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A model cathode for mechanistic study of organosulfide electrochemistry in Li-organosulfide batteries

Journal of Energy Chemistry 2022年第3期31卷 440-447,I0012页

作者： Wei Zhang Fenfen Ma Sibei Guo Xin Chen Ziqi Zeng Qiang Wu Shuping Li Shijie Cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina GuSu Laboratory of Materials Suzhou 215123JiangsuChina Hefei National Laboratory for Physical Sciences at the Microscale School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026AnhuiChina State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

Organosulfides offer new opportunities for high performance lithium-sulfur(Li-S)batteries because of materials abundance,versatile structures and unique ***,their redox kinetics as well as cycling performance need to be further *** redox mediators is a highly effective strategy to address above ***,the underlying mechanism in this chemistry is so far insufficiently ***,phenyl disulfide(Ph S–SPh)and phenyl diselenide(Ph Se–Se Ph)are used as a model system for mechanistic understanding of organosulfide electrochemistry,particularly the rate *** the reaction thermodynamics and charge-discharge process reveals redox of both S–S and C–S bonds,as well as that the coupling between radical exchange and electrochemical redox is the key to enhance the sulfur *** study not only establishes a basic understanding of orgaonsulfide electrochemistry in Li-S batteries,but also points out a general strategy for enhancing the kinetics of sulfur electrodes in electrochemical devices.

关键词： Organosulfide Radical exchange Reaction kinetics Rate acceleration

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Recent developments on corrosion behaviors of Mg alloys with stacking fault or long period stacking ordered structures

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Journal of Magnesium and Alloys 2021年第4期9卷 1124-1148页

作者： Yujin Nie Jianwei Dai Xuan Li Xiaobo Zhang School of Materials Science and Engineering Nanjing Institute of TechnologyNanjing 211167China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing 211167China

Corrosion is one of the most drawbacks which restricts the wide applications of Mg *** the last decade,the corrosion behaviors of Mg alloys with stacking fault(SF)and/or long period stacking ordered(LPSO)structures have obtained increasing ***,the corrosion mechanism of the SF–or LPSO–containing Mg alloys has not been well illustrated and even reverse results have been *** this paper,we have reviewed recent reports on corrosion behaviors of SF–or LPSO–containing Mg alloys to better clarify and understand the significance and ***,some deficiencies are presented and advises are proposed for the development of corrosion resistant Mg alloys with SF or LPSO structures.

关键词： Magnesium alloys Corrosion behavior Stacking fault Long period stacking ordered

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Ultra-fast 3D printing of assembly——free complex optics with sub-nanometer surface quality at mesoscale

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International Journal of Extreme Manufacturing 2023年第3期5卷 585-595页

作者： Shuai Peng Jiawen Xu Dongya Li Jun Ren Meng Zhang Xiaolong Wang Yu Liu School of Mechanical Engineering Jiangnan University214122WuxiPeople’s Republic of China Jiangsu Key Lab of Advanced Food Manufacturing Equipment and Technology Jiangnan University214122 WuxiPeople’s Republic of China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of Sciences730000 LanzhouPeople’s Republic of China

Complex-shaped optical lenses are of great interest in the areas of laser processing,machine vision,and optical ***,the processing of complex optical lenses is usually achieved by precision machining combined with post-grinding or polishing,which is expensive,labor-intensive and difficult in the processing of ultra-complex optical *** manufacturing is an emerging technology that provides significant advantages in producing highly intricate optical ***,the layer-by-layer method employed in such manufacturing processes has resulted in low printing speeds,as well as limitations in surface *** address these challenges,we apply tomographic volumetric printing(TVP)in this work,which can realize the integrated printing of complex structural models without *** coordinating the TVP and the meniscus equilibrium post-curing methods,ultra-fast fabrication of complex-shaped lenses with sub-nanometric roughness has been achieved.A2.5 mm high,outer diameter 9 mm spherical lens with a roughness value of RMS=0.3340 nm is printed at a speed of 3.1×10^(4)mm^(3)h^(-1).As a further demonstration,a complex-shaped fly-eye lens is fabricated without any part *** designed spherical lens is mounted on a smartphone’s camera,and the precise alignments above the circuit board are *** further optimization,this new technology demonstrates the potential for rapid fabrication of ultra-smooth complex optical devices or systems.

关键词： tomographic volumetric printing meniscus equilibrium post-curing methods spherical lens sub-nanometric roughness

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High efficiency and selectivity catalyst for photocatalytic oxidative coupling of methane

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Chinese Journal of Structural Chemistry 2023年第12期42卷 1-2页

作者： Qijun Tang Wenguang Tu Yong Zhou Zhigang Zou School of Science and Engineering The Chinese University of Hong KongShenzhenGuangdong518172PR China Jiangsu Key Laboratory for Nano Technology National Laboratory of Solid State MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresSchool of PhysicsNanjing UniversityNanjing210093PR China

Methane(CH_(4))holds great promise in replacing oil as a building block for chemical commodities[1].However,due to the low-polar nature and high C-H bond energy(439 kJ/mol)of CH_(4),the conversion of CH_(4)by traditional thermocatalysis requires harsh reaction conditions(*** temperature and high pressure)and thus,is energy-consuming[2].To be worse,the production of undesired products like CO_(2)is unavoidable as a result of hydrocarbon combustion reactions[2].

关键词： holds consuming methane

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Surface lattice resonance of circular nano-array integrated on optical fiber tips

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Chinese Physics B 2023年第12期32卷 299-304页

作者：吴坚叶高杰庞修洋阚雪芬陆炎史健俞强殷澄王贤平 College of Advanced Interdisciplinary Studies Nanhu Laser LaboratoryHunan Provincial Key Laboratory of High Energy Laser TechnologyNational University of Defense TechnologyChangsha 410073China College of Internet of Things Engineering Hohai UniversityChangzhou 213022China School of Transportation Engineering Jiangsu Shipping CollegeNantong 226010China Jiangxi Key Laboratory of Photoelectronics and Telecommunication College of Physics and Communication ElectronicsJiangxi Normal UniversityNanchang 330022China i-Lab&Key Laboratory of Nanodevices and Applications&Key Laboratory of Nanophotonic Materials and Devices Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China

As metallic nanoparticles are arranged to form a 2D periodic nano-array,the coupling of the localized surface plasmonic resonance(LSPR)results in the well-known phenomenon of surface lattice resonances(SLRs).We theoretically investigate the SLR effect of the circular nano-array fabricated on the fiber *** difference between the 2D periodic and circular periodic arrays results in different resonant *** both structures,the resonant peaks due to the SLRs shift continuously as the array structures are *** some specific arrangements,the circular nano-array may generate a single sharp resonant peak with extremely high enhancement,which originates from the collective coupling of the whole *** interestingly,the spatial pattern of the vector near-field corresponding to the sharp peak is independent of the polarization state of the incidence,facilitating its excitation and *** finding may be helpful for designing multifunctional all-fiber devices.

关键词： fiber tip lattice resonance metallic nanoparticles vector field

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Design and Evaluation of a Novel Self-Adaptive Ankle Rehabilitation Exoskeleton with Elastic Modules 8

Design and Evaluation of a Novel Self-Adaptive Ankle Rehabil...

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8th IEEE International Conference on advanced robotics and Mechatronics, ICARM 2023

作者： Gao, Meng Chen, Junpeng Li, Mi Dai, Jian S. Southern University of Science and Technology Shenzhen Key Laboratory of Intelligent Robotics and Flexible Manufacturing Systems Shenzhen518055 China Centre for Robotics Research King's College London LondonWC2R 2LS United Kingdom Centre for Advanced Mechanisms and Robotics Tianjin University Key Laboratory of Mechanism Theory and Equipment Design of the Ministry of Education Tianjin300350 China

ISBN: (纸本)9798350300178

This paper proposes a novel ankle rehabilitation exoskeleton based on the research of human gait cycle, aiming to assist patients with neurological injury to recover quickly. The mechanism consists of two frames equipped with ankle joints and toe joint. The lower limbs and musculature system are correlated to propose the model. Incorporating spring modules are provided on the instep, the bottom of toes and either sides of the ankles which cushions lower limbs and reduces energy consumption. Kinematics and stress analysis are conducted to verify the feasibility of the model. Besides, the simulation, which incorporates the elastic elements and springs, is presented. Finally, the modular facilitates could easy integration with other rehabilitation modules for a comprehensive system. Overall, this research provides theoretical and engineering technical support for developing lower limb rehabilitation robots with adaptive stability, diversified movement functions, and human-computer interaction safety and health under different conditions. © 2023 IEEE.

关键词： Stress analysis

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Designing double isolated bands and subgap states in two-dimensional XPS3 (X = Al,Ga,In,Tl) for achieving bi-anti-ambipolar transport

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Physical Review Applied 2024年第6期21卷 064009-064009页

作者： Jialin Yang Chuyao Chen Xuemin Hu Tingting Guo Hengze Qu Zhenhua Wu Li Tao Shengli Zhang MIIT Key Laboratory of Advanced Display Materials and Devices College of Material Science and Engineering School of Material Engineering Key Laboratory of Microelectronics Device and Integrated Technology School of Materials Science and Engineering Jiangsu Key Laboratory of Advanced Metallic Materials Center for 2D Materials and Center for Flexible RF Technology

Anti-ambipolar transistors (AATs) are a promising candidate for multivalued logic devices, which are vital for improving the device density and data-handling capabilities of nanoelectronics. Compared with most AATs with Λ-shaped transport characteristics, the emerging four-logic-state bi-AATs have a stronger capability for exponentially increasing the integration density. Here, we demonstrate an alternative strategy to achieve bi-anti-ambipolar transport by using the intrinsic electronic properties of two-dimensional (2D) materials. In detail, by breaking symmetry in edge-sharing octahedra, 2D XPS3 (X = Al,Ga,In,Tl) materials exhibit isolated band structures with subgap states near the Fermi level. More importantly, this special electronic feature inspires the design of double subgap tunnel field-effect transistors (TFETs) for realizing bi-anti-ambipolar transport. Through quantum transport simulations, we observe M-shaped I-V curves in the 2D InPS3 TFET, verifying the feasibility of the device concept. This work broadens the horizon for the development of bi-anti-ambipolar devices in the forthcoming era of big data.

关键词： Electronic structure Quantum transport 2-dimensional systems Field-effect transistors Semiconductor compounds Density functional calculations Nonequilibrium Green's function

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A review in rational design of graphene toward advanced Li-S batteries

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Nano Research Energy 2023年第2期2卷 114-129页

作者： Haina Ci Zixiong Shi Menglei Wang Yan He Jingyu Sun College of Electromechanical Engineering Qingdao University of Science and TechnologyQingdao 266061China College of Energy Soochow Institute for Energy and Materials Innovations Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006China

For lithium-sulfur(Li-S)batteries,the problems of polysulfides shuttle effect,slow dynamics of sulfur species and growth of lithium dendrite during charge/discharge processes have greatly impeded its practical *** core importance to advance the performances of Li-S batteries lies in the selection and design of novel materials with strong polysulfides adsorption ability and enhanced redox electrocatalytic ***,affording high electrical conductivity,superior carrier mobility,and large surface area,has presented great potentials in improving the performances of Li-S ***,the properties of intrinsic graphene are far enough to achieve the multiple management toward electrochemical catalysis of energy storage *** addition,a general and objective understanding of its role in Li-S systems is still *** this line,we summarize the design routes from three aspects,including defect engineering,dimension adjustment,and heterostructure modulation,to perfect the graphene ***-synthesized graphene materials are explored as multifunctional electrocatalysts targeting high-efficiency and long-lifespan Li-S batteries,based on which the regulating role of graphene is comprehensively *** project provides a perspective on the effective engineering management of graphene materials to boost Li-S chemistry,meanwhile promote the practical application process for graphene materials.

关键词： graphene defect engineering dimension adjustment heterostructure modulation Li-S electrochemistry

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Selective substitution induced anomalous phonon stiffening within quasi-one-dimensional P–P chains in SiP2

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Nano Research 2023年第1期16卷 1107-1114页

作者： Xueting Dai Feng Qin Caiyu Qiu Ling Zhou Junwei Huang Fanghua Cheng Xiangyu Bi Caorong Zhang Zeya Li Ming Tang Shengqiang Wu Xiaoxu Zhao Yangfan Lu Huiyang Gou Hongtao Yuan National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210000China School of Materials Science and Engineering Peking UniversityBeijing 100871China College of Materials Science and Engineering National Engineering Research Center for Magnesium AlloysChongqing UniversityChongqing 400030China Center for High Pressure Science and Technology Advanced Research Beijing 100094China

Light-matter interactions in low-dimensional quantum-confined structures can dominate the optical properties of the materials and lead to optoelectronic *** anisotropic layered silicon diphosphide(SiP2)crystal,the embedded quasi-onedimensional(1D)phosphorus–phosphorus(P–P)chains directly result in an unconventional quasi-1D excitonic state,and a special phonon mode vibrating along the P–P chains,establishing a unique 1D quantum-confined *** SiP2 with the homologous element serves as an effective way to study the properties of these excitons and phonons associated with the quasi-1D P–P chains,as well as the strong interaction between these ***,the experimental observation and the related optical spectral understanding of SiP2 with isoelectronic dopants remain ***,with the photoluminescence and Raman spectroscopy measurements,we demonstrate the redshift of the confined excitonic peak and the stiffening of the phonon vibration mode■of a series of Si(P1−xAsx)2 alloys with increasing arsenic(As)*** anomalous stiffening of■is attributed to the selective substitution of As atoms for P atoms within the P–P chains,which is confirmed via our scanning transmission electron microscopy *** optical spectra evolutions with selective substitution pave a new way to understand the 1D quantum confinement in semiconductors,offering opportunities to explore quasi-1D characteristics in SiP2 and the resulting photonic device application.

关键词： SiP2 quasi-one-dimensional structure Raman photoluminescence phosphide

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Deep Dive into the Underlying Cause of the Carbon Loss and the Associated Chemical Processes in Fatty Acid Hydrodeoxygenation Over Ni@Hβ Catalyst

SSRN

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SSRN 2023年

作者： Zhu, Chaojie Fu, Wenqian Zhang, Lei Meng, Congwei Liu, Changjun Zhang, Yuan Tang, Tiandi Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical Engineering Changzhou University Jiangsu Changzhou213164 China

Identify the underlying cause of carbon loss in fatty acid hydrodeoxygenation (HDO) on acidic catalyst is very important to understand the reaction mechanism and design high efficiency catalyst for biomass conversion Herein, HDO reactions of palmitic acid catalyzed by Ni supported on mesoporous Beta (HBeta-M) zeolites with different acidities were investigated. It was found that a significant carbon loss (47.5%) occurred during the entire reaction process on Ni/HBeta-M catalyst with high acid density. This is because the hexadecyl ether intermediate was formed and trapped in the catalyst porous structure and interacted with strong acidic sites. On the Ni/HBeta-M-0.5 catalyst with medium acid density, carbon loss occurred in the initial reaction stage because hexadecanol was trapped in the porous catalyst. Investigations further demonstrated that the hexadecyl ether intermediate can also be converted to hexadecanol and hexadecane via hydrogenolysis on Brønsted and Ni sites. © 2023, The Authors. All rights reserved.

关键词： Catalysts

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