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Enhancing output performance of triboelectric nanogenerator by increasing charge storage capacity of electrodes

Nano research 2025年第1期18卷 395-403页

作者： Congcong Hao Zekun wang Mingzhe Cai Shuaining Cheng Zhongxin wang Cong Zhai Juan Cui Yongqiu Zheng Chenyang Xue Key Laboratory of instrumentation Science and Dynamic Measurement Ministry of Education North University of ChinaTaiyuan 030051China

ABSTrACT:The practical application of rotating triboelectric nanogenerators is often limited by the wear of high-friction surface materials and low surface charge *** addition to the charge pump replenishment strategy,suppressing charge decay is also crucial for.increasing surface charge ***,we present a high performance rotary triboelectric nanogenerator(HPr-TENG)based on a coplanar charge pumping strategy and polyvinyl chloride(PVC)*** has been demonstrated that applying PVC film to the surface of the storage electrode of the main TENG(M-TENG)significantly enhances the M-TENG’s output ***,the HPr-TENG with three layers of PVC film pasted achieved the best output performance,with a peak-topeak output voltage of 2828 V,a peak-to-peak output current of 327μA and a charge transfer of 0.81μC at 500 *** addition,the output improvement effects of different materials are *** TENG with 3 layers of PVC film pasted on it has a maximum output power of 748 mW at a load resistance of 4×10^(6)Ω.HPr-TENG’s output performance remains consistent after 100,000 cycles,which shows excellent *** excellent electrical performance of the HPr-TENG can be used as the energy supply for the tip high-voltage breakdown sensor system,which can achieve 14 breakdowns in 10 *** to its extraor.inary electrical performance,HPrTENG can not only serve as an energy supply for cutting-edge high-voltage breakdown sensor systems,but also has the potential to serve as an energy supply for high-pressure sterilization,high-pressure vacuum and water electrolysis.

关键词： triboelectric nanogenerator coplanar charge pump enhancing charge density suppressing charge decay polyvinyl chloride(PVC)film

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Carbon-supported CeNCl as an efficient catalyst for CO_(2)cycloaddition

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Nano research 2025年第1期18卷 157-163页

作者： Li Liu Lingling Zhang Xiang Chu Baokang Geng Huilin wang Zongxiang Li Xiao wang Shuyan Song Hongjie Zhang School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China State Key Laboratory of rare Earth resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Sinocare incorporation Changsha 410221China Department of Chemistry Tsinghua UniversityBeijing 100084China

The cycloaddition reaction of CO_(2)with epoxide not only effectively reduces the concentration of CO_(2)in the atmosphere,but also has excellent industrial application value and up to 100%atom utilization,but there are difficulties in separation and recovery of traditional homogeneous catalysts,harsh reaction conditions of traditional heterogeneous catalysts,and activation of CO_(2)*** this paper,an easily synthesized heterogeneous catalyst CeNCl/C was used to catalyze the cycloaddition reaction of CO_(2)with styrene oxide,with a high yield of 92.7%,a high selectivity of 96.7%,a turnover numbers(TON)value of 349,and a good stability demonstrated in six cycle tests(equivalent to 216 h of testing).Through comprehensive studies,it was shown that CeNCl/C contains Lewis acid-base centers as active centers,which can effectively reduce the energy bar.ier required for ring opening of the reaction substrate,enhance the adsorption and activation of CO_(2),and promote the formation of intermediates,which led to the acquisition of excellent catalytic activity.

关键词： CO_(2)cycloaddition heterogeneous catalysis CeNCl Lewis acid/base

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Hydrogen-bonded organic framework-ionic liquid composite quasisolid electrolyte for high-performance lithium battery

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Nano research 2025年第1期18卷 332-340页

作者： Junmei Zhang Yatao Wu Chenye wang Yong Liu Zhirong Yang Shiyue Zhou Wenpeng Li Wenjia Wu Jingtao wang School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China

ionic liquids(iLs)hold great promise as highperformance electrolyte material due to their unique advantages including nonvolatility,high thermal stability and high ionic ***,the iL-based electrolytes always suffer from serious ion aggregation and high viscosity at low temperatures,leading to significantly decline in ionic ***,hydrogen-bonded organic framework-ionic liquid composite quasi-solid electrolyte(high temperature treatment(HT)-HOF-iL CQSE)was prepared through confining the iL electrolytes(iLEs)into the pore of HOF lamellar *** weak hydrogen bonding interactions within HOF nanosheets,together with the generated interactions between iLE and HOF,enable uniform and continuous distribution of iLE in HOF lamellar *** effectively inhibits the ion migration of iLE,which meanwhile serves as Li+transfer sites,affor.ing high ionic conductivity of 5.7×10^(-5)S·cm-1 at-60 ℃,with high lithium-ion transference number of 0.69,whereas iLEs usually lose ionic conduction ability at such low *** assembled Li symmetrical cell can stably cycle at 0.2 mA·cm^(-2)and^(-2)0 ℃ for more than 1500 *** LiFePO_(4)|HT-HOF-iL CQSE|Li cell shows excellent cycling performance at 0.5 C at a wide temperature range of^(-2)0 to 60 ℃.This work may pave a new avenue for the development of high-performance iL-based composite electrolytes.

关键词： ionic liquid hydrogen-bonded organic framework low-temperature ionic conductivity lithium-ion transference number quasi-solid electrolyte

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A quantum-search-based multi-classifier for.image recognition

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 21-31页

作者： Lu Liu Xingyu Wu Lufan Zhang Chuan wang School of Ar.ificial intelligence Beijing Normal University Applied Optics Beijing Area Major Laboratory Beijing Normal University

The multi-class classification of images is a pivotal challenge within the realm of image processing. As the volume of visual data continues to expand, there is a burgeoning interest in harnessing the unique capabilities of quantum computation to augment the efficiency of classification tasks. However, many existing methods for tr.ining quantum image multi-classifiers parallel classical machine lear.ing techniques, where the requisite circuit measurements increase linearly with the volume of tr.ining data. This work introduces a novel approach for tr.ining a quantum image multi-classifier based on the quantum search algorithm. We have meticulously conducted rigorous experiments on a handwritten digit dataset, a classic benchmark in the field. The results have been meticulously compared with previous works, and the comparative analysis not only validates the efficiency of our proposed approach, requiring only O(N/b) measurements during tr.ining, but also highlights a significant quadratic speedup of the algorithm.

关键词： quantum computation image recognition quantum search algorithm

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in situ prepared Al-Si alloy matrix composites r.inforced by γ-Al_2O_3p

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Journal of Univer.ity of Science and Technology Beijing 2007年第3期14卷 276-279页

作者： lan Jiang Bo Jiang Zhaofei wang Yue wang Ji Liu School of Materials and Metallurgy Northeastern University Shenyang 110004 China School of Environmental and Biological Science ＆ Technology Dalian University of Technology Dalian 116024 China

A γ-Al2O3 par.icles r.inforced Al-Si alloy matrix composite was fabricated by adding NH4Al（SO4）2 to molten aluminum alloy. TEM observation shows that in-situ γ-Al2O3 par.icles are generally spherical and uniformly distributed in the matrix. The results of dry sliding wear tests show that the wear resistance of the composites increases with increasing mass fraction, and the volume loss is considerably lesser than that of the matrix and is lesser than that of the composites by adding γ-Al2O3 par.icles directly.

关键词： aluminum matrix composite in-situ γ-Al2O3 par.icles microstructure wear behavior

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A New Strategy for restr.ining Dynamic Str.in Aging in GH4169 Alloy During Tensile Deformation at High Temperature

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Acta Metallur.ica Sinica(English Letters) 2022年第11期35卷 1895-1902页

作者： Xin-Tong Lian Jin-lan An Lei wang Han Dong School of Materials Scienceand Engineering Shanghai UniversityShanghai 200444China Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process Shenyang Aerospace UniversityShenyang 110136China Key Lab for Anisotropy and Texture of Materials Ministry of EducationNortheastern UniversityShenyang 110819China

The dynamic str.in aging(DSA) behavior was investigated in GH4169 alloy during tensile defor.ing with electric-pulse current(EPC) at 750 ℃.The results show that DSA is restr.ined in the alloy when deformed with 40 *** size ofγ " phase inner gr.ins increases obviously and δ phase is facilitated to precipitate on gr.in boundary in the alloy applied with EPC,due to the promotion effect of EPC on the diffusion and segregation of *** electron microscopy(TEM)results indicate that dislocations can cut through small γ" precipitate with the size of less than 10 nm,while dislocations can only bypass dislocations when γ " precipitate grow up over 20 *** growth of precipitates consumes large amounts of atoms as well as the velocity of dislocation increase,which makes dislocations difficult to be ***,when γ" precipitates grow up to a large size more than the critical size of dislocation pinning,DSA is significantly restr.ined in the alloy after necking deformed with EPC.

关键词： GH4169 alloy Electric-pulse current Dynamic str.in aging Microstructure

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Application of Bionic Technology in Marine Cr.ise Equipment:research Progress and Development Trends

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Journal of Bionic Engineering 2024年第3期21卷 1117-1155页

作者： Kunhui Luo lan Yan Zhiyi Zhu Zhongqiu wang Hongru wang Feng Jiang School of Electromechanical and Automation Huaqiao UniversityXiamen36102China National Local Joint Engineering research Center for.intelligent Manufacturing Technology of Brittle Material Products Xiamen361021China institute of Oceanographic instrumentation Shandong Academy of SciencesQilu University of Technology(Shandong Academy of Sciences)Qingdao266100China Shandong Provincial Key Laboratory of Marine Monitoring instrument Equipment Technology Qingdao266100China National Engineering and Technological research Center of Marine Monitoring Equipment Qingdao266100China institute of Manufacturing Engineering Huaqiao UniversityXiamen361021China

This ar.icle provides an over.iew of the application of bionic technology in marine cr.ising equipment,discussing its research progress and future development *** cr.ising is a crucial means of gaining insights into the marine environment and conducting scientific ***,conventional marine cr.ising equipment faces numerous challenges when dealing with complex and ever-changing marine *** technology,as a means of drawing inspiration from the structure and functions of living organisms,offers new approaches and methods to address the challenges faced by marine cr.ising equipment and has found widespread *** ar.icle primarily focuses on the applications and historical developments of bionic technology in propulsion methods,drag reduction,and surface *** summarizes the design principles,manufacturing techniques,and optimization methods for marine biomimetic cr.ising ***,this paper analyzes the achievements,challenges,and future directions of bionic technology in marine cr.ising *** application of bionic technology in marine cr.ising equipment holds vast potential for development,enabling us to better confront the challenges of marine exploration and research by drawing wisdom from nature and driving advancements in marine science.

关键词： Marine cr.ising equipment Bionic technology Propulsion methods Drag reduction Surface antifouling

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Formation and control of the surface defect in hypo-peritectic steel during continuous casting:A review

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international Journal of Minerals,Metallurgy and Materials 2023年第12期30卷 2281-2296页

作者： Quanhui Li Peng lan Haijie wang Hongzhou Ai Deli Chen Haida wang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China research institute Nanjing Iron and Steel Co.Ltd.Nanjing 210044China School of Metallur.ical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Technology Center Fushun Special Steel Co.Ltd.Fushun 113001China Center of Technology&Quality Jianlong Beiman Special Steel Co.Ltd.Qiqihar 161041China

Hypo-peritectic steels are widely used in various industrial fields because of their high strength,high toughness,high processability,high weldability,and low material ***,surface defects are liable to occur during continuous casting,which includes depression,longitudinal cracks,deep oscillation marks,and severe level fluctuation with slag *** high-efficiency production of hypo-peritectic steels by continuous casting is still a great challenge due to the limited understanding of the mechanism of peritectic *** work reviews the definition and classification of hypo-peritectic steels and introduces the formation tendency of common surface defects related to peritectic *** achievements in the mechanism of peritectic reaction and transformation have been ***,countermeasures to avoiding surface defects of hypo-peritectic steels duiring continuous casting are *** certain points in the continuous casting of hypo-peritectic steels and the development of new techniques to overcome the present problems will be a great aid to researchers.

关键词： hypo-peritectic steel continuous casting surface defect massive transformation gr.in coarsening depression longitudinal crack level fluctuation oscillation mark

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An Energy-Preser.ing Scheme for the Coupled Gross-Pitaevskii Equations

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Advances in Applied Mathematics and Mechanics 2021年第1期13卷 203-231页

作者： lan wang Wenjun Cai Yushunwang Jiangsu Collaborative innovation Center of Biomedical Functional Materials School of Mathematical SciencesNanjing Normal UniversityNanjingJiangsu 210023China School of Mathematics and Statistics Jiangxi Normal UniversityNanchangJiangxi 330022China

An energy-preser.ing scheme is proposed for the coupled Gross-Pitaevskii *** scheme is constructed by high order compact method in the spatial direction and average vector field method in the temporal direction,*** scheme is energy-preser.ing,stable,and of sixth order.in space and of second order.in *** experiments verify the theoretical *** dynamic behavior modeled by the coupled Gross-Pitaevskii equations is also numerically investigated.

关键词： Coupled Gross-Pitaevskii equations average vector field method high order compact method energy-preser.ing scheme

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Green synthesis of multifunctional carbon dots for anti-cancer and anti-fungal applications

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Chinese Journal of Chemical Engineering 2021年第9期34卷 97-104页

作者： Shaojing Zhao Li Huang Yong Xie Bin wang Feng wang Minhuan lan Hunan Provincial Key Laboratory of Micro&Nano Materials interface Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China State Key Laboratory of the Discovery and Development of Novel Pesticide Shenyang Sinochem Agrochemicals R&D Co.Ltd.Shenyang 110021China Key Laboratory of Materials Chemistry for Energy Conver.ion and Storage of Ministry of Education Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Carbon dots(CDs)have become popular nanomaterials in biomedical and agricultural *** we synthesized multifunctional CDs which showed anti-cancer and anti-fungal *** low cytotoxicity,stable fluorescence and high photothermal conver.ion efficiency enable the CDs with imagingguided photothermal *** CDs also exhibited intrinsic anti-fungal activity even at a low concentration,i.e.,40 mg·L^(-1) of CDs induced 20%mortality in cucumber downy ***,the largeπ-conjugated nanostructure and the richness of amino and hydroxyl groups make them a powerful delivery platform for flumorph(a fungicide)with a high loading efficiency of 47.18%.Meanwhile,the heat converted from the light can accelerate the release of flumorph from CDs,and thus efficiently kill fungus.

关键词： Carbon dots Photothermal therapy Anti-fungus Delivery Pesticide

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