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A two-step strategy for constructing stable gel polymer electrolyte interfaces for long-life cycle lithium metal batteries

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Journal of Materiomics 2022年第5期8卷 1048-1057页

作者： Qiujun Wang Pin Zhang Weiqi Zhu Di Zhang Zhaojin Li Huan Wang Huilan Sun Bo Wang Li-Zhen Fan Hebei Key Laboratory of Flexible Functional Materials School of Materials Science and EngineeringHebei University of Science and TechnologyShijiazhuang050018China Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083China

Due to the high reactivity between the lithium metal and traditional organic liquid electrolyte,the reaction of lithium metal electrode is usually uneven and there are also unexpected side ***,construction of a stable solid electrolyte interface(SEI)is highly essential to improve the performance of lithium metal ***,a sandwich-like gel polymer electrolyte(GPE)is accurately prepared by in-situ polymerization of Polyacrylonitrile(PAN)nanofiber membrane with trihydroxymethylpropyl trimethylacrylate(TMPTMA)and 1,6-hexanediol diacrylate(HDDA).The resulting GPE with a tightly cross-linked gel skeleton exhibits high ionic conductivity and electrochemical window of 5.6 V versus Li/Li^(+).In particular,the pretreatment of Li metal anode can improve the interfacial wettability,and the synergy of the chemically pretreated Li metal anode surface and the GPE can electrochemically in situ generate SEI with compositionally stable and fluorine-rich inorganic *** to these unique advantages,the interfacial compatibility between the GPE and lithium metal is greatly ***,the formed SEI can inhibit the formation of lithium dendrites,and decomposition of GPE would be *** assembled Li-FEC|GPE|LiFePO_(4) full cell shows a high initial discharge capacity of 157.1 mA h g^(-1),and maintains a capacity retention of 92.3%after 100 cycles at 0.2C.

关键词： Gel polymer electrolyte Pre-lithiation Lithium-metal batteries In-situ polymerization

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Deployment of SMP Miura-ori sheet and its application:Aerodynamic drag and RCS reduction

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Chinese Journal of Aeronautics 2022年第8期35卷 121-131页

作者： Ji ZHANG Changguo WANG Lamei ZHANG National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin 150001China Department of Information Engineering Harbin Institute of TechnologyHarbin 150001China

Origami,such as Miura-ori,is the art of folding two-dimensional materials into complex,elaborate,and multifunctional three-dimensional *** this paper,SMP MO sheet are prepared,and the accuracy of deployable process is verified by *** folding and deployable process of SMP MO sheet is divided into 4 stages,and each stage is described in *** stiffness of smart deployable stage is characterized by an exponential decline at the beginning and a gradual decrease to 0,and this is similar to the theoretical shear equivalent modulus in the Y *** effects of various parameters on strain and stress are also *** purpose of studying these mechanical characteristics is to provide driving force reference in application;In terms of application,the flow field and electromagnetic characteristics of MO sheet in different directions are *** aerodynamic drag and RCS reduction of MO unit cell and graded MO sheet during the deployable process are *** the dihedral fold angle is about 45°,the RCS reduction and drag reduction characteristics of MO sheet are relatively optimal,which is most beneficial to morphing aircraft.

关键词： Aerodynamic characteristics Deployment Miura-Ori Morphing aircraft RCS reduction SMP sheet

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Synergetic enhancement of selectivity for electroreduction of CO_(2)to C_(2)H_(4)by crystal facet engineering and tandem catalysis over silver-incorporated-cuprous oxides

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Materials Reports(Energy) 2023年第2期3卷 164-172,I0004页

作者： Gang Dong Chuang Xue Meng Li Tiantian Zhang Dongsheng Geng Li-Min Liu Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface ScienceSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083PR China School of Physics Beihang UniversityBeijing100083PR China

Electrochemical CO_(2)reduction to C_(2)H_(4)can provide a sustainable route to reduce globally accelerating CO_(2)emissions and produce energy-rich chemical ***,the poor selectivity in C_(2)H_(4)electrosynthesis limits its implementation in industrially interesting ***,we report a composite structured catalyst composed of Ag and Cu_(2)O with different crystal faces to achieve highly efficient reduction of CO_(2)to C_(2)H_(4).The catalyst composed of Ag and octahedral Cu_(2)O enclosed with(111)facet exhibits the best CO_(2)electroreduction performance,with the Faradaic efficiency(FE)and partial current density reaching 66.8%and 17.8 mA cm2 for C_(2)H_(4)product at-1.2 VRHE in 0.5 M KHCO_(3),*** characterization and electrochemical test analysis indicate that the high selectivity for C_(2)H_(4)product stems from the synergistic effect of crystal faces control engineering and tandem ***,Ag can provide optimal availability of CO intermediate by suppressing hydrogen evolution;subsequently,C-C coupling is promoted on the intimate surface of Cu_(2)O with facetdependent *** insights gained from this work may be beneficial for designing efficient multicomponent catalysts for improving the selectivity of electrochemical CO_(2)reduction reaction to generate C2þproducts.

关键词： Cu_(2)O/Ag tandem catalysts Facet-dependent selectivity CO_(2)reduction reaction C_(2)H_(4) Electrocatalysis Synergistic effect

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Medium-entropy(Me,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)(Me=Y and Ta):Promising thermal barrier materials for high-temperature thermal radiation shielding and CMAS blocking

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Journal of Materials science & technology 2022年第28期123卷 144-153页

作者： Shuaihang Qiu Huimin Xiang Fu-Zhi Dai Hailong Wang Muzhang Huang Chunlei Wan Qing Meng Jiangtao Li Xiaohui Wang Yanchun Zhou Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials and Processing TechnologyBeijing 100076China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100190China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

With continuous enhancement of gas-turbine inlet temperature and rapid increase of radiant heat transfer,thermal barrier coating(TBC)materials with a combination of low thermal conductivity and good high-temperature thermal radiation shielding performance play vital roles in ensuring the durability of metallic ***,yttria-stabilized zirconia(YSZ),as the state-of-the-art TBC and current industry standard,is unable to meet such demands since it is almost translucent to high-temperature thermal ***,poor corrosion resistance of YSZ to molten calcia-magnesia-alumina-silicates(CMAS)also impedes its application in sand,dust,or volcanic ash laden *** order to improve the hightemperature thermal radiation shielding performance and CMAS resistance of YSZ and further reduce its thermal conductivity,two medium-entropy(ME)oxide ceramics,ME(Y,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)and ME(Ta,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2),were designed and prepared by pressureless sintering of binary powder compacts in this ***(Y,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)presents cubic structure but a trace amount of secondary phase,while ME(Ta,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)displays a combination of tetragonal phase(81.6 wt.%)and cubic phase(18.4 wt.%).Both ME(Y,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)and ME(Ta,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)possess better high-temperature thermal radiation shielding performance than ***,the high-temperature thermal radiation shielding performance of ME(Ta,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)is superior to that of ME(Y,Ti)_(0.1)(Zr,Hf,Ce)_(0.9)O_(2)due to its narrower band gap and correspondingly higher infrared absorbance(above 0.7)at the waveband of 1 to 5μ*** two ME oxides also display significantly lower thermal conductivity than YSZ and close thermal expansion coefficients(TECs)to YSZ and Ni-based *** addition,the two ME oxides possess excellent CMAS *** attack by molten CMAS at 1250℃for 4 h,merely~2μm thick penetration

关键词： Medium-entropy ceramics Thermal barrier coatings Thermal radiation shielding CMAS resistance Infrared absorbance

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Internal magnetic-field-enhanced photogenerated charge separation in ferromagnetic TiO_(2)surface heterojunctions

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Journal of Materials science & technology 2023年第29期160卷 240-247页

作者： Guojing Wang Shirong Xiong Yonghui Chen Chunchang Wang Shasha Lv Ke Jia Yunjie Xiang Jianbo Liu Chong Liu Zhengcao Li School of Materials and Energy Lanzhou UniversityLanzhou 730000China State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Advanced Materials(MOE)School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Laboratory of Dielectric Functional Materials School of Physics and Material ScienceAnhui UniversityHefei 230601China Key Laboratory of Beam Technology Ministry of EducationCollege of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China School of Materials and Energy Southwest UniversityChongqing 404100China

The use of the internal magnetic field of ferromagnets can effectively promote charge separation and transfer(CST)in photoelectrochemical energy ***,photoelectrochemical materials with a ferromagnetic field are scarce,and the internal magnetic field is negligible in nonferromagnetic *** address this issue,we propose a rational method for preparing ferromagnetic TiO_(2)powder using controllable oxygen vacancies in anatase TiO_(2)with co-exposed{001}and{101}***,an ex-cellent saturation magnetisation of 0.0014 emu/g in TiO_(2)is achieved owing to an asymmetric and uneven charge *** with that of nonferromagnetic TiO_(2),the efficiency of photocatalytic hydro-gen generation of ferromagnetic TiO_(2)is improved by 0.64 *** enhancement of photocatalytic hy-drogen generation is due to the different forces exerted on the electrons and holes in the magnetic field,which significantly improve the photogenerated CST efficiency of ferromagnetic TiO_(2).This result high-lights the significant role of the synergistic regulation of the crystal structure and defects in regulating the ferromagnetic characteristics of *** findings of this study provide guidance for leveraging point defects to promote CST for high-efficiency solar-energy conversion systems.

关键词： Photocatalysis TiO_(2){001}-{101}surface heterojunctions Oxygen vacancies Ferromagnetic

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The applications of single-atom alloys in electrocatalysis:Progress and challenges

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SmartMat 2023年第1期4卷 54-71页

作者： Yumin Da Rui Jiang Zhangliu Tian Xiaopeng Han Wei Chen Wenbin Hu Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhouChina Department of Chemistry National University of SingaporeSingaporeSingapore Tianjin Key Laboratory of Composite and Functional Materials Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education)School of Materials Science and EngineeringTianjin UniversityTianjinChina Department of Physics National University of SingaporeSingaporeSingapore

The development of cost-effective and highly efficient electrocatalysts to accelerate distinct electrochemical reactions is essential to help the industry to achieve a low-carbon ***-atom alloys(SAAs)with the characteristics of unique electronic structures,well-defined active sites,and maximum atom utilization demonstrate promising potential to replace traditional noble metal *** are expected to tailor the adsorption properties of reaction species,thus promoting electrocatalytic ***,representative synthetic strategies including wet chemistry,galvanic replacement,dealloying,and atomic layer deposition are introduced,followed by a summary of applications of SAAs in hydrogen evolution reaction,oxygen evolution reaction,oxygen reduction reaction,carbon dioxide reduction reaction,and ethanol electro-oxidation to provide an in-depth understanding of the structure–activity ***,the challenges and perspectives in this emerging field of SAAs are discussed.

关键词： electrocatalysis single-atom alloys structure-activity relationship synthesis

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Crystal plane induced in-situ electrochemical activation of manganese-based cathode enable long-term aqueous zinc-ion batteries

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Green Energy & Environment 2023年第5期8卷 1429-1436页

作者： Yuxin Gao Jiang Zhou Liping Qin Zhenming Xu Zhexuan Liu Liangbing Wang Xinxin Cao Guozhao Fang Shuquan Liang School of Materials Science and Engineering Central South UniversityChangsha410083HunanChina Graduate Department Guangxi University of Science and TechnologyLiuzhou545006GuangxiChina College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing210016JiangsuChina Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province Central South UniversityChangsha410083HunanChina

Rapid capacity decay and sluggish reaction kinetics are major barriers hindering the applications of manganese-based cathode materials for aqueous zinc-ion ***,the effects of crystal plane on the in-situ transformation behavior and electrochemical performance of manganese-based cathode is discussed.A comprehensive discussion manifests that the exposed(100)crystal plane is beneficial to the phase transformation from tunnel-structured MnO_(2) to layer-structured ZnMn_(3)O_(7)·3H_(2)O,which plays a critical role for the high reactivity,high capacity,fast diffusion kinetics and long cycling ***,a two-stage zinc storage mechanism can be demonstrated,involving continuous activation reaction and phase transition *** expected,it exhibits a high capacity of 275 mAh g^(-1)at 100 mA g^(-1),a superior durability over 1000 cycles and good rate *** study may open new windows toward developing advanced cathodes for ZIBs,and facilitate the applications of ZIBs in large-scale energy storage system.

关键词： Crystal plane Electrochemical activation Phase transition reaction Cycling stability Zinc-ion batteries

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Pressure-induced instability and its coupled aeroelasticity of inflated pillow

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Chinese Journal of Aeronautics 2022年第2期35卷 1-7页

作者： Ji ZHANG Changguo WANG Jiaming GUO Jiawei ZHANG National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China Special Environments Harbin Institute of TechnologyHarbin 150080China b Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150001China

A floating air weapon system(such as airborne floating mines)plays an important role in modern air defense *** paper focuses on aeroelastic characteristics of airborne floating mine named inflated ***,the dynamic deployable process of the pillow and characteristics of the local instability of the edge are studied,and the evolution mechanism of wrinkles and kinks is ***,in the cruising stage,the fluid-structural-thermal coupling analysis is performed on the pillow,and the aeroelastic characteristics are ***,the shapepreserving effect of the inflated pillow during the“negative pressure”slow landing stage is *** is found that when the wind velocity is higher,the pillow has a collapsed instability(surface extrusion and contact),and when the wind velocity is lower,snap-through instability ***,for the collapsed instability,a carbon fiber skeleton is added to discrete the large global collapsed fold into small local folds,thus achieving shape-preserving effect of *** snapthrough instability,the critical internal pressure and different shape evolution under different wind velocity are *** the analysis of the mechanical mechanism and control of the structural morphological evolution,it provides theoretical guidance for the application of the curved shell structure in floating air weapon system.

关键词： Aeroelastic analysis Fluid-structural-thermal coupling analysis Inflated pillow Kink Pressure-induced instability Wrinkle

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Over 500℃ stable transparent conductive oxide for optoelectronics

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InfoMat 2024年第12期6卷 98-111页

作者： Peng Li Fangchao Li Jiani Ma Dong Lin Jiangang Ma Lizhi Ding Junjun Guo Xingzhong Cao Junwei Shi Haiyang Xu Yichun Liu Key Laboratory of UV-Emitting Materials and Technology Ministry of EducationNortheast Normal UniversityChangchunChina Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Physical Science and TechnologySuzhou University of Science and TechnologySuzhouJiangsuChina Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhouJiangsuChina Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhouJiangsuChina Institute of High Energy Physics Chinese Academy of SciencesBeijingChina

High-temperature stable transparent conductive oxides(TCOs)are highly desirable in optoelectronics but are rarely achieved due to the defect generation that is inevitable during high-temperature air *** work reports unprecedented stability in aluminum and fluorine co-doped ZnO(AFZO)films prepared by pulse laser *** AFZO can retain a mobility of 60 cm^(2)V^(-1)s^(-1),an electron concentration of 4.5×10^(20)cm^(-3),and a visible transmittance of 91%after air-annealing at *** defect characterization and first principles calculations have revealed that the offset of substitutional aluminum by zinc vacancy is responsible for the instability observed in aluminum-doped ZnO,and the pairing between fluorine substitution and zinc vacancy ensures the high-temperature stability of *** utility of AFZO in enabling the epitaxial growth of(Al_(x)Ga_(1-x))_(2)O_(3)film within a high-temperature,oxygen-rich environment is demonstrated,facilitating the development of a self-powered solar-blind ultraviolet Schottky ***,the high-mobility AFZO transparent electrode enables perovskite solar cells to achieve improved power conversion efficiency by balancing the electron concentration-dependent conductivity and *** findings settle the long-standing controversy surrounding the instability in TCOs and open up exciting prospects for the advancement of optoelectronics.

关键词： aluminum and fluorine co-doped ZnO high temperature Schottky photodiodes solar cells stability mechanism transparent conductive oxides

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Visible light induced oxidative coupling of purines with arenes

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Chinese Chemical Letters 2023年第3期34卷 313-316页

作者： Lamei Liao Dongen Lin Gary Histand Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641China The International School of Advanced Materials School of Material Science and EngineeringSouth China University of TechnologyGuangzhou 510640China

The photocatalyzed synthesis of 9-arylpurines has been developed using 9H-purines and non-activated *** method is highly atom economical using an acridinium photocatalyst induced by visible light under air atmosphere ... 详细信息

关键词： Visible light Photocatalysis Purine derivatives C–N bond formation Additive free

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