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Electroactive and Self-healing Polyurethane Doped Tin Oxide Interlayers for Efficient Organic Solar Cells

Chinese Journal of Chemistry 2024年第23期42卷 2979-2986页

作者： Xu Wang Jing Tian Zuhao You Le Lei Aokang Ge Yao Liu State Key Laboratory of Chemical Resource Engineering Advanced Innovation Center for Soft Matter Science and EngineeringBeijing Universityof Chemical TechnologyBeijing 100029China

Tin oxide(SnO_(2))has been widely used as an electron transport layer(ETL)in optoelectronic ***,there are numerous surface or bulk defects in SnO_(2),working as charge recombination centers to degrade ***,an electroactive and self-healing polyurethane(PHNN)was designed by integrating conjugated unit-naphthalene diimide(NDI)into a typical polyurethane *** hydrogen bonds andπinteractions in PHNN work as non-covalent interactions to endow this polymer with superior self-healing *** contains lots of aliphatic amine and carbonyl groups,which effectively passivate the defects in SnO_(2).Theπstacking of NDI units will facilitate electron delocalization,endowing PHNN with electrical activity compared with traditional *** SnO_(2)with PHNN can improve the conductivity and reduce the work function of SnO_(2)layer,which is conducive to efficient charge extraction and *** PHNN doped SnO_(2)as ETL for PM6:Y6 and PM6:BTP-eC9 based inverted organic solar cells can achieve a high efficiency of 17.16%and 17.51%,*** containing doped SnO_(2)ETL show significantly improved efficiency and ***,the electroactive polyurethane doped SnO_(2)interlayers show high performance interfacial modification to align energy-levels in solar cell devices,which have promising applications in organic electronics.

关键词： Organic solar cells Self-healing polyurethane Doped tin oxide Interface engineering Electron transport layer Charge extraction and recombination Charge transport Defect passivation

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Design of a 13 Tesla Hybrid Magnet

Design of a 13 Tesla Hybrid Magnet

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2023 IEEE International Conference on Applied Superconductivity and electromagnetic Devices, ASEMD 2023

作者： Yang, Zhixing Ren, Li Duan, Pu Xu, Ying Shi, Jing Huazhong University of Science and Technology The State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9798350301571

The Iron-based superconductors(IBS) have high upper critical field, low anisotropy and strong current carrying capacity, which are expected to be the next-generation high temperature superconductors. This paper describes a 13 Tesla hybrid magnet using YBCO tapes and iron-based tapes. The design approach is aimed at verifying the superiority of Iron-based superconducting tapes using a shorter length of IBS tapes. The support structure is designed to improve the mechanical stability of magnets. Through mechanical analysis, it is verified that the magnet meets the design requirements and the operation stability. © 2023 IEEE.

关键词： hybrid magnet iron-based superconductor magnet design

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Pd/N-doped carbon dots@dendritic mesoporous silica nanospheres:A highly efficient catalyst for the hydrogenation of 4-nitrophenol

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Nano Research 2024年第9期17卷 7967-7974页

作者： Weiruo Liu Yanbin Zhu Jiwei Wang Haisong Feng Yunpu Zhai Wei Li Dongyuan Zhao College of Chemistry Zhengzhou University100 Kexue AvenueZhengzhou 450001China Department of Chemistry Laboratory of Advanced MaterialsShanghai Key Laboratory of Molecular Catalysis and Innovative Materialsand State Key Laboratory of Molecular Engineering of PolymersFudan UniversityShanghai 200433China State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China

Highly dispersed Pd/N-doped carbon dots(Pd/NCDs)were successfully immobilized in the mesoporous channels of amino-functionalized dendritic mesoporous silica nanospheres(NMS).The synthesized Pd/NCDs@NMS catalyst exhibits outstanding performance in the catalytic reduction of 4-nitrophenol(4-NP),achieving a turnover frequency of 1461.8 mol·molPd^(-1)·h^(-1),with the conversion rate remaining above 80%after 11 *** and density functional theory calculations reveal that the NCDs significantly affect the electronic structure of Pd nanoparticles,leading to changes in the energy barriers for the adsorption of 4-NP at the Pd sites and the conversion of 4-NP reaction intermediates,which is a key factor contributing to the catalytic *** study offers a new strategy for synthesizing carbon-dot-modified metal-based catalysts.

关键词： palladium nanoparticles nitrogen-doped carbon dots dendritic mesoporous silica catalytic hydrogenation 4-nitrophenol reduction

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Antioxidant Migration on Dielectric Properties of Long-term Impregnated Insulating Oil 23

Antioxidant Migration on Dielectric Properties of Long-term ...

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23rd International Symposium on High Voltage engineering, ISH 2023

作者： Wang, Yucheng Li, Hua Huang, Ziqin Lin, Fuchang State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science & Technology Wuhan China

ISBN: (纸本)9781839539954

High voltage capacitors are widely used in electrical power systems. For better capability in applications, capacitors are impregnated with insulating oil. Polypropylene in its natural state is inherently unstable and degrades when exposed to oxygen. To avoid oxidation that occurs in the process of film forming, antioxidants are developed and used. In this paper, the polypropylene casts added respectively with antioxidant 1010, 3114, 330 and BHT were long-term impregnated in benzyl toluene oil. Secondly, the frequency domain dielectric spectroscopy method was used to study the dielectric properties of the oil. In addition, the effect of antioxidants on the polarization relaxation process of insulating oil was analyzed. The results indicate that antioxidants and small molecular polypropylene in the amorphous region of the film migrate to the oil during long-term impregnation, resulting in increases in relative dielectric constant Εr, dielectric loss tanδ and dc conductivity σdc, and affect the polarization relaxation process. Among these antioxidants, antioxidant 1010 has the greatest impact on insulating oil, while antioxidant 330 has the least impact. © The Institution of engineering & technology 2023.

关键词： Dielectric losses

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Coexistence behavior of asymmetric attractors in hyperbolic-type memristive Hopfield neural network and its application in image encryption

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Chinese Physics B 2024年第3期33卷 302-315页

作者：李晓霞何倩倩余天意才壮徐桂芝 Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of TechnologyTianjin 300130China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of TechnologyTianjin 300130China School of Life Science & Health Engineering Hebei University of TechnologyTianjin 300130China

The neuron model has been widely employed in neural-morphic computing systems and chaotic *** study aims to develop a novel circuit simulation of a three-neuron Hopfield neural network(HNN)with coupled hyperbolic memristors through the modification of a single coupling connection *** bistable mode of the hyperbolic memristive HNN(mHNN),characterized by the coexistence of asymmetric chaos and periodic attractors,is effectively demonstrated through the utilization of conventional nonlinear analysis *** techniques include bifurcation diagrams,two-parameter maximum Lyapunov exponent plots,local attractor basins,and phase trajectory ***,an encryption technique for color images is devised by leveraging the mHNN model and asymmetric structural *** method demonstrates significant benefits in correlation,information entropy,and resistance to differential attacks,providing strong evidence for its effectiveness in ***,an improved modular circuit design method is employed to create the analog equivalent circuit of the memristive *** correctness of the circuit design is confirmed through Multisim simulations,which align with numerical simulations conducted in Matlab.

关键词： hyperbolic-type memristor Hopfield neural network(HNN) asymmetric attractors image encryption

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Molecular surface functionalization of In_(2)O_(3) to tune interfacial microenvironment for enhanced catalytic performance of CO_(2) electroreduction

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Nano Research 2024年第3期17卷 1242-1250页

作者： Suwen WangQiang GaoCui Xu Shuai Jiang Mengyang Zhang Xianjun Yin Hui-Qing Peng Bin Liu Yu-Fei Song State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Center for Soft Matter Science and EngineeringCollege of ChemistryBeijing University of Chemical TechnologyBeijing 100029China

Indium-based materials(e.g.,In_(2)O_(3))are a class of promising non-noble metal-based catalysts for electroreduction of carbon dioxide(CO_(2)).However,competitive hydrogen reduction reaction(HER)on indium-based catalysts hampers CO_(2) reduction reaction(CO_(2)RR)*** herein tune the interfacial microenvironment of In_(2)O_(3) through chemical graft of alkyl phosphoric acid molecules using a facile solution-processed strategy for the first time,which is distinguished from other researches that tailor intrinsic activity of In_(2)O_(3) *** surface functionalization of alkyl phosphoric acids over In_(2)O_(3) is demonstrated to remarkably boost CO_(2) *** example,octadecylphosphonic acid modified In_(2)O_(3) exhibits Faraday efficiency for H_(2) H_(2) H_(2)(FE)of as low as 6.6%and FEHCOOH of 86.5%at-0.67 V ***,which are far superior to parent In_(2)O_(3) counterparts(FE of 24.0%and FEHCOOH of 63.1%).Moreover,the enhancing effect of alkyl phosphoric acid functionalization is found to be closely related to the length of alkyl *** virtue of comprehensive experimental characterizations and molecular dynamics simulations,it is revealed that the modification of alkyl phosphoric acids significantly alters the interface microenvironment of the electrocatalyst,which changes the electrocatalyst surface from hydrophilic and aerophobic to hydrophobic and *** this case,the water molecules are pushed away and more CO_(2) molecules are trapped,increasing local CO_(2) concentration at In_(2)O_(3) active sites,thus leading to the significantly enhanced CO_(2)RR and suppressed *** work highlights the importance of regulating the interfacial microenvironment of inorganic catalysts by molecular surface functionalization as a means for promoting the electrochemical performance in electrosynthesis and beyond.

关键词： carbon dioxide(CO_(2))electroreduction interfacial microenvironment molecular surface functionalization In_(2)O_(3)catalyst water and CO_(2)diffusion

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A Review on the Control Strategies for Differential Boost Inverter 26

A Review on the Control Strategies for Differential Boost In...

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26th International Conference on Electrical Machines and Systems, ICEMS 2023

作者： Li, Mengyuan Wang, Jin Wang, Hu Dai, Youlun Zhou, Libing Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9798350317589

The differential boost inverter (DBI) has gained a great deal of interest in academia due to its advantages. Compared with conventional cascaded topology composed of a DC-DC boost circuit and a voltage source inverter, DBI needs only one-level topology to achieve boost inverter, thus has higher efficiency and lower cost. The three-phase DBI can be applied to motor drives and grid connection. Based on analyzing the structure and operating principle of three-phase DBI, this paper presents an elaborate and in-depth review of typical control strategies for three-phase DBI, including their basic principles, key features, exiting issues, and relevant suggestions, and finally reports the development tendency of the control strategies. © 2023 IEEE.

关键词： Topology

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Process-microstructure-properties of CuAlNi shape memory alloys fabricated by laser powder bed fusion

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Journal of Materials Science & technology 2023年第21期152卷 1-15页

作者： Yankun Zhang Lianyong Xu Lei Zhao Danyang Lin Minqian Liu Xueyan Qi Yongdian Han School of Materials Science and Engineering Tianjin UniversityTianjin 300350China Tianjin Key Laboratory of Advanced Joining Technology Tianjin 300350China State Key Laboratory of Engines Tianjin UniversityTianjin 300350China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China

Cu-based shape memory alloys(SMAs)show great potential in the application of high temperature,but their performance improvement combining with additive manufacturing is still *** this paper,nearly defect-free(99.7%relative density)CuAlNi SMAs with two types of thermal-induced martensites,18R and 2H,were successfully fabricated by laser powder bed fusion(LPBF).The remelting printing strat-egy with systematic optimization framework including densification and printability analysis was used to get optimal process *** twin-related self-accommodation structure with long period stacking order substructure was formed during additive manufacturing *** as-build samples show excel-lent mechanical properties(ultimate compressive strength of 1593±10 MPa and large fracture strain of 23.0%±0.1%)with double-yielding,and outstanding shape memory effect,with maximum recoverable strain of 3.39% and nearly 100%recovery rate under compressive strain not exceeding 6%.Furthermore,the microstructural evolution in LPBF involving remelting,martensitic transformation,and 2H marten-site was *** result not only builds the microstructure framework involving high reflectivity alloys and martensitic transformation but also provides insight into the applicability of LPBF process in producing Cu-based SMAs.

关键词： Shape memory alloys Cu-based Laser powder bed fusion Martensitic transformation Microstructural evolution

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Modified Nine-Switches High Step-up Ratio Boost-Only Y-inverter with Common Ground 26

Modified Nine-Switches High Step-up Ratio Boost-Only Y-inver...

引用

26th International Conference on Electrical Machines and Systems, ICEMS 2023

作者： Dai, Youlun Wang, Jin Wang, Hu Li, Mengyuan Zhou, Libing Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9798350317589

The article proposes a modified nine-switches high step-up ratio boost-only Y-inverter with common ground. This new inverter inherits the major advantages of the double dual topology and Y-inverter, and the circuit is modified so that both input and output are common-grounded, which ensures high voltage gain in three-phase systems. Meanwhile, the circuit topology reduces three switches, without increasing voltage stress, magnetic volume, or reducing voltage gain. Eventually, a double-loop control scheme in which input current and output voltage are used as control variables is designed here for the proposed Y-inverter. The feasibility is confirmed by Simulink simulation, which has provided a basis for future research. © 2023 IEEE.

关键词： Topology

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An artificial interphase enables stable PVDF-based solid-state Li metal batteries

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Nano Research 2024年第3期17卷 1482-1490页

作者： Mengjun Wu Jiangping Song Jiaheng Lei Haolin Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Chemistry School of ChemistryChemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528200China

Composite polymer electrolytes(CPEs)have attracted much attention for high energy density solid-state lithium-metal batteries owing to their flexibility,low cost,and easy ***,the unstable Li/CPE interface is always challengeable for the practical utilization of ***,a polymer interlayer containing K+prepared by ultraviolet(UV)-curing precursor solution is coated on Li surface to stabilize the interface between poly(vinylidene difluoride)(PVDF)composite electrolytes and Li *** from the physical barrier of the interlayer,the continuous decomposition of PVDF is restrained and the intimate contact between electrode and electrolyte is also achieved to reduce the interface ***,the added K+is utilized to further regulate smooth Li *** a consequence,the symmetric Li|Li cell with coated Li demonstrates steady cycling at 0.4 mAh·cm^(-2) and a high critical current density of 1 mA·cm^(-2).The assembled Li|LiFePO_(4) cell presents outstanding cycling stability(capacity retention of 90%after 400 cycles at 1 C)and good rate *** associated pouch cell performs impressive flexibility and *** work provides a convenient strategy to achieve stable Li/PVDF interface for high-performance PVDF-based solid state Li metal batteries.

关键词： interfacial modification solid-state batteries composite polymer electrolytes interfacial compatibility lithium dendrite

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