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Micropore engineering on hollow nanospheres for ultra-stable sodium-selenium batteries

Journal of Energy Chemistry 2023年第5期80卷 99-109,I0004页

作者： Gongke Wang Yumeng Chen Yu Han Lixue Yang Wenqing Zhao Changrui Chen Zihao Zeng Shuya Lei Shaohui Yuan Peng Ge School of Materials Science and Engineering Henan Engineering Research Center of Design and Recycle for Advanced Electrochemical Energy Storage MaterialsHenan Normal UniversityXinxiang 453007HenanChina Comprehensive Energy Research Center Institute of Science and TechnologyChina Three Gorges CorporationBeijing 100038China School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina

Attracted by high energy density and considerable conductivity of selenium(Se),Na-Se batteries have been deemed promising energy-storage ***,it still suffers from sluggish kinetic behaviors and similar“shuttling effect”to ***,utilizing uniform hollow carbon spheres as precursors,Se-material is effectively loaded through vapor-infiltration *** to the distribution of optimized pores,the content of microspores could be up to~60%(<2 nm),serving important roles for the physical confinement ***,the rich oxygen-containing groups and N-elements could be noted,inducing the evolution of electron-moving *** significantly,assisted by the interfacial C-Se bonds and tiny Se distributions,Se electrodes are activated during *** as cathodes for Na-Se systems,the as-resulted samples display a capacity of 593.9 mA h g^(-1)after 100 cycles at the current density of 0.1 *** after 6000 cycles,the capacity could be still kept at about 225 mA h g^(-1)at 5.0 *** by the detailed kinetic analysis,the designed microspores size induces the increasing redox reaction of nano Se,whilst the surface traits further render the enhancement of pseudo-capacitive ***,after cycling,the product Sex(x<4)in pores serves as the primary active *** this,the work is anticipated to provide an effective strategy for advanced electrodes for Na-Se systems.

关键词： Carbon host Tailoring pores Heteroatom doping Vapor-infltration method Sodium-selenium batteries

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Chemical transformations of n-hexane and cyclohexane under the upper mantle conditions

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Geoscience Frontiers 2021年第2期12卷 1010-1017页

作者： Xin Yang Yapei Li Yajie Wang Haiyan Zheng Kuo Li Ho-kwang Mao Center for High Pressure Science and Technology Advanced Research Beijing100094China

Alkanes are an important part of petroleum,the stability of alkanes under extreme conditions is of great significance to explore the origin of petroleum and the carbon cycle in the deep ***,we performed Raman and infrared(IR)spectroscopy studies of n-hexane and cyclohexane under high pressure up to~42 GPa at room temperature(RT)and high temperature(HT).n-Hexane and cyclohexane undergo several phase transitions at RT around 1.8,8.5,18 GPa and 1.1,2.1,4.6,13,30 GPa,respectively,without any chemical *** using resistive heating combined with diamond anvil cell at pressure up to 20 GPa and temperature up to 1000 K,both n-hexane and cyclohexane decompose to hydrogenated graphitic carbon and n-hexane exhibits higher stability than *** results indicate that hydrocarbons tend to dehydrogenate in the upper mantle,and the extension of carbon chains may lead to the formation of some unsaturated compounds and eventually transfer into graphitic products.

关键词： Alkanes High pressure and high temperature Dehydrogenation Hydrocarbon Upper mantle conditions

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Efficient and stable hybrid perovskite-organic light-emitting diodes with external quantum efficiency exceeding 40 per cent

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Light(science & Applications) 2024年第7期13卷 1364-1371页

作者： Lingmei Kong Yun Luo Qianqian Wu Xiangtian Xiao Yuanzhi Wang Guo Chen Jianhua Zhang Kai Wang Wallace CHChoy Yong-Biao Zhao Hongbo Li Takayuki Chiba Junji Kido Xuyong Yang Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai UniversityShanghai 200072China. Institute of Nanoscience and Applications Department of Electrical and Electronic EngineeringSouthern University of Science and TechnologyShenzhen 518055China. Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina. Department of Physics and Lakeside AR/VR Laboratory International Joint Research Center for Optoelectronic and Engineering ResearchYunnan UniversityKunming 650091China. Experimental Center of Advanced Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China. Graduate School of Organic Materials Science Frontier Center for Organic MaterialsYamagata University4-3-16 JonanYonezawa 992–8510Japan

Light-emitting diodes(LEDs)based on perovskite semiconductor materials with tunable emission wavelength in visible light range as well as narrow linewidth are potential competitors among current light-emitting display technologies,but still suffer from severe instability driven by electric ***,we develop a stable,efficient and highcolor purity hybrid LED with a tandem structure by combining the perovskite LED and the commercial organic LED technologies to accelerate the practical application of *** LED and organic LED with close photoluminescence peak are selected to maximize photon emission without photon reabsorption and to achieve the narrowed emission *** designing an efficient interconnecting layer with p-type interface doping that provides good opto-electric coupling and reduces Joule heating,the resulting green emitting hybrid LED shows a narrow linewidth of around 30 nm,a peak luminance of over 176,000 cd m^(−2),a maximum external quantum efficiency of over 40%,and an operational half-lifetime of over 42,000 h.

关键词： diodes narrow quantum

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Plant Diseases Detection and Classification Using Machine Learning, Deep Learning, Spectroscopy 7th

Plant Diseases Detection and Classification Using Machine Le...

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7th International Conference on Smart Trends in Computing and Communications, SmartCom 2023

作者： Jayswal, Hardikkumar S. Chaudhari, Jitendra P. Department of Information Technology Devang Patel Institute of Advanced Technology and Research Charotar University of Science and Technology Gujarat Anand India Charusat Space Research and Technology Center Charotar University of Science and Technology Gujarat Anand India

ISBN: (纸本)9789819908370

The Agriculture Industry has a momentous role in the development of any country. India facing heavy losses in crop production because of the plant diseases like fungal, bacterial, and viral. Indian farmers are still using traditional techniques for farming and especially the detection of diseases in a plant. Indian farmers are using naked eye observation to check the health of the plant and because of that sometimes wrong detection and classification of diseases cause heavy losses in crop production. It may be prevented using plant disease detection and classification techniques. In this paper, we present the survey and implementation of different plant disease detection and classification approach using machine learning and spectroscopy. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Crops

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Photothermal and pH dual-responsive self-healing coating for smart corrosion protection

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Journal of Materials science & technology 2022年第12期107卷 34-42页

作者： Yao Huang Panjun Wang Weimin Tan Wenkui Hao Lingwei Ma Jinke Wang Tong Liu Fan Zhang Chenhao Ren Wei Liu Dawei Zhang Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China National Engineering Research Center for Coatings CNOOC Changzhou Paint and Coatings Industry Research InstituteChangzhou 213016China State Key Laboratory of Advanced Power Transmission Technology(Global Energy Interconnection Research Institute Co.Ltd. )Beijing 100083China BRI Southeast Asia Network for Corrosion and Protection(MOE) Shunde Graduate School of University of Science and Technology BeijingFoshan 528300China

A novel self-healing coating with photothermal and pH dual-responsive properties has been designed to protect carbon steel against corrosion by loading the stimuli-responsive microcapsules into a shape memory epoxy coating. The sandwich-like microcapsules were based on reduced graphene oxide/mesoporous silica(r GO@MS) assembled with a p H-responsive poly(N,N-dimethylaminoethyl methacrylate)(PDMAEMA) layer, and were loaded with benzotriazole(BTA) inhibitors(abbreviated as rGO@MS-P-BTA). Under near-infrared(NIR) light irradiation, the prominent photothermal effect of rGO could not only elevate the coating temperature to activate the shape memory effect and close the coating scratch, but also facilitate the release of corrosion inhibitors to suppress the corrosion activity. Moreover,the PDMAEMA as a p H-driven “gatekeeper” realized the controlled release of BTA from microcapsules at acid conditions. The surface morphology analysis, electrochemical impedance spectroscopy(EIS), and scanning electrochemical microscopy(SECM) were performed to evaluate the self-healing performance of the composite coatings. The results showed that the combination of NIR light and p H-responsive selfhealing effects endowed the coating with short healing time and prominent healing efficiency.

关键词： Self-healing coatings Corrosion inhibitors Photothermal effects pH-responsive Shape memory polymers

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STUDY ON SPATIAL VARIATION MODEL BASED ON GROUND MOTION SIMULATION USING 3-D HETEROGENEOUS SOIL MODELS

Journal of Structural and Construction Engineering

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Journal of Structural and Construction Engineering 2022年第797期87卷 657-668页

作者： Tokumitsu, Ryoichi Yamamoto, Yu Uchiyama, Yasuo Ohno, Susumu Taisei Advanced Center of Technology Taisei Corporation Japan International Research Institute of Disaster Science Tohoku Univ. Japan

Ground motions could cause spatial variation in phase and amplitude in propagating the heterogeneous subsurface soil, even at adjacent points. It has been pointed out that the spatial variation has the effect of reducing the input motion to the building, as well as the effect of exciting the rotation and twist of the building. In this study, we performed ground motion simulations using 3-D heterogeneous soil models and analyzed the characteristics of the coherence of ground motions at adjacent points. We also suggested the coherence model of ground motions at adjacent points based on the scattering theory. In the ground motion simulation, 3-D heterogeneous soil models were used, varying the heterogeneous parameters such as the correlation distance of the propagation velocity of the ground motion, the coefficient of variation, to analyze the relation of the heterogeneous parameters and the coherence. The response waves were extracted from the surface of the soil models and these response waves were used to evaluate the effect of each heterogenous parameter on the coherence at adjacent points. As a result, it was clarified that the coherence tends to increase as the horizontal correlation distance a1 increases, whereas the coherence tends to decrease as the vertical correlation distance a2 increases. And it was indicated that the coherence decreases as the size of the soil model is increased in the depth direction, but the coherence becomes stable even if the soil model is deepened from a certain depth. Also, the modelling of the coherence evaluation was performed by deriving the correlation of the wave field at adjacent points from the wave equation based on the scattering theory, considering the variation of the propagation velocity. In order to verify the applicability of this coherence evaluation model, we compared the coherence of the evaluation model and the results of ground motion simulation using 3-D heterogeneous soil models. As a result, the coherence from

关键词： Soils

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Constructing inter-diffusive PtCuNi/WO_(3)interface to enhance the catalytic activity and stability in oxygen reduction

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Tungsten 2024年第2期6卷 293-303页

作者： Hao-Zhe Xu Dong Li Ying Chen Pin Fang Xiao-Xing Ke Olga Demidenko Yu-Jing Li Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications Experimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China Scientifi c-Practical Materials Research Centre National Academy of Sciences of Belarus220072 MinskBelarus

Platinum-group-metal-based alloy nanocrystals have been considered as the most effi cient catalysts for oxygen reduction reaction(ORR).However,the poor stability issues limit their further deployment in *** oxide(WO_(3))has received attention due to its intrinsic electrochemical stability and proton absorption/desorption *** this work,we prepared PtCuNi/WO_(3)/C hybrid catalyst with inter-diff usive alloy/WO_(3)interface on *** catalyst exhibits enhanced activity and stability associated with the WO_(3)*** characterization results suggest that the increased activity originates from the complementary proton supply of non-stoichiometric H_(x)WO_(3).Moreover,WO_(3)prevents the particle from dissolution and detachment under vigorous electrochemical *** enhanced stability originates from the electronic interaction established between Pt and *** work provides new strategies to design high-performance ORR catalysts by taking the merits of WO_(3)。

关键词： Tungsten oxide PtCuNi Interface Electronic interaction

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Yi-Gang Xu: the Earth's deep interior holds the key to habitability

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National science Review 2021年第4期8卷 35-38页

作者： Jin Liu Ho-Kwang Mao the Center for High Pressure Science and Technology Advanced Research (HPSTAR) HPSTAR

The deep Earth is the engine of whole Earth systems and plays a key role in surface evolution and geological hazards. Scientists have been deciphering the internal processes that shape our habitable planet, especially since the formulation of plate tectonics theory. To date, how the deep Earth works remains mysterious. At the end of 2020,

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Phase Stability and Hydroxyl Vibration of Brucite Mg(OH)_(2) at High Pressure and High Temperature

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Chinese Physics Letters 2021年第3期38卷 111-115页

作者： Wei-Bin Gui Chao-Shuai Zhao Jin Liu Center for High Pressure Science and Technology Advanced Research(HPSTAR) Beijing 100094China

Brucite Mg(OH)_(2) is an archetypal hydrous mineral and it has attracted a great deal of ***,little is known about the evolution of hydroxyl groups in brucite with respect to subduction *** carried out Raman measurements up to 15.4 GPa and 874 K via an externally heated diamond anvil cell,investigating the stability of brucite under the conditions relevant to subducting *** hydroxyl vibration mode A_(1g)(I) of brucite is weakened under simultaneous high pressure-temperature ***,the presence of carbonated solution can destabilize the hydroxyl groups of brucite at low *** results suggest that brucite releases water when reacting with hydrogen carbonate ion to form magnesite MgCO_(3) in subduction *** implies that the global water cycle is largely coupled with the deep carbon cycle in Earth’s interior.

关键词： hydroxyl cycle implies

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Regulating Li transport in Li-magnesium alloy for dendrite free Li metal anode

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Nano research 2023年第6期16卷 8338-8344页

作者： Jinxi Wang Yadong Ye Hongmin Zhou Wei Zhang Zhaowei Sun Jiawen Zhu Hongchang Jin Huanyu Xie Haoliang Huang Yi Cui Rong Huang Zezhong Li Song Jin Hengxing Ji Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026China Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory for Physical Sciences at the Microscale and Anhui Laboratory of Advanced Photon Science and Technology University of Science and Technology of ChinaHefei 230026China Vacuum Interconnected Nanotech Workstation(NANO-X) Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Suzhou 215123China School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China

Li metal has become a strong candidate for anode due to its high theoretical specific capacity and lowest electrochemical ***,the poor reversibility caused by continuous chemical and electrochemical degradation hinders the practical application of Li ***-solution-based metal alloy phases have been proposed as hosts for regulating the non-dendrite electrodeposition,but the fundamental understanding remains unclear due to the drastically different deposition behaviors of Li on *** we found the difference in the diffusion coefficient of Li atoms on solid-solution-based metal alloy phases(Li-Mg and Li-Ag alloys)was a major contributor to the different deposition *** low Li atom diffusion coefficient of Li-Mg alloy showed a preferential Li accumulation on the upper surface rather than the inward-growth plating of Li atoms into alloy foil in Li-Ag *** the process of secondary recrystallization,we improved the diffusion coefficient of Li atoms in Li-Mg alloy that facilitates the inward transfer rather than surface plating of Li *** this case,the recrystallized Li-Mg alloy underwent a solidsolution phase change in the delithiation-lithiation cycles which yielded a high Coulombic efficiency of 99.3%with a reversible gravimetric capacity of 2,874 mAh·g−1 and superior cycling stability over 5,000 h without dendrite growth.

关键词： Li-Mg alloy solid solution recrystallization lithium metal anode diffusion coefficient

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