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Construction of MnS/MoS_(2) heterostructure on two-dimensional MoS_(2) surface to regulate the reaction pathways for high-performance Li-O_(2) batteries

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Journal of Energy Chemistry 2024年第6期93卷 443-452,I0012页

作者： Guoliang Zhang Han Yu Xia Li Xiuqi Zhang Chuanxin Hou Shuhui Sun Yong Du Zhanhu Guo Feng Dang key lab.ratory for Liquid-Solid Structure Evolution and.Processing of mat.rials(Ministry of Education) Shandong UniversityJinan 250061ShandongChina School of Environmental and mat.rial Engineering Yantai UniversityYantai 264005ShandongChina Institute National de la Recherche Scientifique CentreÉnergie Matériaux et TélécommunicationsVarennesQuébec J31S2Canada state key lab.ratory of Powder Metallurgy Central South UniversityChangsha 410083HunanChina Integrated Composites lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon TyneNE18STUK

The inherent catalytic anisotropy of two-dimensional(2D) mat.rials has limited the enhancement of LiO_(2) batteries(LOBs) performance due to the significantly different adsorption energies on 2D and edge *** the adsorption strength in 2D mat.rials to the reaction intermediates is essential for achieving high-performance ***,a MnS/MoS_(2) heterostructure is designed as a cathode catalyst by adjusting the adsorption behavior at the *** from the toroidal-like discharge products on the MoS_(2) cathode,the MnS/MoS_(2) surface displays an improved adsorption energy to reaction species,thereby promoting the growth of the film-like discharge *** can disturb the layer growth of MoS_(2),in which the stack edge plane features.a strong interaction with the intermediates and limits the growth of the discharge *** and theoretical res.lts confirm that the MnS/MoS_(2) heterostructure possesses improved electron transfer kinetics at the interface and plays an important role in the adsorption process for reaction species,which finally affects the morphology of Li_2O_(2),In consequence,the MnS/MoS_(2) heterostructure exhibits a high specific capacity of 11696.0 mA h g^(-1) and good cycle stability over 1800 h with a fixed specific capacity of 600 mA h g^(-1) at current density of100 mA g^(-1) This work provides a novel interfacial engineering strategy to enhance the performance of LOBs by tuning the adsorption properties of 2D mat.rials.

关键词： Li-O_(2)batteries Two-dimensional mat.rials MnS/MoS_(2)heterostructure Edge plane Adsorption behavior

Flexural and Impact res.stance of FRC/Bamboo Laminate

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Journal of mat.rials Science & Technology 2002年第4期18卷 369-371页

作者： Wu YAOstate key lab.ratory of concrete mat.rials res.arch, Tongji University, Shanghai 200092, China lab. of concrete mat. res. Tongji Univ. Shanghai 200092 China

The flexural and impact res.stance of a newly developed FRC/bamboo laminate have been investigated. The laminate considered in this study was combined with reformed bamboo plate and extruded fiber reinforced cementitious (FRC) sheet. Innovated from the raw bamboo, reformed bamboo showed high tensile strength and high strength to weight ratio. It can not only remarkably strengthen the FRC sheet but also reduce the total weight of the laminate. Flexural and impact load, broken energy, deflection and duration were measured. Test res.lts showed that the flexural strength value for the laminate can be improved to greater than 90 MPa, while the impact res.stance is increased more than 10 times for the laminate when compared with the FRC sheet only.

关键词： Flexural strength Impact FRC/bamboo composite

Smart Behavior of Carbon Fiber Reinforced Cement-based Composite

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Journal of mat.rials Science & Technology 2003年第3期19卷 239-242页

作者： Wu YAO, Bing CHEN Keru WUstate key lab.ratory of concrete mat.rials res.arch, Tongji University, Shanghai 200092, China lab. of concrete mat. res. Tongji Univ. Shanghai 200092 China

The electrical characteristics of cement-based mat.rial can be remarkably improved by the addition of short carbon fibers. Carbon fiber reinforced cement composite (CFRC) is an intrinsically smart mat.rial that can sense not only the stres. and strain, but also the temperature. In this paper, variations of electrical res.stivity with external applied load, and relation of thermoelectric force and temperature were investigated. Test res.lts indicated that the electrical signal is related to the increase in the mat.rial volume res.stivity during crack generation or propagation and the decrease in the res.stivity during crack closure. Moreover, it was found that the fiber addition increased the linearity and reversibility of the Seebeck effect in the cement-based mat.rials. The change of electrical characteristics reflects large amount of informat.on of inner damage and temperature differential of composite, which can be used for stres.-strain or thermal self-monitoring by embedding it in the concrete structures.

关键词： Carbon fiber Cement-based composite Smart mat.rial Seebeck effect

调控三芴酮基共价有机框架中的局域极化促进光催化析氢活性

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Science China mat.rials 2024年第2期67卷 504-513页

作者：郝磊沈荣晨秦朝超李能胡浩斌梁桂杰李鑫 Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642China Henan key lab.ratory of Infrared mat.rials and Spectrum Measures.and Applications School of PhysicsHenan Normal UniversityXinxiang 453007China state key lab.ratory of Silicate mat.rials for Architectures Wuhan University of TechnologyWuhan 430070China key lab.ratory of Efficient Utilization of Oil and Gas res.urces in Longdong College of Petroleum and Chemical EngineeringLongdong UniversityQingyang 745000China Hubei key lab.Low Dimens Optoelect mat.Devices Hubei University of Arts and ScienceXiangyang 441053China

局部电荷的强离域和强偶极矩是影响共价有机框架(COFs)基光催化剂催化析氢性能的两个关键因素.然而,基于精确的调控结构模型来系统研究这种构效关系的报告相对较少.本研究提出了一种新的策略,通过合理的设计,制备了三种三芴酮基COFs,通... 详细信息

局部电荷的强离域和强偶极矩是影响共价有机框架(COFs)基光催化剂催化析氢性能的两个关键因素.然而,基于精确的调控结构模型来系统研究这种构效关系的报告相对较少.本研究提出了一种新的策略,通过合理的设计,制备了三种三芴酮基COFs,通过在分子水平上调控单体的结构和偶极来提高局部电荷离域指数.我们重点研究这三种三芴酮基COF的局部电荷离域与光催化性能之间的构效关系.在不同三芴酮基COF中,1,3,5-三(对甲酰基苯基)苯基COF(TeTpb-COF)展现出21.6 mmol g^(-1)h^(-1)的最高析氢速率,与2,4,6-三(4-醛基苯基)-1,3,5-三嗪基COF(TeTt-COF,0.2mmol g^(-1)h^(-1))相比,光催化析氢性能提高了108倍.这种性能的增强可归因于其强大的分子内置电场提高了供体-受体嵌段单元中光生电荷的有效分离效率.这项工作证实了调整构建块可以极大增强三芴酮基COFs中的局部偶极矩,从而显著改善光催化析氢性能.构建模块的调控策略为创建高效的新型COF基光催化析氢平台提供了新机会.

关键词： covalent organic frameworks photocatalytic hydrogen evolution truxenone dipole moment local charge delocalization

Influence of Inclusion Shape on Thermoelasto-Plastic Optimun Design of Ceramic Metal Functionally Graded mat.rials

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Journal of Wuhan University of Technology(mat.rials Science) 2001年第1期16卷 19-24,29页

作者：王继辉 state key lab. mat. Synthesis/Proc. Wuhan University of Technology Wuhan 430070 China

A nonlinear finite element method is applied to observe how inclusion shape influence the thermal res.onse of a ceramic-metal functionally graded mat.rial (FGM). The elastic and plastic behaviors of the layers which are two-phase isotropic composites consisting of randomly oriented elastic spheroidal Inclusions and a ductile mat.ix are predicted by cc mean field method. The prediction res.lts show that inclusion shape has remarkable influence on the overall behavior of the composite. The consequences of the thermal res.onse analysis of the FGM are that the res.onse is dependent on inclusion shape and its composition profile cooperatively and that the plastic behavior of each layer should be taken into account in optimum design of a ceramic-metal FGM.

关键词： inclusion shape ceramic-metal functionally graded mat.rial mean field method elastoplastic behavior

INFLUENCE OF TEMPERATURE-DEPENDENT PROPERTIES ON THERMAL STres.ES res.ONSE AND OPTIMUM DESIGN OF C/M FGMS UNDER THERMAL CYCLIC LOADING

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Journal of Wuhan University of Technology(mat.rials Science) 1997年第4期12卷 7-13页

作者：翟鹏程 state key lab. mat. Synthesis Proc. Wuhan University of Technology Wuhan 430070 China

The influence of temperature-dependent properties on thermal stres.es res.onse and optimum design of newly developed ceramic-metal functionally graded mat.rials under cyclic thermal loaning and high temperature gradient environment is studied. The thermal conductivity of mat.rial is considered to be dependent on the temperature. In this paper, the thermal stres.es res.onse of the mat.rial is calculated rising a nonlinear finite element method. Emphasis is placed on the influence of temperature-dependent properties on the thermal stres.es res.onse characteristics, the thermal stres.es relaxation property and the thermal stres.es history under the different graded compositional distributions and different heat flux magnitudes. Through tile analysis. it is suggested that the influence of temperature-dependent properties can not be neglected In the thermal stres.es res.onse analysis and the optimum design process of the mat.rial must be based on the temperature-dependent thermo-elastic-plastic theory.

关键词： functionally graded mat.rials temperature-dependent properties cyclic thermal loading thermal stres.es res.onse

Multilayer Film Fabrication and Photoelectric Conversion Property of Two Pyrrolidinofullerene Carboxylic Acid Derivatives

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Chinese Chemical Letters 2000年第2期11卷 161-164页

作者： Tian Xin WEI Jin ZHAI Liang Bing GAN Chun Hui HUANG (state key lab.ratory of Rare Earth mat.rials Chemistry and Applications, PKU-HKU Joint lab.ratory on Rare Earth mat.rials and Bioinorganic Chemistry Peking University, Beijing 100871) state key lab. Rare Earth mat. C. PKU-HKU Jt. Lab. Rare Earth Mat. B. Peking University Beijing 100871 China

Two multilayer films of pyrrolidinofullerene carboxylic acid derivatives, which exhibit photoelectric conversion property, are reported here. The first monolayers were fabricated on hydrophilic indium-tin-oxide (ITO), quartz, and mica by esterification reaction. The multilayers were characterized by contact angle and UV spectrum. The photoelectric conversion properties of both multilayer films were studied.

关键词： self-assembled multilayer film fullerene derivative photoelectric conversion

Relationship between Ballistic Coefficient and Static Mechanical Properties for Armor mat.rials

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Journal of University of Science and Technology Beijing 2001年第1期8卷 53-54页

作者： Junpin Lin, Yong Zhang, Zhi Lin, Guoliang Chen The state key lab.ratory for Advanced Metal mat.rials, University of Science and Technology Beijing, Beijing 100083, China state key lab. Advanced Metal mat. Univ. of Sci. and Technology Beijing Beijing 100083 China

The relationship between the ballistic coefficient and the static mechanical properties of armor mat.rials was studied. The res.lts show that the ballistic coefficient is determined by the strength, hardness and the toughness of mat.rials. According to the Martel rule, the equation of the relationship between ballistic coefficient and static mechanical properties satisfies the following formula: W-s=M(1+NK1C/rho )Hr. From the mixture law of composite, the prerequisite, for which ballistic coefficient has maximum to reinforcement volume fraction, is obtained by the following equation: dWs/Df=b(K(1)rho (0)-K(0)rho (1))H/rho (2)+(a+bK/rho)(H-1-H-0).

关键词： armor mat.rials ballistic coefficient toughness

A New Self-Assembled Monolayer of Fullerene Derivative and ItsPhotoelectric Conversion Property

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Chinese Chemical Letters 1999年第5期10卷 421-424页

作者： Jin ZHAI Tian Xin WEI Jun Hao GE Liang Bing GAN Chun Hui HUANG(state key lab.ratory of Rare Earth mat.rials Chemistry and Applications. Peking University.Beijng 100871) state key lab. Rare Earth mat. C. Peking University Beijing 100871 China

A new self-assembled monolayer (SAM) of fullerene derivative has been fabricated and their photoelectric conversion property has been observed. The SAM was fabricated on indium-tin-oxide (ITO) and quartz by amide bonding. It was characterized bq contact angle, UV spectrum. and cyclic voltammetry. The mild fabrication conditions and the stability of the SAM provides a way to build three-dimensional structure more easily.

关键词： self-assembled monolayer C-60 derivatives photoelectric conversion