequency range. The fascinating performances eventuate from the appropriately tailored clusters, which provide optimal synergistic effects of the dielectric and magnetic loss caused by multi-relaxation, conductance, and resonances. These findings open new avenues for designing microwave absorption materials in future, and the well-tailored NiFe204-rGO can be readily applied as a multi-functional microwave absorption material in various fields ranging from civil and commerce to military and aerospace.

关键词： NiFe2O4 clusters,reduced graphene oxide,confined growth,tunable microwaveabsorption

Engineering flexible and green electromagnetic interference shielding materials with high performance through modulating WS_(2) nanosheets on carbon fibers

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Journal of Materiomics 2022年第2期8卷 327-334页

作者： Huibin Zhang Tingting Liu Zehao Huang Junye Cheng Honghan Wang Deqing Zhang Xuewei Ba Guangping Zheng Ming Yan maosheng cao School of Materials Science and Engineering Qiqihar UniversityQiqihar 161006China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Materials Science and Engineering And Shenzhen Key Laboratory for Additive Manufacturing of High-performance MaterialsSouthern University of Science and TechnologyShenzhen 518055China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China

Flexible and wearable electromagnetic interference(EMI)shielding material is one of the current research focuses in the field of EMI shielding.In this work,for the first time,WS_(2)-carbon fiber(WS_(2)-CF)composites are synthesized by implanting WS_(2),which has a multiphase structure and a large number of defects,onto the surface of carbon fiber(CF)by using a simple one-step hydrothermal method,and are applied to protect electronic devices from EMI.It is found that the EMI shielding performance of WS_(2)-CF is significantly improved,especially for those at Se and C-bands.At 2 GHz,the EMI shielding efficiency could reach 36.0 dB at a typical thickness of 3.00 mm of the composite,which is much better than that of pure CF(25.5 dB).Besides paving a novel avenue to optimize the electromagnetic shielding performance of flexible and wearable CF-based EMI shielding materials,which have great potential in the practical application for EMI shielding,this work provides a new paradigm for the design and synthesis of EMI shielding materials which have a broad application prospect.

关键词： Flexible electromagneic shielding Carbon fibers WS_(2) Conductive networks

Lightweight and High-Performance Microwave Absorber Based on 2D WS2-RGO Heterostructures

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Nano-Micro Letters 2019年第3期11卷 21-35页

作者： Deqing Zhang Tingting Liu Junye Cheng Qi cao Guangping Zheng Shuang Liang Hao Wang maosheng cao School of Materials Science and Engineering Qiqihar UniversityQiqihar161006People’s Republic of China Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen518060People’s Republic of China Department of Chemistry School of ScienceThe University of TokyoTokyo113.8656Japan4Department of Mechanical EngineeringSchool of EngineeringThe University of TokyoTokyo113.8656Japan Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong KongPeople’s Republic of China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081People’s Republic of China

Two-dimensional(2D)nanomaterials are categorized as a new class of microwave absorption(MA)materials owing to their high specific surface area and peculiar electronic properties.In this study,2D WS2-reduced graphene oxide(WS2-rGO)heterostructure nanosheets were synthesized via a facile hydrothermal process;moreover,their dielectric and MA properties were reported for the first time.Remarkably,the maximum reflection loss(RL)of the sample-wax composites containing 40 wt% WS2-rGO was-41.5 dB at a thickness of 2.7 mm;furthermore,the bandwidth where RL<-10 dB can reach up to 13.62 GHz(4.38-18 GHz).Synergistic mechanisms derived from the interfacial dielectric coupling and multiple-interface scattering after hybridization of WS2 with rGO were discussed to explain the drastically enhanced microwave absorption performance.The results indicate these lightweight WS2-rGO nanosheets to be potential materials for practical electromagnetic wave-absorbing applications.

关键词： 2D WS2 nanosheets Reduced graphene oxide Heterostructure Microwave absorption

Hierarchical three-dimensional flower-like Co3O4 archi- tectures with a mesocrystal structure as high capacity anode materials for long-lived lithium-ion batteries

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Nano Research 2018年第3期11卷 1437-1446页

作者： Wenqiang cao Wenzhong Wang Honglong Shi Jun Wang maosheng cao Yujie Liang Min Zhu School of Science Minzu University of China Beijing 100081 China Faculty of Sciences Ningbo University Ningbo 315211 China School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China

In this work, we rationally design a high-capacity electrode based on three- dimensional （3D） hierarchical Co3O4 flower-like architectures with a mesocrystal nanostructure. The specific combination of the micro-sized 3D hierarchical architecture and the mesocrystal structure with a high porosity and single crystal-like nature can address the capacity fading and cycling stability as presented in many conversion electrodes for lithium-ion batteries. The hierarchical 3D flower-like Co3O4 architecture accommodates the volume change and mitigates mechanical stress during the lithiation-delithiation processes, and the mesocrystal structure provides extra lithium-ion storage and electron/ion transport paths. The achieved hierarchical 3D Co3O4 flower-like architectures with a mesocrystal nanostructure exhibit a high reversible capacity of 920 mA.h.g-1 after 800 cycles at 1.12 C （1 C = 890 mA.h.gq）, improved rate performance, and cycling stability. The finding in this work offers a new perspective for designing advanced and long-lived lithium-ion batteries.

关键词： Co3O4,three-dimensional,anode materials,lithium-ion batteries

Coaxial multi-interface hollow Ni-AI203-ZnO nanowires tailored by atomic layer deposition for selective- frequency absorptions

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Nano Research 2017年第5期10卷 1595-1607页

作者： Lili Yan Jia Liu Shichao Zhao Bin Zhang Zhe Gao Huibin Ge Yao Chen maosheng cao Yong Qin State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 China University of Chinese Academy of Sciences Beijing 100039 China School of Material Science and Engineering Beijing Institute of Technology Beijing 100081 China

In this work, atomic layer deposition （ALD） was employed to fabricate coaxial multi-interface hollow Ni-A12OB-ZnO nanowires. The morpholog34 microstructure, and ZnO shell thickness dependent electromagnetic and microwave absorbing properties of these Ni-A12OB-ZnO nanowires were characterized. Excellent microwave absorbing properties with a minimum reflection loss （RL） of approximately -50 dB at 9.44 GHz were found for the Ni-A12OB-100ZnO nanowires, which was 10 times of Ni-A1203 nanowires. The microwave absorption frequency could be effectively varied by simply adjusting the number of ZnO deposition cycles. The absorption peaks of Ni-A1203-100ZnO and Ni-A12OB-150ZnO nanowires shifted of 5.5 and 6.8 GHz towards lower frequencies, respectively, occupying one third of the investigated frequency band. The enhanced microwave absorption arose from multiple loss mechanisms caused by the unique coaxial multi-interface structure, such as multi-interfacial polarization relaxation, natural and exchange resonances, as well as multiple internal reflections and scattering. These results demonstrate that the ALD method can be used to realize tailored nanoscale structures, making it a highly promising method for obtaining high- efficiency microwave absorbers, and opening a potentially novel route for frecluencv adiustment and microwave ima^in~ fields.

关键词： atomic layer deposition（ALD）,Ni-A1203-ZnO nanowires,selective frequencyabsorption