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Reasonable Designing of Free-standing MnO_(2)/Graphene Composite Membrane for Lithium-ion Storage

Chemical Research in Chinese Universities 2024年第3期40卷 508-512页

作者： SHI Junye YU Chenxi ZOU Zewei ZHENG Shumin ZHANG Xing WANG Bao Institute of Refrigeration and Cryogenics Shanghai Jiao Tong University Shanghai 200433P.R.China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Key Laboratory of Biopharmaceutical Preparation and Delivery Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China CAS Key Laboratory of Molecular Nanostucture and Nanotechnology Institute of ChemistryChinese Academy of SciencesBeijing 100190P.R.China

Free-standing membranes show extraordinary promise in energy storage applications,however are usually limited by low capacity and poor rate ***,we assembled a series of free-standing MnO_(2)/GO composite membranes with ZIF67 particles embedded between two-dimensional(2D)*** particle size of ZIF67 can be adjusted to achieve tunable interlayer *** lithium storage performance of the as-obtained membranes with different interlayer spaces was systematically *** MnO_(2)/GO composite membrane embedded with ZIF67 particles with an average diameter of 30 nm(denoted as MnO_(2)/nZIF67/GO)delivers a good long cycling performance,and it retains a capacity of 340.7 mA·h·g^(−1) after 400 cycles at 0.05 A/*** MnO_(2)/GO composite membrane embedded with ZIF67 particles with an average diameter of 500 nm(denoted as MnO_(2)/mZIF67/GO)exhibits good rate *** of the size of the ZIF67 particles,the performance of the membrane containing ZIF67 is significantly better than that of the membrane without ZIF67,indicating that the ZIF67 particles can enhance the lithium storage performance of the assembled *** work provides a method to fabricate a free-standing membrane for lithium storage with tunable electrochemical performance.

关键词： Lithium-ion battery Membrane Free-standing ZIF67

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Design and development of a lightweight cryogenic system for high temperature superconducting(HTS)filters subsystem

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Science China(Technological Sciences) 2022年第3期65卷 735-739页

作者： DUAN YanBo WANG Jue WANG Wei WU ShanShan QI HaoYing WANG ZeKun FANG ChuShu HUANG RongJin LI LaiFeng ZHOU Yuan CAS Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China CASIC Space Engineering Development Co.Ltd. Beijing 100854China

Since the discovery of high temperature superconducting(HTS)materials in the 1980 s,HTS filters and motors have developed rapidly[1,2].The extremely low insertion loss and frequency selectivity of the HTS filter make it possible to greatly improve the signal receiving sensitivity and suppress interference ***,it has great potential in aerospace application,satellite communications,mobile base stations,deep space exploration,radar,and other fields[3,4].

关键词： filters high insertion

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Superior corrosion resistance-dependent laser energy density in(CoCrFeNi)95Nb5 high entropy alloy coating fabricated by laser cladding

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International Journal of Minerals,Metallurgy and Materials 2021年第5期28卷 888-897页

作者： Wen-rui Wang Wu Qi Xiao-li Zhang Xiao Yang Lu Xie Dong-yue Li Yong-hua Xiang School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of Fluid Interaction with Material Ministry of EducationBeijing 100083China R&D management department China nuclear power technology research institute Co.Ltd.Shenzhen 518031China Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Unit 92228 People’s Liberation ArmyBeijing 100072China

(CoCrFeNi)95Nb5 high entropy alloy(HEA)coatings were successfully fabricated on a substrate of Q235 steel by laser cladding ***(CoCrFeNi)95Nb5 HEA coatings possess excellent properties,particularly corrosion resistance,which is clearly superior to that of some typical bulk HEA and common engineering *** order to obtain appropriate laser cladding preparation process parameters,the effects of laser energy density on the microstructure,microhardness,and corrosion resistance of(CoCrFeNi)95Nb5 HEA coating were closely *** showed that as the laser energy density increases,precipitation of the Laves phase in(CoCrFeNi)95Nb5 HEA coating gradually decreases,and diffusion of the Fe element in the substrate intensifies,affecting the integrity of the(CoCrFeNi)95Nb5 *** decreases the microhardness of(CoCrFeNi)95Nb5 HEA ***,the relative content of Cr2O3,Cr(OH)3,and Nb2O5 in the surface passive film of the coating decreases with increasing energy density,causing corrosion resistance to *** study demonstrates the controllability of a high-performance HEA coating using laser cladding technology,which has significance for the laser cladding preparation of other CoCrFeNi-system HEA coatings.

关键词： high entropy alloy coating laser cladding technology laser energy density corrosion resistance

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Icephobic performance on the aluminum foil-based micro-/nanostructured surface

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Chinese Physics B 2017年第4期26卷 351-355页

作者：陈宇刘桂成姜磊金志永叶锋李重基王磊王波 College of Materials Science and Engineering Beijing University of Technology Center for Energy Convergence Research Green City Research InstituteKorea Institute of Science and Technology (KIST) Industrial Centre The Hong Kong Polytechnic University State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of Sciences Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of Sciences

The research of superhydrophobic materials has attracted many researchers＇ attention due to its application value and *** order to expand the serviceable range,people have investigated various superhydrophobic *** simple and easy preparation method has become the focus for superhydrophobic *** this paper,we present a program for preparing a rough surface on an aluminum foil,which possesses excellent hydrophobic properties after the treatment with low surface energy materials at high *** resulting contact angle is larger than 160° and the droplet cannot freeze on the surface above-10 ℃.Meanwhile,the modified aluminum foil with the thickness of less than 100 μm can be used as an ideal flexible applied material for superhydrophobicity/anti-icing.

关键词： aluminum foil micro-nanostructure superhdrophobicity anti-icing flexibility

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Liquid metal droplet dynamics

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Droplet 2024年第1期3卷 61-94页

作者： Xi Zhao Mengwen Qiao Yingxin Zhou Jing Liu Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijingChina School of Future Technology University of Chinese Academy of SciencesBeijingChina Department of Biomedical Engineering School of MedicineTsinghua UniversityBeijingChina

The unique properties to combine the dual merits of both liquids and metals together make the gallium‐based liquid metal(LM)droplets a class of unconventional substitute which possess great potential for a group of newly emerging areas,such as stretchable electronics,soft devices,micro sensors and *** addition,LM droplets are undoubtedly an intriguing target worth of pursuing in fundamental hydrodynamic investigations due to their extremely high surface tension nature compared to classical nonmetallic *** the discovery of the diverse transformation phenomena and self‐fueled droplet mollusks of LM that can move automatically in solution via single electricity or even without any external energy supply,tremendous attentions were attracted to this special fluidic object of LM *** the past decade,there has been a proliferation of explorations on LM droplet dynamics,while the involved contents are heterogeneous due to the interfacial physical/chemical activity of the LM and the diversity of the kinetic *** better understand and manipulate the droplet behavior and to promote further development of the LMs,this review is dedicated to summarize the latest progress and presents an overview on basic findings related to LM macrodroplet ***,the extended definition of LM droplets and the corresponding fabrication methods are ***,typical works on LM droplet dynamics are systematically interpreted based on their different behavior ***,the perspectives,main obstacles and challenges restricting the development of LM droplet dynamics are pointed out.

关键词： dynamics behavior doubt

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Study on surface discharge of nonlinear conductive epoxy resin/SrTiO3 composites in 80–300 K temperature zone

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High Voltage 2024年第1期9卷 117-126页

作者： Yunqi Xing Bin Wang Mingyang Wang Jiakai Chi Peng Jia Rongjin Huang State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of TechnologyTianjinChina Key Laboratory of Electormagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of TechnologyTianjinChina Key Laboratory of Special Machine and High Voltage Apparatus(Ministry of Education) Shenyang University of TechnologyShenyangChina State Grid Tianjin High Voltage Company TianjinChina China Energy Engineering Group Tianjin Electric Power Design Institute Co. Ltd.TianjinChina CAS Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryBeijingChina

Bisphenol F epoxy resin(EP)is often used in terminal current lead insulation of superconducting equipment because of its good insulation performance,high mechanical strength,good toughness at cryogenic temperatures,and resistance to cold shock and heat ***,due to the wide temperature range of 80–300 K and the strong electric field,the EP-N_(2)interface is prone to surface flashover,resulting in terminal insulation *** improve the reliability of the current lead insulation,non-linear conductive EP/strontium titanate(SrTiO_(3))composites were prepared by modification with nano *** changes of dielectric,surface discharge,flashover,and trap distribution characteristics of composite materials were studied,and the mechanism of SrTiO_(3)on the surface flashover of composite materials was *** results show that the conductivity of the composite increases with the rise of SrTiO_(3)filling content,and the amplitude of improvement is greater under the strong electric field,showing a more significant *** composite has a lower trap energy level and a greater number of shallow traps compared to pure EP,which accelerates surface charge detrapping and reduces charge accumulation,effectively enhancing the discharge and surface flashover voltage of the composite.

关键词： composites composite insulation

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Powder x-ray diffraction and Rietveld analysis of (C_(2)H_(5)NH_(3))_(2)CuCl_(4)

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Chinese Physics B 2021年第6期30卷 58-61页

作者： Yi Liu Jun Shen Zunming Lu Baogen Shen Liqin Yan Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China School of Material Science and Engineering Hebei University of TechnologyTianjin 300130China

Structural properties of the organic-inorganic hybrid(C_(2)H_(5)NH_(3))_(2)CuCl_(4) have been investigated by means of x-ray powder diffraction and Rietveld analysis. A structural phase transition from Pbca to Aba2 occurs at T_(4)= 240 K, which results in a paraelectric–ferroelectric phase transition. The release of the Jahn–Teller distortion with increasing temperature toward T_(4) is revealed by the structural analysis.

关键词： organic-inorganic hybrid x-ray diffraction (C_(2)H_(5)NH_(3))_(2)CuCl_(4)

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Counterintuitive Ballistic and Directional Liquid Transport on a Flexible Droplet Rectifier

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Research 2020年第1期2020卷 1009-1019页

作者： Lei Wang Jing Li Bo Zhang Shile Feng Mei Zhang Dong Wu Yang Lu Ji Jung Kai Jing Liu Zuankai Wang Lei Jiang Beijing Key Lab of Cryo-Biomedical Engineering and Key Lab of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Department of Mechanical Engineering City University of Hong KongHong Kong 999077China Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Precision Machinery and Precision InstrumentationUniversity of Science and Technology of ChinaHefeiAnhui 230027China

Achieving the directional and long-range droplet transport on solid surfaces is widely preferred for many practical applications but has proven to be ***,directionality and transport distance of droplets on hydrophobic surfaces are mutually ***,we report that drain fly,a ubiquitous insect maintaining nonwetting property even in very high humidity,develops a unique ballistic droplet transport mechanism to meet these demanding *** drain fly serves as a flexible rectifier to allow for a directional and long-range propagation as well as self-removal of a droplet,thus suppressing unwanted liquid *** investigation reveals that this phenomenon is owing to the synergistic conjunction of multiscale roughness,structural periodicity,and flexibility,which rectifies the random and localized droplet nucleation(nanoscale and microscale)into a directed and global migration(millimeter-scale).The mechanism we have identified opens up a new approach toward the design of artificial rectifiers for broad applications.

关键词： directional mechanism roughness

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Effects of process parameters on semi-solid squeeze casting performance of aluminum alloy scrolls for scroll compressors

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China Foundry 2020年第5期17卷 347-356页

作者： Yong-fei Wang Sheng-dun Zhao Yi Guo Jun-ling Yang School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China School of Energy and Power Engineering Xi’an Jiaotong UniversityXi’an 710049China CAS Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryBeijing 100190China

The aluminum alloy scroll is one of the key parts of the scroll compressors widely used in the air-conditioning,refrigeration,and heat pump *** this work,the semi-solid squeeze casting(SSSC)process was used to fabricate the aluminum alloy *** effects of process parameters including the pouring temperature,mold temperature,and squeezing velocity on the filling and solidification behaviors of the alloys were investigated through simulations based on the power law cut-off(PLCO)material *** show that there is a significant increase in the flow velocity of the slurry,and the area of the high-speed region enlarges with the increase of the pouring *** homogeneity of the temperature and velocity fields in the slurry is improved with an increase in mold *** the filling time and its variation rate decrease with an increase in squeezing *** maximum solidification time exhibits a linear variation with the increase in pouring *** shrinkage area is decreased by increasing the mold *** optimal process parameters of the SSSC process were obtained from simulation analysis,which are the pouring temperature of 595°C,mold temperature of 350°C,and squeezing velocity of 0.3 m·***,the qualified scroll casting was fabricated using the SSSC process under the optimal process parameters.

关键词： semi-solid squeeze casting aluminum alloy scroll compressor numerical simulation experimental verification

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Superoxide dismutase mimetic ability of Mn-doped ZnS QDs

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Chinese Chemical Letters 2018年第12期29卷 1865-1868页

作者： Xiangling Ren Mingqian Wang Xing He Zheng Li Jing Zhang Wei Zhang Xudong Chen Hong Ren Xianwei Meng Laboratory of Controllable Preparation and Application of Nanomaterials Key Laboratory of CryogenicsTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China First Affiliated Hospital of Southern University of Science and Technology Shenzhen People's Hospital&Shenzhen Interventional Medical Engineering Research and Development CenterShenzhen 518020China Beijing University of Chemical Technology Beijing 100029China Beijing Technology&Business University Beijing Higher Institution Engineering Research Center of Food Additives and IngredientsBeijing Key Laboratory of Flavor ChemistryBeijing Laboratory for Food Quality and SafetyBeijing 100048China University of Chinese Academy of Sciences Beijing 100049China

Superoxide dismutase(SOD) is an important antioxidant enzyme in the body. SOD has special physiological activity and is the primary substance for scavenging free radicals in living ***, the expensive and complex extraction processes, low SOD yield, as well as difficult to store at room temperature have seriously hindered its application pace. Herein, the enzyme mimetic function of Mn-doped ZnS quantum dots(QDs) was discovered. The improved Marklund and McCord method both showed that Mn-doped ZnS QDs possess intrinsic SOD-like activity. The effects of temperature and pH on the mimetic enzyme activity of Mn-doped ZnS QDs have been investigated compared with SOD *** low cost and easy to synthesize white Mn-doped ZnS QDs with good biocompatibility are expected to be used as a new type of SOD nanozymes in the biology-relevant fields.

关键词： Mn-doped ZnS QDs Superoxide dismutase Nanozymes Marklund method Pyrogallol

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