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Enhancing the Interaction of Carbon nanotubes by Metal-Organic Decomposition with Improved Mechanical Strength and Ultra-Broadband EMI Shielding Performance

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Nano-Micro Letters 2024年第7期16卷 281-294页

作者： Yu-Ying Shi Si-Yuan Liao Qiao-Feng Wang Xin-Yun Xu Xiao-Yun Wang Xin-Yin Gu You-Gen Hu Peng-Li Zhu Rong Sun Yan-Jun Wan Shenzhen Institute of Advanced Electronic Materials Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China Southern University of Science and Technology Shenzhen 518055People’s Republic of China National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050People’s Republic of China

The remarkable properties of Carbon nanotubes(CNTs)have led to promising applications in the field of electromagnetic inter-ference(EMI)shielding.However,for macroscopic CNT assemblies,such as CNT film,achieving high electrical and mechanical properties remains challenging,which heavily depends on the tube-tube interac-tions of CNTs.Herein,we develop a novel strategy based on metal-organic decomposition(MOD)to fabricate a flexible silver-carbon nanotube(Ag-CNT)film.The Ag particles are introduced in situ into the CNT film through annealing of MOD,leading to enhanced tube-tube interactions.As a result,the electrical conductivity of Ag-CNT film is up to 6.82×10^(5) S m^(-1),and the EMI shielding effectiveness of Ag-CNT film with a thickness of~7.8μm exceeds 66 dB in the ultra-broad frequency range(3-40 GHz).The tensile strength and Young’s modulus of Ag-CNT film increase from 30.09±3.14 to 76.06±6.20 MPa(~253%)and from 1.12±0.33 to 8.90±0.97 GPa(~795%),respectively.Moreover,the Ag-CNT film exhibits excellent near-field shield-ing performance,which can effectively block wireless transmission.This innovative approach provides an effective route to further apply macroscopic CNT assemblies to future portable and wearable electronic devices.

关键词： EMI shielding Mechanical strength Carbon nanotubes Metal-organic decomposition Flexibility

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Inner Co Synergizing Outer Ru Supported on Carbon nanotubes for Efficient pH-Universal Hydrogen Evolution Catalysis

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Nano-Micro Letters 2022年第11期14卷 275-289页

作者： Jian Chen Yuan Ha Ruirui Wang Yanxia Liu Hongbin Xu Bin Shang Renbing Wu Hongge Pan Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an 710021People’s Republic of China School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710126People’s Republic of China Department of Materials Science Fudan UniversityShanghai 200433People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430073People’s Republic of China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027People’s Republic of China

Exploring highly active but inexpensive electrocatalysts for the hydrogen evolution reaction(HER)is of critical importance for hydrogen production from electrochemical water splitting.Herein,we report a multicomponent catalyst with exceptional activity and durability for HER,in which cobalt nanoparticles were in-situ confined inside bamboo-like Carbon nanotubes(CNTs)while ultralow ruthenium loading(~2.6μg per electrode area~cm^(−2))is uniformly deposited on their exterior walls(Co@CNTsǀRu).The atomic-scale structural investigations and theoretical calculations indicate that the confined inner Co and loaded outer Ru would induce charge redistribution and a synergistic electron coupling,not only optimizing the adsorption energy of H intermediates(ΔGH*)but also facilitating the electron/mass transfer.The as-developed Co@CNTsǀRu composite catalyst requires overpotentials of only 10,32,and 63 mV to afford a current density of 10 mA cm^(−2) in alkaline,acidic and neutral media,respectively,representing top-level catalytic activity among all reported HER catalysts.The current work may open a new insight into the rational design of carbon-supported metal catalysts for practical applications.

关键词： Cobalt nanoparticles Carbon nanotubes Ru nanoclusters Hydrogen evolution reaction

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Computational study of transition metal single-atom catalysts supported on nitrogenated Carbon nanotubes for electrocatalytic nitrogen reduction

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Nano Research 2023年第1期16卷 325-333页

作者： Yanyang Qin Yan Li Wenshan Zhao Shenghua Chen Tiantian Wu Yaqiong Su School of Chemistry Xi'an Key Laboratory of Sustainable Energy Materials ChemistryState Key Laboratory of Electrical Insulation and Power EquipmentXi'an Jiaotong UniversityXi'an 710049China Department of Chemistry Tsinghua UniversityBeijing 100084China

Developing efficient and stable catalysts for the electrocatalytic N_(2)reduction reaction(NRR)shows promise in nitrogen fixation.Here,we proposed active and stable single-atom catalysts(SACs)toward NRR,where transition metals are anchored on nitrogenated Carbon nanotubes(NCNTs).Among the screened nine common transition metals(Ti,V,Cr,Mn,Fe,Mo,Ru,Rh,and Ag)on(4,4)NCNTs,we found Mo-NCNT possesses the most excellent NRR catalytic activity and selectivity with a low overpotential of 0.29 V.Then,the NRR performance of Mo-NCNT was further engineered by controlling the nanotube diameter,where the lowest overpotential is 0.18 V at a diameter of 9.6Å.In addition,we found a linear scaling relation between*NNH and*NH_(2)on the studied catalysts with the exception of(2,2)and(3,3)Mo-NCNTs,owing to their extremely unstable structures.We attribute the outstanding NRR performance of Mo-NCNT to the moderate adsorption of N_(2)due to the slightly low d-band center of Mo,and the charge donating and accepting capacity of NCNTs.This work has provided a deeper insight into designing highefficiency and stable NRR SACs supported by NCNTs.

关键词： nitrogen reduction single-atom catalysts density functional theory(DFT) Carbon nanotubes nitrogen doping

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Interactions to plasm protein and application potentials of Carbon nanotubes in blood-contacting medical devices

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Nano Research 2023年第11期16卷 12506-12515页

作者： Jie Meng Xuechun Hu Tao Wen Tao Wang Jian Liu Haiyan Xu Institute of Basic Medical Sciences Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100005China

Carbon nanotubes(CNTs)have been largely investigated in various biomedical fields on the basis of their excellent physical properties and drug delivery performance.However,application capacities of CNTs in blood-contacting medical devices are given due attention though there have been increasingly accumulated experimental data showing promising potentials.Herein,we collected and showed research evidence that strong interactions of CNTs to plasm proteins are attractive and valuable features holding great application potentials for medical devices and implants used in blood-contacting environments,while blood compatibility has been a big challenge faced by this kind of devices.This review introduces the strong and nonspecific plasm protein adsorptions of CNTs due to their high purity of carbon composition and nanostructures,followed by discussions on the implication of these interactions to blood coagulation and complement activation,aiming to sort out and provide insights into the application potentials of CNTs in blood-contacting medical devices and implants in the context of anti-thrombosis and blood purification.

关键词： Carbon nanotubes non-specific adsorption cardiovascular blood purification composites coagulation

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Diameter-dependent photoelectric performances of semiconducting Carbon nanotubes/perovskite heterojunctions

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Nano Research 2023年第11期16卷 12662-12669页

作者： Yayang Yu Wenke Wang Xiao Li Linhai Li Shilong Li Xiaojun Wei Weiya Zhou Jing Lin Yang Huang Huaping Liu School of Materials Science and Engineering Hebei Key Laboratory of Boron Nitride Micro and Nano MaterialsHebei University of TechnologyTianjin 300130China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100049China Beijing Key Laboratory for Advanced Functional Materials and Structure Research Beijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China

The heterojunction of single-wall Carbon nanotubes(SWCNTs)and perovskite quantum dots(QDs)shows excellent photodetection performances due to the combination of the advantages of high carrier mobility of SWCNTs and high absorption coefficient of perovskite QDs.However,the band structure of a SWCNT is determined by its atomic arrangement structure.How the structure of SWCNTs affects the photoelectric performance of the composite film remains elusive.Here,we systematically explored the diameter effect of SWCNTs with different bandgaps on the photodetection performances of SWCNTs/perovskite QDs heterojunction films by integrating semiconducting SWCNTs(s-SWCNTs)with different diameters with CsPbBr3 QDs.The results show that with an increase in diameter of s-SWCNTs,the heterojunction exhibits increasing responsivity(R),detectivity(D*),and faster response time.The great improvement in the optoelectronic performances of devices should be attributed to the higher carrier mobility of larger-diameter SWCNT films and the increasing built-in electric field at the heterojunction interfaces between larger-diameter SWCNTs and CsPbBr3 QDs,which enhances the separation of the photogenerated excitons and the transport of the resulted carriers in SWCNT films.

关键词： Carbon nanotubes perovskite quantum dots diameter effect responsivity detectivity

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Three-dimensional structural Cu^(6)Sn_(5)/Carbon nanotubes alloy thin-film electrodes fabricated by in situ electrodeposition from the leaching solution of waste-printed circuit boards

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International Journal of Minerals,Metallurgy and Materials 2023年第6期30卷 1171-1180页

作者： Shuqing Nie Yu Xin Qiuyun Wang Chengjin Liu Chang Miao Limin Yu Wei Xiao College of Chemistry and Environmental Engineering Yangtze UniversityJingzhou 434023China

Tin-based materials are very attractive anodes because of their high theoretical capacity,but their rapid capacity fading from volume expansions limits their practical applications during alloying and dealloying processes.Herein,the improved binder-free tin-copper intermetallic/Carbon nanotubes(Cu6Sn5/CNTs)alloy thin-film electrodes are directly fabricated through efficient in situ electrodeposition from the leaching solution of treated waste-printed circuit boards(WPCBs).The characterization results show that the easily agglomerated Cu6Sn5 alloy nanoparticles are uniformly dispersed across the three-dimensional network when the CNTs concentration in the electrodeposition solution is maintained at 0.2 g·L−1.Moreover,the optimal Cu6Sn5/CNTs-0.2 alloy thin-film electrode can not only provide a decent discharge specific capacity of 458.35 mAh·g^(−1)after 50 cycles at 100 mA·g^(−1)within capacity retention of 82.58%but also deliver a relatively high reversible specific capacity of 518.24,445.52,418.18,345.33,and 278.05 mAh·g^(−1)at step-increased current density of 0.1,0.2,0.5,1.0,and 2.0 A·g^(−1),respectively.Therefore,the preparation process of the Cu6Sn5/CNTs-0.2 alloy thin-film electrode with improved electrochemical performance may provide a cost-effective strategy for the resource utilization of WPCBs to fabricate anode materials for lithium-ion batteries.

关键词： tin-copper intermetallic in situ electrodeposition Carbon nanotubes anode material lithium-ion battery

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Failure-analysis of Carbon nanotubes and their extreme applications

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Nano Research 2023年第11期16卷 12364-12383页

作者： Mingquan Zhu Yunxiang Bai Runyi Gao Yajing Liu Peng Zhang Hui Zhang Luqi Liu Zhong Zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China

The study of material failure is crucial for the design of engineering applications,as it can have significant social and economic impacts.Carbon nanotubes(CNTs),with their exceptional electrical,mechanical,and thermal properties,hold immense potential for a wide range of cutting-edge applications such as superstrong fiber,lightning strike protector,and even space elevator.This review provides an overview of the advancement in understanding the mechanical and electrical failure study of CNTs and their assemblies,serving as a comprehensive reference for utilizing CNTs in various forms.To begin,we emphasize the importance of studying material failure and provide a brief introduction to CNTs.Subsequently,we explore the mechanical and electrical failure characteristics of CNTs and their assemblies,along with notable examples of applications that utilize their failure-resistant properties,such as flywheel energy storage and lightning strike protection.Lastly,we present perspectives associated with analyzing CNT failure and its implications for extreme applications.

关键词： Carbon nanotubes failure-analysis flywheel energy storage lightning strike protection

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Ingenious Interlacement of CoNiO_(2) on Carbon nanotubes for Highly Stable Lithium‑Ion Batteries

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Acta Metallurgica Sinica(English Letters) 2023年第1期36卷 158-166页

作者： Yu‑Shen Zhao Chang‑Shuo Li Ze‑Chen Lv Peng‑Fei Wang Ting‑Feng Yi School of Materials Science and Engineering Northeastern UniversityShenyang 110819China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China School of Control Engineering Northeastern University at QinhuangdaoQinhuangdao 066004HebeiChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004China

Nickel–cobalt oxide is considered as a promising anode for lithium-ion battery,owing to its high specifc capacity,simple synthesis process and high safety.However,like most transition metal oxide anode materials,nickel–cobalt oxide sufers from poor conductivity,easy agglomeration and large volume expansion in the charging and discharging process,causing an inferior cycling lifespan.Here we report a structure design that CoNiO2 particles are ingeniously interlaced on Carbon nanotubes by a simple solvothermal method.These nanotubes are irregularly intertwined to obtain an independent electrode structure with high electronic conductivity,which can also alleviate the notorious volume expansion.Consequently,the corresponding lithium-ion battery shows superior electrochemical performance.It provides a discharge capacity of 1213.7 mAh g^(−1) at 0.5 A g^(−1),and can be stable over 100 cycles with a capacity retention of 96.45%.Furthermore,the battery can also deliver a reversible capacity of 544.8 mAh g^(−1) at the high current density 3 A g^(−1).This work provides a unique idea for the performance improvement of nickel–cobalt oxide anode for lithium-ion batteries.

关键词： CoNiO2 Carbon nanotubes Solvothermal method Electrochemical performance Lithium-ion battery

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Amplitude-mode spectroscopy of chemically injected and photogenerated charge carriers in semiconducting single-walled Carbon nanotubes

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Nano Research 2023年第4期16卷 5619-5625页

作者： Shai R。Vardeny Alan Phillips Kira A。Thurman ZValy Vardeny Jeffrey L.Blackburn Division of Electrical Electronicand Infocommunications EngineeringOsaka University2-1 Yamada-okaSuitaOsaka 565-0871Japan Materials Chemistryand Computation Science DirectorateNational Renewable Energy LaboratoryGoldenCO 80401USA Department of Physics Colorado School of MinesGoldenCO 80401USA Department of Physics&Astronomy University of UtahSalt Lake CityUT 84112USA

In one-dimensional semiconductors such as conjugated polymers and semiconducting single-walled Carbon nanotubes(s-SWCNTs),injected charge carriers(electrons or holes)can have profound impacts on both electronic conductivity and optical spectra,even at low carrier densities.Understanding charge-related spectral features is a key fundamental challenge with important technological implications.Here,we employ a systematic suite of experimental and theoretical tools to understand the mid-infrared charge signatures of heavily p-type doped polymer-wrapped s-SWCNTs.Across a broad range of nanotube diameters,we find that hole charge carriers induce strong Fano anti-resonances in mid-infrared transmission spectra that correspond to defect-related(D-band)and in-plane tangential(G-band)Raman-active vibrational modes,along with antiresonances arising from infrared(IR)-active polymer and SWCNT modes.We employ^(13)C isotope-labeled s-SWCNTs and a removable wrapping polymer to clarify the relative intensities,energies,and sources of all observed anti-resonances.Simulations performed with the“amplitude mode model”are used to quantitatively reproduce Raman spectra and also help to explain the outsized intensity of the D-band anti-resonance,relative to the G-band,observed for both moderately and degenerately doped s-SWCNTs.The results provide a framework for future studies of ground-and excited-state charge carriers in s-SWCNTs and a variety of low-dimensional materials.

关键词： Carbon nanotubes doping charge carriers phonons electron-phonon coupling

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Current collectors based on multiwalled carbon-nanotubes and fewlayer graphene for enhancing the conversion process in scalable lithium-sulfur battery

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Nano Research 2023年第6期16卷 8433-8447页

作者： Vittorio Marangon Edoardo Barcaro Luca Minnetti Wolfgang Brehm Francesco Bonaccorso Vittorio Pellegrini Jusef Hassoun Graphene Labs Istituto Italiano di TecnologiaGenoa 16163Italy Department of Chemical Pharmaceutical and Agricultural SciencesUniversity of FerraraFerrara 44121Italy BeDimensional S.p.A. Genoa 16163Italy National Interuniversity Consortium of Materials Science and Technology(INSTM) University of Ferrara Research UnitFerrara 44121Italy

We investigated herein the morphological,structural,and electrochemical features of electrodes using a sulfur(S)-super P carbon(SPC)composite(i.e.,S@SPC-73),and including few-layer graphene(FLG),multiwalled Carbon nanotubes(MWCNTs),or a mixture of them within the current collector design.Furthermore,we studied the effect of two different electron-conducting agents,that is,SPC and FLG,used in the slurry for the electrode preparation.The supports have high structural crystallinity,while their morphologies are dependent on the type of material used.Cyclic voltammetry(CV)shows a reversible and stable conversion reaction between Li and S with an activation process upon the first cycle leading to the decrease of cell polarization.This activation process is verified by electrochemical impedance spectroscopy(EIS)with a decrease of the resistance after the first CV scan.Furthermore,CV at increasing scan rates indicates a Li+diffusion coefficient(D)ranging between 10^(−9) and 10^(−7) cm^(2)·s^(−1)in the various states of charge of the cell,and the highest D value for the electrodes using FLG as electron-conducting agent.Galvanostatic tests performed at constant current of C/5(1 C=1675 mA·g_(s)^(−1))show high initial specific capacity values,which decrease during the initial cycles due to a partial loss of the active material,and subsequently increase due to the activation process.All the electrodes show a Coulombic efficiency higher than 97%upon the initial cycles,and a retention strongly dependent on the electrode formulation.Therefore,this study suggests a careful control of the electrode in terms of current collector design and slurry composition to achieve good electrode morphology,mechanical stability,and promising electrochemical performance in practical Li-S cells.

关键词： lithium-sulfur battery current collector few-layer graphene Carbon nanotubes scalability sulfur loading

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