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Achieving a high energy storage density in Ag(Nb,Ta)O_(3) antiferroelectric films via nanograin engineering

Journal of Advanced Ceramics 2023年第1期12卷 196-206页

作者： Hongbo CHENG Xiao ZHAI Jun OUYANG Limei ZHENG Nengneng LUO jinpeng liu Hanfei ZHU Yingying WANG Lanxia HAO Kun WANG Institute of Advanced Energy Materials and Chemistry School of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China College of Electronic and Optical Engineering Nanjing University of Posts and TelecommunicationsNanjing 210023China School of Physics Shandong UniversityJinan 250100China Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials School of ResourcesEnvironment and MaterialsCenter on Nanoenergy ResearchSchool of Physical Science and TechnologyGuangxi UniversityNanning 530004China Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China Jinan Cigarette Factory China Tobacco Shandong Industrial Co.Ltd.Jinan 250104China

Due to its lead-free composition and a unique double polarization hysteresis loop with a large maximum polarization(Pmax)and a small remnant polarization(Pr),AgNbO_(3)-based antiferroelectrics(AFEs)have attracted extensive research interest for electric energy storage ***,a low dielectric breakdown field(Eb)limits an energy density and its further *** this work,a highly efficient method was proposed to fabricate high-energy-density Ag(Nb,Ta)O_(3) capacitor films on Si substrates,using a two-step process combining radio frequency(RF)-magnetron sputtering at 450℃and post-deposition rapid thermal annealing(RTA).The RTA process at 700℃led to sufficient crystallization of nanograins in the film,hindering their lateral growth by employing short annealing time of 5 *** obtained Ag(Nb,Ta)O_(3) films showed an average grain size(D)of~14 nm(obtained by Debye-Scherrer formula)and a slender room temperature(RT)polarization-electric field(P-E)loop(Pr≈3.8 mC·cm^(−2) and P_(max)≈38 mC·cm^(−2) under an electric field of~3.3 MV·cm^(−1)),the P-E loop corresponding to a high recoverable energy density(W_(rec))of~46.4 J·cm^(−3) and an energy efficiency(η)of~80.3%.Additionally,by analyzing temperature-dependent dielectric property of the film,a significant downshift of the diffused phase transition temperature(T_(M2-M3))was revealed,which indicated the existence of a stable relaxor-like AFE phase near the *** downshift of the T_(M2-M3) could be attributed to a nanograin size and residual tensile strain of the film,and it led to excellent temperature stability(20-240℃)of the energy storage performance of the *** results indicate that the Ag(Nb,Ta)O_(3) film is a promising candidate for electrical energy storage applications.

关键词： antiferroelectrics(AFE) AgNbO_(3) Ag(Nb Ta)O_(3) energy storage film capacitors nanograin engineering

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339.7 mm斜向器入井测试及坐挂性能可靠性测试

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石油工业技术监督 2024年第9期40卷 57-61页

作者：刘金鹏赵志张文博薛宪波关皓纶刘海军中海油田服务股份有限公司一体化和新能源事业部天津300459

为探究339.7mm(13%")斜向器在套管内坐挂的开启排量及验证坐挂后坐挂性能的可靠性,确保套管开窗作业顺利稳定,进而挖掘中老油田剩余油以实现提高采收率的目的。基于弹簧校核原理及水力学相关原理,对339.7mm斜向器的坐挂原理及抗压抗扭... 详细信息

为探究339.7mm(13%")斜向器在套管内坐挂的开启排量及验证坐挂后坐挂性能的可靠性,确保套管开窗作业顺利稳定,进而挖掘中老油田剩余油以实现提高采收率的目的。基于弹簧校核原理及水力学相关原理,对339.7mm斜向器的坐挂原理及抗压抗扭结构设计进行系统阐释,并开展入井测试及坐挂性能可靠性测试,验证开发斜向器的现场应用性能。试验结果表明,339.7mm斜向器在3m^(3)泥浆排量时测试井内发生坐挂,且坐挂后下压30.39t无位移,扭矩加至40kN·m无位移,坐挂抗压、抗扭性能良好,可靠性较高。

关键词：斜向器入井测试坐挂性能

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Engineered exosome hybrid copper nanoscale antibiotics facilitate simultaneous self-assembly imaging and elimination of intracellular multidrug-resistant superbugs

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Chinese Chemical Letters 2024年第7期35卷 319-324页

作者： Zengchao Guo Weiwei liu Tengfei liu jinpeng Wang Hui Jiang Xiaohui liu Yossi Weizmann Xuemei Wang State Key Laboratory of Digital Medical Engineering School of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210096China Department of Chemistry Ben-Gurion University of the NegevBeer-Sheva 8410501Israel

With the increasing emergence of bacterial infections,especially multidrug-resistant(MDR)bacteria,poses an urgent *** study demonstrated a novel multifunctional nanotheranostics platform developed by the strategic integration of both in-situ bio-assembly imaging and target bacteria *** the introduction of copper ions into bacteria,the Cu^(2+)could spontaneously bio-selfassembled into a multifunctional copper nanoclusters(NCs)which efficiently enhanced epigallocatechin gallate(EGCG)uptake into *** visualizing the bacteria,the developed theranostic nanoplatform exhibited highly efficient disinfection activities with negligible side effects as reflected by higher cell viability and insignificant hemolytic ***,the exosomal formulation of EGCG integrated with Cu^(2+)showed an increased intracellular antibacterial activity,which could eliminate most of the methicillin-resistant Staphylococcus aureus(MRSA)phagocytosed by macrophages,guide macrophages toward M2-like phenotype polarization and alleviate inflammation,without exhibiting obvious cytotoxicity on host *** regimen could be viewed as an effective strategy for the sterilization of intractable bacterial infections.

关键词： In situ self-assembled Exosome Antibacterial agents Bioimaging Intracellular infection

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Tailoring the microstructure of Mg-Al-Sn-RE alloy via friction stir processing and the impact on its electrochemical discharge behaviour as the anode for Mg-air battery

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Journal of Magnesium and Alloys 2024年第4期12卷 1554-1565页

作者： Jingjing liu Hao Hu Tianqi Wu jinpeng Chen Xusheng Yang Naiguang Wang Zhicong Shi School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China Hunan Institute of Metrology and Test Changsha 410014China Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Constructing the magnesium alloy with fine grains,low density of dislocations,and weak crystal orientation is of crucial importance to enhance its comprehensive performance as the anode for Mg-air ***,this unique microstructure can hardly be achieved with conventional plastic deformation such as rolling or ***,we tailor the microstructure of Mg-Al-Sn-RE alloy by using the friction stir processing,which obviously refines the grains without increasing dislocation density or strengthening crystal *** Mg-air battery with the processed Mg-Al-Sn-RE alloy as the anode exhibits higher discharge voltages and capacities than that employing the untreated ***,the impact of friction stir processing on the electrochemical discharge behaviour of Mg-Al-Sn-RE anode and the corresponding mechanism are also analysed according to microstructure characterization and electrochemical response.

关键词： Magnesium anode Electrochemical discharge behaviour Mg-air battery Friction stir processing

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Enhancing Li-S battery performance via functional polymer binders for polysulfide inhibition

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Journal of Energy Chemistry 2024年第10期97卷 228-236,I0005页

作者： jinpeng Jian Qian Chen Hao Sun Rui Li Yaolin Hou Yulong liu Jia liu Haiming Xie Jiefang Zhu Nation&Local United Engineering Laboratory for Power Batteries Faculty of ChemistryNortheast Normal UniversityChangchun 130024JjilinChina Jilin Province Dongchi New Energy Technology Co. Ltd.Changchun 13000oJilinChina Department of Chemistry-Angstrom Laboratory Uppsala UniversitySE-75121Sweden

The commercialization of lithium-sulfur(Li-S)batteries faces several challenges,including poor conductivity,unexpected volume expansion,and continuous sulfur loss from the cathode due to redox *** this study,we introduce a novel polymer via a simple cross-linking between poly(ether-thioureas)(PETU)and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT:PSS)as a bifunctio nal binder for Li-S batteries(devotes as"PPTU").Compared to polyvinylidene fluoride(PVDF),as-prepared PPTU exhibits significantly higher electrical conductivity,facilitating electrochemical ***,PPTU demonstrates effective adsorption of lithium polysulfides,leading to improved cycling stability by suppressing the shuttling *** investigate this behavior by monitoring morphological changes at the cell interface using synchrotron X-ray *** with PPTU binders exhibit remarkable rate performance,desired reversibility,and excellent cycling stability even under stringent bending and twisting *** work represents promising progress in functional polymer binder development for Li-S batteries.

关键词： Li-S batteries Bifunctional binders Electrode conductivity Shuttle effect

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煤焦油加氢装置加热炉混氢流程对比分析

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广东化工 2024年第16期51卷 119-121页

作者：姜小军雷陟贾宁毛光明刘锦鹏折帅帅陕煤集团榆林化学有限责任公司陕西榆林719000

煤焦油加氢装置加热炉混氢流程可以简单分为炉前混氢、炉后混氢与部分炉前混氢流程。通过对三种混氢流程进行多方面对比分析,结合其各自的优缺点,在考虑其事故状态下的安全处理、操作的方便性与可控性、投资成本的实际情况下,在装置设... 详细信息

煤焦油加氢装置加热炉混氢流程可以简单分为炉前混氢、炉后混氢与部分炉前混氢流程。通过对三种混氢流程进行多方面对比分析,结合其各自的优缺点,在考虑其事故状态下的安全处理、操作的方便性与可控性、投资成本的实际情况下,在装置设计阶段灵活且最优化的对加热炉混氢流程进行选择,确保装置建成开工后安稳长满优运行。

关键词：炉前混氢炉后混氢部分炉前混氢对比分析

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Climate transformation to warm-humid and its effect on river runoff in the source region of the Yellow River

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Research in Cold and Arid Regions 2014年第3期6卷 257-265页

作者： YongChao Lan HuiJun Jin ChengFang La Jun Wen Jie Song jinpeng liu Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Institute of the Yellow River Source Yellow River Conservancy Committee

The change characteristics and trends of the regional climate in the source region of the Yellow River, and the response of runoff to climate change, are analyzed based on observational data of air temperature, precipitation, and runoff at 10 main hydrological and weather stations in the region. Our results show that a strong signal of climate shift from warm-dry to warm-humid in the western parts of northwestern China （Xinjiang） and the western Hexi Corridor of Gansu Province occurred in the late 1980s, and a same signal of climate change occurred in the mid-2000s in the source region of the Yellow River located in the eastern part of northwestern China. This climate changeover has led to a rapid increase in rainfall and stream runoff in the latter region. In most of the years since 2004 the average annual precipitation in the source region of the Yellow River has been greater than the long-term average annual value, and after 2007 the runoff measured at all of the hydrologic sections on the main channel of the Yellow River in the source region has also consistently exceeded the long-term average annual because of rainfall increase. It is difficult to determine the prospects of future climate change until additional observations and research are conducted on the rate and temporal and spatial extents of climate change in the region. Nevertheless, we predict that the climate shift from warm-dry to warm-humid in the source region of the Yellow River is very likely to be in the decadal time scale, which means a warming and rainy climate in the source region of the Yellow River will continue in the coming decades.

关键词： global warming source region of Yellow River climate shifting hydrologic section

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Polarization descattering imaging: a solution for nonuniform polarization characteristics of a target surface

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Chinese Optics Letters 2021年第11期19卷 38-43页

作者： Yi Wei Pingli Han Fei liu jinpeng liu Xiaopeng Shao School of Physics and Optoelectronic Engineering Xidian UniversityXi’an 710071China Xi’an Key Laboratory of Computational Imaging Xi’an 710071China Key Laboratory of Optical Engineering Chinese Academy of SciencesChengdu 610209China

This paper presents a polarization descattering imaging method for underwater detection in which the targets have nonuniform polarization characteristics. The core of this method takes the nonuniform distribution of the polarization information of the target-reflected light into account and expands the application field of underwater polarization *** component analysis was used to separate the target light and backscattered light. Theoretical analysis and proof-of-concept experiments were employed to demonstrate the effectiveness of the proposed method in estimating target information. The proposed method showed superiority in accurately estimating the target information compared with other polarization imaging methods.

关键词： polarization imaging clear vision scattering

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Use of a Multiplex RT-PCR Assay for Simultaneous Detection of the North American Genotype Porcine Reproductive and Respiratory Syndrome Virus,Swine Influenza Virus and Japanese Encephalitis Virus

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Agricultural Sciences in China 2010年第7期9卷 1050-1057页

作者： CHEN Hong-ying WEI Zhan-yong ZHANG Hong-ying LüXiao-li ZHENG Lan-lan CUI Bao-an liu jinpeng ZHU Qian-lei WANG Zi-xin College of Animal Husbandry and Veterinary Henan Agricultural UniversityZhengzhou 450002P.R.China

A multiplex reverse transcriptase-polymerase chain reaction(multiplex RT-PCR) assay was developed and subsequently evaluated for its efficacy in the detection of multiple viral infections simultaneously,in *** primers for each of the 3 RNA viruses,North American genotype porcine reproductive and respiratory syndrome virus,Japanese encephalitis virus,and swine influenza virus,were used in the testing *** assay was shown to be highly sensitive because it could detect as little as 10-5 ng of each of the respective amplicons in a single sample containing a composite of all 3 *** assay was also effective in detecting one or more of the same viruses in various combinations in specimens,including lymph nodes,lungs,spleens,and tonsils,collected from clinically ill pigs and in spleen specimens collected from aborted pig *** results from the multiplex RT-PCR were confirmed by virus *** relative efficiency(compared to the efficiency of separate assays for each virus) and apparent sensitivity of the multiplex RT-PCR method show that this method has potential for application in routine molecular diagnostic procedures.

关键词： Japanese encephalitis virus multiplex RT-PCR porcine reproductive and respiratory syndrome virus swine influenza virus

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海洋电火花震源地震数据子波处理技术及应用

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工程地球物理学报 2024年第5期21卷 764-774页

作者：张立霞曾维辉刘金朋张兴岩杜广辉王发坤中海油田服务股份有限公司物探事业部物探研究院广东湛江524075

与海洋地震勘探中传统的气枪震源相比,海洋电火花震源由于其声学特性,在激发过程中会产生多个压力脉冲,同时由于海洋地震勘探中鬼波的干扰,使得电火花震源子波中具有更多的旁瓣,限制了地震子波的带宽,降低了地震数据的分辨率。电火花震... 详细信息

与海洋地震勘探中传统的气枪震源相比,海洋电火花震源由于其声学特性,在激发过程中会产生多个压力脉冲,同时由于海洋地震勘探中鬼波的干扰,使得电火花震源子波中具有更多的旁瓣,限制了地震子波的带宽,降低了地震数据的分辨率。电火花震源子波处理一般使用反褶积,但是反褶积技术单一,不能有效解决电火花震源子波复杂的问题。基于此,介绍了电火花震源子波复杂的原因,使用鬼波压制技术、tau-p域预测反褶积技术、零相位化技术对电火花震源子波进行处理,解决电火花数据子波形态不规则的问题,对鬼波进行了有效压制,恢复了电火花震源的子波频带,获得了宽频地震数据,提高了地震数据的分辨率,丰富了低频信息,提高了同相轴的识别能力。

关键词：海洋电火花震源子波处理

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