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Large-scale synthesis of fluorine-free carbonyl iron-organic silicon hydrophobic absorbers with long term corrosion protection property

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Nano Research 2022年第10期15卷 9479-9491页

作者： Wei Tian Jinyao Li Yifan Liu Longjiang Deng Yang Guo Xian Jian National Engineering Researching Centre of Electromagnetic Radiation Control materials Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of EducationState Key Laboratory of Electronic Thin Films and Integrated DevicesSchool of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 611731China The Yangtze Delta Region Institute(Huzhou)&School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaHuzhou 313001China School of materials and energy University of Electronic Science and Technology of ChinaChengdu 611731China School of Electrical and Information Engineering Panzhihua UniversityPanzhihua 617000China

Environmentally-friendly magnetic metallic absorbers with high-performing antioxidant property,thermal stability,and anticorrosion capability have attracted great attention in real-world applications.A surface modification technology of magnetic metallic absorbers with dense and inert materials has been an effective strategy to solve the aforesaid ***,fluorinefree core–shell carbonyl iron-organic silicon absorbers(CI@SiO_(2)/1,1,1,3,3,3-hexamethyl disilazane(HMDS))were fabricated via a facile one-pot synthesis using tetraethyl orthosilicate(TEOS)and HMDS as the precursor of protective layer(SiO_(2)/HMDS),and CI@SiO_(2)/HMDS hybrid reveals its long-term corrosion resistance and excellent microwave absorption performance with a minimum reflection loss value of−44.3 dB and an effective absorption bandwidth of 5.3 GHz at a thin thickness of 2.0 mm after immersion in 5.0 wt.%NaCl acidic solutions for 2,160 ***,CI@SiO_(2)/HMDS hybrid can still achieve the maximum radar cross-sectional(RCS)reduction values about 16.5 dB·m^(2) at the detectionθof 0°.The exceptional microwave absorption performance and structural stability are largely due to the extraordinary wave-transparent property and shielding ability against corrosive medium of SiO_(2)/HMDS hydrophobic protective layer with a contact angle of 132.5°.The research paves the way for the large-scale and batch production of high-performance magnetic metallic absorbers and increases their survivability and reliability in the harsh environments.

关键词： microwave absorption long-term corrosion resistance carbonyl iron(CI)@SiO_(2)/1 1 1 3 3 3-hexamethyl disilazane(HMDS)hybrid core-shell radar cross-sectional simulation

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Understanding a Single-Li-Ion COF Conductor for Being Dendrite Free in a Li-Organic Battery

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Research 2023年第1期2022卷 209-218页

作者： Yongjiang Sun Genfu Zhao Yao Fu Yongxin Yang Conghui Zhang Qi An Hong Guo School of materials and energy Yunnan UniversityNo.2Green Lake North RoadKunming 650091China

In addition to improving ion conductivity and the transference number,single-Li-ion conductors(SLCs)also enable the elimination of interfacial side reactions and concentration difference ***,the SLCs can achieve high performance in solid-state batteries with Li metal as anode and organic molecule as *** organic frameworks(COFs)are leading candidates for constructing SLCs because of the excellent 1D channels and accurate chemical-modification ***,various contents of lithium-sulfonated covalently anchored COFs(denoted as LiO,S-COF1 and LiO,S-COF2)are controllably synthesized as *** to the directional ion channels,high Li contents,and single-ion frameworks,LiO,SCOF2 shows exceptional Li-ion conductivity of 5.47×10^(-5)***^(-1),high transference number of 0.93,and low activation energy of 0.15eV at room *** preeminent Li-ion-transported properties of LiO_(3)S-F2 permit stable Li+plating/stripping in a symmetric lithium metal battery,effectively impeding the Li dendrite growth in a liquid ***,the designed quasi-solid-state cell(organic anthraquinone(AQ)as cathode,Li metal as anode,and LiO_(3)S-COF2 as electrolyte)shows high-capacity retention and rate ***,LiO_(3)S-COF2 implies a potential value restraining the dissolution of small organic molecules and Li dendrite growth.

关键词： lithium Battery restrain

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Omnidirectional annealing process for scalable perovskite films

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International Journal of Minerals,Metallurgy and materials 2022年第8期29卷 1491-1492页

作者： Bo Cheng Dong Wang Qianqian Chu Liang Chu State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals School of Materials Science and EngineeringLanzhou University of Tech-nologyLanzhou 730050China Institute of Carbon Neutrality and New energy&School of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China

Halide perovskites are promising photovoltaic materials due to the outstanding photoelectric properties and low-cost solution pro-cess;however,the low scalability and reproducibility of perovskite films hinder the *** medium annealing(LMA)method has provided a robust liquid environment and an omnidirectional heating field to modulate the growth of perovskite films for high quality with low defect density,desirable stoichiometry,high homogeneity,and less environmental *** fabricated perovskite solar cells exhibited excellent reproducibility and power conversion efficiencies exceeding 24.04%with 0.08 cm^(2) area and 23.15%with 1 cm^(2) area.

关键词： halide perovskite scalable and reproducible fabrication liquid medium annealing

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Capturing the non-equilibrium state in light–matter–free-electron interactions through ultrafast transmission electron microscopy

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Chinese Physics B 2024年第1期33卷 88-101页

作者：汪文韬孙帅帅李俊郑丁国黄思远田焕芳杨槐馨李建奇 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake materials Laboratory Dongguan 523808China Yangtze River Delta Physics Research Center Co. Ltd.LiyangJiangsu 213300China

Ultrafast transmission electron microscope(UTEM) with the multimodality of time-resolved diffraction, imaging,and spectroscopy provides a unique platform to reveal the fundamental features associated with the interaction between free electrons and matter. In this review, we summarize the principles, instrumentation, and recent developments of the UTEM and its applications in capturing dynamic processes and non-equilibrium transient states. The combination of the transmission electron microscope with a femtosecond laser via the pump–probe method guarantees the high spatiotemporal resolution, allowing the investigation of the transient process in real, reciprocal and energy spaces. Ultrafast structural dynamics can be studied by diffraction and imaging methods, revealing the coherent acoustic phonon generation and photoinduced phase transition process. In the energy dimension, time-resolved electron energy-loss spectroscopy enables the examination of the intrinsic electronic dynamics of materials, while the photon-induced near-field electron microscopy extends the application of the UTEM to the imaging of optical near fields with high real-space resolution. It is noted that light–free-electron interactions have the ability to shape electron wave packets in both longitudinal and transverse directions, showing the potential application in the generation of attosecond electron pulses and vortex electron beams.

关键词： ultrafast transmission electron microscopy non-equilibrium structural dynamics photo-induced phase transition free-electron–photon interactions

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Remarkable catalysis of spinel ferrite XFe2O4(X=Ni,Co,Mn,Cu,Zn)nanoparticles on the dehydrogenation properties of LiAlH_(4):An experimental and theoretical study

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Journal of materials Science & Technology 2022年第16期111卷 189-203页

作者： Sheng Wei Jiaxi Liu Yongpeng Xia Huanzhi Zhang Riguang Cheng Lixian Sun Fen Xu Pengru Huang Federico Rosei Aleskey A.Pimerzin Hans Jüergen Seifert Hongge Pan School of Material Science&Engineering Guangxi Key Laboratory of Information Materials and Guangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialsGuilin University of Electronic TechnologyGuilin 541004China School of Mechanical&Electrical Engineering Guilin University of Electronic TechnologyGuilin 541004China CentreÉnergie Matériaux et TélécommunicationsInstitut National de la Recherche Scientifique1650 Boul.Lionel BouletVarennesJ3×1S2QuébecCanada Samara State Technical University Samara443100Russia Institute for Applied materials Karlsruhe Institute of TechnologyHermann von Helmholtz Platz 176344 Eggenstein LeopoldshafenGermany School of New energy Science and Technology Xi’an Technological UniversityXi’an 710021China

Safe,compact,lightweight and cost-effective hydrogen storage is one of the main challenges that need to be addressed to effectively deploy the hydrogen ***_(4),as a solid-state hydrogen storage material,presents several advantages such as high hydrogen storage capacity,low price and abundant ***,neither thermodynamic nor kinetic properties of dehydrogenation for LiAlH_(4)can fulfill the requirements of practical ***,a series of spinel ferrite nanoparticles such as XFe_(2)O_(4)(X=Ni,Co,Mn,Cu,Zn,Fe)were prepared by using the modified thermal decomposition method,and then doped into LiAlH_(4)by using ball *** results show that LiAlH_(4)doped with 7 wt%NiFe_(2)O_(4)starts to release hydrogen at 69.1°C,and the total amount of hydrogen released is 7.29 wt%before 300°*** activation energies of the two-step hydrogen release reactions of LiAlH_(4)doped with 7 wt%NiFe_(2)O_(4)are 42.32 kJ mol^(-1)and 71.42 k J mol,which are 59.0%and 63.6%lower than those of as-received LiAlH_(4),*** the density functional theory(DFT)calculations,we reveal that both the presence of Ni FeOand in-situ formed AlNiin ball-milling decrease the desorption energy barrier of Al-H bonding in LiAlH_(4)and accelerate the breakdown of Al-H bonding through the interfacial charge transfer and the dehybridization of the Al-H ***,the experimental and theoretical results open a new avenue toward designing high effective catalysts applied to LiAlH_(4)as a candidate for hydrogen storage.

关键词： Hydrogen storage Lithium aluminum Spinel ferrite nanoparticles

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A critical review of key materials and issues in solid oxide cells

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Interdisciplinary materials 2023年第1期2卷 111-136页

作者： Shuai He Yuanfeng Zou Kongfa Chen San P.Jiang High-temperature Hydrogen Production Laboratory Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong LaboratoryFoshanChina Department of materials Science and Engineering Fuzhou UniversityFuzhouFujianChina WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerthWestern AustraliaAustralia

Solid oxide cells(SOCs)are all solid ceramic devices with the dual functionality of solid oxide fuel cells(SOFCs)to convert the chemical energy of fuels like H2,natural gas and other hydrocarbons to electricity and of solid oxide electrolysis cells(SOECs)to store renewable electric energy of sun and wind in hydrogen *** the electrochemical energy conversion and storage devices,SOCs are the most clean and efficient technology with unique dual *** to the high operation temperature(typically 600–800°C),SOCs exhibit many advantages over other energy conversion devices,such as low material cost,high efficiency and fuel *** has been rapid development of SOC technologies over the last decade with significant advantages and progress in key materials and a fundamental understanding of key issues such as an electrode,electrolyte,performance degradation,poisoning,and stack *** reversible polarization also has a critical effect on the surface segregation and stability of the electrode and electrode/electrolyte *** critical review starts with a brief introduction,working principles and thermodynamics of SOC technology to readers with interests in this rapidly developing and emerging *** the key materials currently used in SOCs are summarized,followed by the discussion of the most advanced electrode modification methods and critical issues of SOCs,including the surface chemistry,segregation,electrode/electrolyte interface and varying material degradation mechanisms under reversible *** challenges and prospects of SOC technology for future developments are discussed.

关键词： critical review key materials and interface operating principles prospects and challenges solid oxide cells

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Effects of Temperature and Liquid Nitrogen(LN2)on Coal’s Mechanical and Acoustic Emission(AE)Properties

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Fluid Dynamics & materials Processing 2024年第6期20卷 1181-1202页

作者： Teng Teng Yuhe Cai Linchao Wang Yanzhao Zhu Inner Mongolia Research Institute China University of Mining and Technology-BeijingOrdos017001China Beijing Key Laboratory for Precise Mining of Intergrown energy and Resources China University of Mining and Technology-BeijingBeijing100083China School of Civil Engineering and Architecture Xi’an University of TechnologyXi’an710048China

Liquid nitrogen has shown excellent performances as a good fracturing medium in the extraction of unconventional natural gas,and its application in coalbed methane extraction is currently a research *** study focuses on the acoustic emission properties of coal specimens treated utilizing liquid nitrogen with varying initial temperatures in a three-point bending *** examination of the load-displacement curves of the considered coal samples,their mechanical properties are also revealed for different initial temperatures and cycling *** findings demonstrate a gradual decline in the maximum load capacity of coal rock as the temperature ***,when subjected to the same temperature,an escalation in the cycling frequency leads to a reduction in the peak load of coal *** suggests that both temperature and cycling frequency exert a notable impact on the fracturing efficacy of liquid ***-thaw cycling treatments and exposure to high-temperature conditions can activate preexisting damage in the coal rock,and,accordingly,influence its mechanical *** particular,throughout the progressive loading of coal rock samples,the failure mechanisms are predominantly characterized by the occurrence of tensile cracks,succeeded by the development,spread,and fracture of shear fissures.

关键词： Liquid nitrogen fracturing three-point bending experiment mechanical characteristics

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Neutronic study on the effect of first wall material thickness on tritium production and material damage in a fusion reactor

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Nuclear Science and Techniques 2022年第4期33卷 33-50页

作者： HacıMehmet S¸ahin Güven Tunc¸ Alper Karakoc¸ Melood Mohamad Omar Department of energy Systems Engineering Technology FacultyKarabuk UniversityKarabukTurkey Department of energy Systems Engineering Technology FacultyGazi UniversityAnkaraTurkey Department of energy Systems Engineering Institute of Graduate ProgramsKarabuk UniversityKarabukTurkey

In this study,the effects of changing first wall materials and their thicknesses on a reactor were investigated to determine the displacement per atom(DPA)and gas production(helium and hydrogen)in the first wall,as well as the tritium breeding ratio(TBR)in the coolant and tritium breeding ***,the modeling of the magnetic fusion reactor was determined based on the blanket parameters of the International Thermonuclear Experimental Reactor(ITER).Stainless steel(SS 316 LNIG),Oxide Dispersion Strengthened Steel alloy(PM2000 ODS),and China low-activation martensitic steel(CLAM)were used as the first wall(FW)*** family molten salt materials(FLiBe,FLiNaBe,FLiPb)and lithium oxide(LiO_(2))were considered the coolant and tritium production material in the blanket,*** transport calculations were performed using the wellknown 3D code MCNP5 using the continuous-energy Monte Carlo *** built-in continuous energy nuclear and atomic data libraries along with the Evaluated Nuclear Data file(ENDF)system(ENDF/B-V and ENDF/B-VI)were ***,the activity cross-section data library CLAW-IV was used to evaluate both the DPA values and gas production of the first wall(FW)*** interface computer program written in the FORTRAN 90 language to evaluate the MCNP5 outputs was developed for the fusion reactor *** results indicated that the best TBR value was obtained for the use of the FLiPb coolant,whereas depending on the thickness,the first wall replacement period in terms of radiation damage to all materials was between 6 and 11 years.

关键词： ITER First wall material Material damage Tritium breeding ratio Fluorides family molten salt materials

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Photoelectrochemical effect of Cu_(2)O on the corrosion behavior of Cu in sodium sulfate solution

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Journal of materials Science & Technology 2023年第29期160卷 46-54页

作者： Jiarun Li Feng Qian Chongqing Guo Ning Wang Zhuoyuan Chen Lei Wang School of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042China Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China School of materials Science and Hydrogen energy Foshan UniversityFoshan 528000China

The electrochemical associated with photoelectrochemical behaviors of Cu electrodeposited with Cu_(2)O layer were investigated in this *** corrosion of Cu was promoted due to the enhanced anodic and cathodic processes under AM 1.5illumination compared with that in the darkness,especially for the anodic *** photoinduced corrosion of Cu by Cu_(2)O was detected by Scanning Vibrating Electro Technique(SVET).The effect of Cu_(2)O on the promotion of Cu corrosion under illumination can be as-cribed to the narrowed depletion layer in Cu_(2)O under illumination,which facilitates the separation of hole-electron *** resultant holes give rise to the oxidation of the Cu matrix and lead to a pro-moted corrosion ***,a method for in-situ determining the photoinduced current of a semiconductor material is proposed.

关键词： Photoinduced corrosion Cu_(2)O Copper SVET P-type semiconductor

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Aqueous Zn^(2+)/Na^(+) dual-salt batteries with stable discharge voltage and high Coulombic efficiency by systematic electrolyte regulation

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Science China Chemistry 2022年第2期65卷 399-407页

作者： Chunli Wang Lianshan Sun Maoxin Li Lin Zhou Yong Cheng Xin Ao Xiuyun Zhang Limin Wang Bingbing Tian Hong Jin Fan SZU-NUS Collaborative Innovation Center for Optoelectronic Science&Technology International Collaborative Laboratory of 2D Materials for Optoelectronic Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China School of Physical and Mathematical Science Nanyang Technological UniversitySingapore 637371Singapore China-Singapore International Joint Research Institute Guangzhou 510663China College of Physics Science and Technology Yangzhou UniversityYangzhou 225002China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryCASChangchun 130022China Institute for energy Research Jiangsu UniversityZhenjiang 212013China

While aqueous Zn-Na hybrid batteries have garnered widespread attention because of their low cost and high safety,it is still challenging to achieve long cycle-life and stable discharge-voltage due to sluggish reaction kinetics,zinc dendrite formation,and side ***,we design a Zn^(2+)/Na^(+) dual-salt battery,in which sodiation of the NVP cathode favors zinc intercalation under an energy threshold,leading to decoupled redox reactions on the cathode and *** investigations of the electrolyte effects show that the ion intercalation mechanism and the kinetics in the mixture of triflate-and acetate-based electrolytes are superior to those in the common acetate-only *** a result,we have achieved fast discharging capability,suppressed zinc dendrites,a stable discharge voltage at 1.45 V with small polarization,and nearly 100%Coulombic efficiency in the dual-salt mixture electrolyte with optimized concentration of 1 M Zn(OAc)_(2)+1 M NaCF_(3)SO_(3).This work demonstrates the importance of electrolyte regulation in aqueous dual-salt hybrid batteries for the energy storage.

关键词： dual-salt battery high voltage acetate electrolyte zinc dendrite Na_(3)V_(2)(PO_(4))_(3)

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