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Study of Laser-Triggered Vacuum Switch with a Six-gap Rod

Journal of Physics: Conference Series 2018年第1期1074卷

作者： Zucheng Huang Bin Xiang Yun Zong Xiangwei Cao Xiaopo Mao Zhenghao He Jinjiao Kong Yaodong Zhang State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and Technology) Wuhan Hubei 430074 China Guangzhou Zhiguang Electric Co. Ltd. Guangzhou Guangdong 510000 China State Grid Hubei Electric Power Co. Ltd. Electric Power Research Institute Wuhan Hubei 430077 China Communication Engineering Department Shijiazhuang Information Engineering Vocational College Shijiazhuang Hebei 050035 China China Tobacco Hubei Industrial of Cigarette Material Co. Ltd. Wuhan Hubei 430040 China

In this paper, the triggered polar material structure of the Laser Triggered Vacuum Switch (LTVS) was redesigned and the shape of the main electrode was improved. At last, we know that when the gap length of the LTVS is 12mm and the withstand voltage is 30kV, the LTVS is successfully conducted with 5kV gap voltage and 10mJ laser whose wavelength is 1064nm. Meanwhile, jitter time of the switch is approximately 2ns and the conduction time is approximately 20ns. By comparing the gap voltage, capacitance value, laser power and laser wavelength, the implications of such improvements on the jitter time and conduction time of the switch are discussed.

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Influence of oxygen content on hardness of Cr(N,O) thin films deposited by an RF sputtering method

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IOP Conference Series: Materials Science and engineering 2011年第1期20卷

作者： J Shirahata T Ohori H Asami T Suzuki T Nakayama H Suematsu S W Lee Z Fu K Niihara Extreme Energy-Density Research Institute Nagaoka University of Technology 1603-1 Kamitomioka Nagaoka 940-2188 Japan Department of Mechanical Engineering Tomakomai national college of Technology 433 Nishikioka Tomakomai 059-1275 Japan Department of Environmental Engineering Sun Moon University Chungnam 336-708 Korea State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Cr(N,O) thin films were deposited by radio frequency reactive unbalanced magnetron sputtering on Si(100) or glassy carbon substrates. In this paper, the influence of oxygen content on hardness of Cr(N,O) thin films was investigated. The compositional analysis was carried out by Rutherford backscattering spectroscopy. It was found that these thin films contained up to 44at.% of oxygen. Phases in the samples were determined by X-ray diffraction. Cr(N,O) thin films show only peaks based on CrN. The microstructure was observed by utilizing a transmission electron microscope. At <1at.% of oxygen, crystallite size was approximately 100nm. Then, in accordance with increasing of oxygen content, crystallite size was decreased. The hardness of thin films was measured by using a nanoindenter. The micro hardness was changed with varying the oxygen content and the microstructure such as crystallite size. Thus, it was thought that the hardening on Cr(N,O) thin films was caused by solution hardening and/or Hall-Petch relationship.

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Interfacial Polymetallic Oxides and Hierarchical Porous Core–Shell Fibres for High Energy-Density Electrochemical Supercapacitors

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Angewandte Chemie 2022年第27期134卷

作者： Prof. Guan Wu Ziyang Ma Dr. Xingjiang Wu Xiaolin Zhu Dr. Zengming Man Prof. Wangyang Lu Prof. Jianhong Xu National Engineering Lab for Textile Fiber Materials & Processing Technology School of Materials Science and Engineering Zhejiang Sci-Tech University Hangzhou 310018 P. R. China Zhejiang Provincial Innovation Center of Advanced Textile Technology Shaoxing 312000 P. R. China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Nanjing 210009 P. R. China The State Key Laboratory of Chemical Engineering Department of Chemical Engineering Tsinghua University Beijing 100084 P. R. China

Realizing high energy-density and actual applications of fibre-based electrochemical supercapacitors (FESCs) are pivotal but challenging, as the ability to construct advanced fibres for accelerating charges kinetic diffusion and Faradaic storage remain key bottlenecks. Here, we demonstrate high-performance FESCs based on hetero-structured polymetallic oxides/porous graphene core–sheath fibres, where the large pseudo-active polymetallic oxide (PMO) sheath is uniformly loaded on a hierarchical porous graphene fibre (PGF) core. Due to the abundant micro-/mesoporous pathways, large accessible surface, excellent redox activity and good interface electron conduction, the PMO-PGF possesses high areal capacitance (2959.78 mF cm −2 ) and manageable Faradaic reversibility in a 6 M KOH electrolyte. Furthermore, the PMO-PGF-based solid-state FESCs present high energy-density (187.22 μ Wh cm −2 ), long-life cycles (95.8 % capacitive retention after 20 000 cycles), diverse-powered capabilities and actual energy-supply applications.

关键词： Actual Applications Core–Shell Fibre Architecture Electrochemical Capacitors Polymetallic Oxides Porous Graphene

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Highly Efficient Electrocatalysts for Oxygen Reduction Based on 2D Covalent Organic Polymers Complexed with Non‐precious Metals†

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Angewandte Chemie 2014年第9期126卷

作者： Zhonghua Xiang Yuhua Xue Dapeng Cao Ling Huang Jian‐Feng Chen Liming Dai Centre of Advanced Science and Engineering for Carbon (Case4Carbon) Department of Macromolecular Science and Engineering Case Western Reserve University 10900 Euclid Avenue Cleveland OH 44106 (USA) State Key Lab of Organic–Inorganic Composites Beijing University of Chemical Technology Beijing 100029 (P.R. China)

A class of 2D covalent organic polymers (COPs) incorporating a metal (such as Fe, Co, Mn) with precisely controlled locations of nitrogen heteroatoms and holes were synthesized from various N‐containing metal–organic complexes (for example, metal–porphyrin complexes) by a nickel‐catalyzed Yamamoto reaction. Subsequent carbonization of the metal‐incorporated COPs led to the formation of COP‐derived graphene analogues, which acted as efficient electrocatalysts for oxygen reduction in both alkaline and acid media with a good stability and free from any methanol‐crossover/CO‐poisoning effects.

关键词： Elektrokatalysatoren Graphenanaloga Kovalente organische Polymere Metall‐organische Gerüste Sauerstoffreduktion

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High-Efficiency Perovskite Solar Cells Enabled by Guanylation Reaction for Removing MACl Residual and In-Situ Forming 2D Perovskite

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Angewandte Chemie 2024年第7期137卷

作者： Zhuang Xie Yuwei Duan Minghui Cheng Yong Li Zhike Liu Hongxiang Li Yu Chen Zhigang Zang Shengzhong Liu Qiang Peng College of Materials and Chemistry & Chemical Engineering Chengdu University of Technology Chengdu 610059 P. R. China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P. R. China College of Polymer Science and Engineering Sichuan University Chengdu 610065 P. R. China Key Laboratory of Optoelectronic Technology & Systems Ministry of Education Chongqing University Chongqing 400044 P. R. China School of Chemical Engineering and State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. China

The thermodynamical deprotonation of methylammonium chloride (MACl) has several detrimental influences on the quality of formamidinium (FA + )-based perovskite, which limits both efficiency and stability of inverted perovskite solar cells (IPSCs). Herein, a new additive strategy was developed by introducing methyl carbamimidothioate hydroiodide (MCH) into perovskite precursor, where guanylation reaction occurred between MCH and MACl to form a new intermediate of methyl-substituted guanidine (MSG). MSG could then bond with undercoordinated Pb 2+ to in situ form a two-dimensional (2D) perovskite, which would promote the growth and crystallization of three-dimensional (3D) perovskite with higher crystallinity, lower defect-states density and superior stability. Finally, the MCH-treated IPSC with a small area (0.09 cm 2 ) achieved an impressive power conversation efficiency (PCE) of 26.81 % (certified as 26.02 %), which is one of the highest PCEs reported to date. The large area MCH-treated device (1.00 cm 2 ) also obtained a high PCE of 24.36 %. Moreover, the unencapsulated and MCH-treated device exhibited excellent operational stability, maintaining 91.95 % and 97.06 % of their initial efficiencies after aging in air and a nitrogen-filled atmosphere at 85 °C for 1200 h. The encapsulated MCH-treated devices retained 94.25 % of its initial efficiency after continuously tracking at the maximum power-point for 1200 h in air.

关键词： Inverted perovskite solar cells Guanylation reaction Methylammonium chloride residual Two-dimensional perovskite Growth and crystallization

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Oxygen Reduction: Nitrogen‐Doped Holey Graphitic Carbon from 2D Covalent Organic Polymers for Oxygen Reduction (Adv. Mater. 20/2014)

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advanced Materials 2014年第20期26卷

作者： Zhonghua Xiang Dapeng Cao Ling Huang Jianglan Shui Min Wang Liming Dai State Key Lab of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing 100029 P.R. China Center of Advanced Science and Engineering for Carbon (Case4Carbon) Department of Macromolecular Science and Engineering Case Western Reserve University 10900 Euclid Avenue Cleveland OH 44106 USA

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Multi-Group Polymer Coating on Zn Anode for High Overall Conversion Efficiency Photorechargeable Zinc-Ion Batteries

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Angewandte Chemie 2024年第39期136卷

作者： Ming Chen Xiaojun Guo Xiao Jiang Bita Farhadi Xin Guo Yan Zhu Haoxiang Zhang Shengzhong (Frank) Liu School of Electric Power Civil Engineering and Architecture College of Physics and Electronics Engineering State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi University Taiyuan 030006 China These authors contributed equally Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal

The solar-driven photorechargeable zinc-ion batteries have emerged as a promising power solution for smart electronic devices and equipment. However, the subpar cyclic stability of the Zn anode remains a significant impediment to their practical application. Herein, poly(diethynylbenzene-1,3,5-triimine-2,4,6-trione) (PDPTT) was designed as a functional polymer coating of Zn. Theoretical calculations demonstrate that the PDPTT coating not only significantly homogenizes the electric field distribution on the Zn surface, but also promotes the ion-accessible surface of Zn. With multiple N and C=O groups exhibiting strong adsorption energies, this polymer coating reduces the nucleation overpotential of Zn, alters the diffusion pathway of Zn 2+ at the anode interface, and decreases the corrosion current and hydrogen evolution current. Leveraging these advantages, Zn-PDPTT//Zn-PDPTT exhibits an exceptionally long cycling time (≥4300 h, 1 mA cm −2 ). Zn-PDPTT//AC zinc-ion hybrid capacitors can withstand 50,000 cycles at 5 A/g. Zn-PDPTT//NVO zinc-ion battery exhibits a faster charge storage rate, higher capacity, and excellent cycling stability. Coupling Zn-PDPTT//NVO with high-performance perovskite solar cells results in a 13.12 % overall conversion efficiency for the photorechargeable zinc-ion battery, showcasing significant value in advancing the efficiency and upgrading conversion of renewable energy utilization.

关键词： photorechargeable zinc-ion batteries perovskite solar cells overall conversion efficiency

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Optimal operating conditions and modulation format for 160Gb/s signals in a fiber parametric amplifier used as a slow-light delay line element

Optimal operating conditions and modulation format for 160Gb...

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Optical Fiber Communication - OFC 2007 Collocated National Fiber Optic Engineers Conference (OFC 2007), vol.2

作者： Fangfei Liu Yikai Su Paul L. Voss State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University 800 DongChuan Rd Shanghai 200240 China School of Electrical and Computer Engineering Georgia Institute of Technology 777Atlantic Drive Atlanta GA USA 30332-0250 Georgia Tech Lorraine GT-CNRS UMI2958 2-3 rue Marconi Metz France F-57070

We study optimal operating conditions for 160-Gb/s signals traversing a slow-light delay line based on parametric amplification. Six phase modulated formats are investigated, including CSRZ, PAP-CSRZ, GAP-CSRZ, RZ duo... 详细信息

ISBN: (纸本)1557528306

关键词： Differential phase shift keying Fiber optic amplifiers Modulation Modulation techniques Packet switched networks Phase shift Nonlinear optics (190.0190) Parametric oscillators and amplifiers (190.4970)

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Fluorescence Self‐Reporting Precipitation Polymerization Based on Aggregation‐Induced Emission for Constructing Optical Nanoagents

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Angewandte Chemie 2019年第25期132卷

作者： Guan Wang Liangyu Zhou Pengfei Zhang Engui Zhao Lihua Zhou Dong Chen Jiangman Sun Xinggui Gu Wantai Yang Ben Zhong Tang Beijing Advanced Innovation Center for Soft Matter Science and Engineering College of Materials Science and Engineering State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology North Third Ring Road 15 Chaoyang District Beijing 100029 China Guangdong Key Laboratory of Nanomedicine Shenzhen Engineering Laboratory of Nanomedicine and Nanoformulations CAS Key Lab for Health Informatics Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences 1068 Xueyuan Avenue Shenzhen University Town Shenzhen 518055 P. R. China School of Chemical Engineering and Energy Technology Dongguan University of Technology 1st University Road Songshan Lake District Dongguan 523808 China Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Institute for Advanced Study The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China

Precipitation polymerization is becoming increasingly popular in energy, environment and biomedicine. However, its proficient utilization highly relies on the mechanistic understanding of polymerization process. Now, a fluorescence self‐reporting method based on aggregation‐induced emission (AIE) is used to shed light on the mechanism of precipitation polymerization. The nucleation and growth processes during the copolymerization of a vinyl‐modified AIEgen, styrene, and maleic anhydride can be sensitively monitored in real time. The phase‐separation and dynamic hardening processes can be clearly discerned by tracking fluorescence changes. Moreover, polymeric fluorescent particles (PFPs) with uniform and tunable sizes can be obtained in a self‐stabilized manner. These PFPs exhibit biolabeling and photosensitizing abilities and are used as superior optical nanoagents for photo‐controllable immunotherapy, indicative of their great potential in biomedical applications.

关键词： Aggregationsinduzierte Emission Optische Nanoagenzien Photokontrollierbare Immuntherapie Fällungspolymerisation Fluoreszenz

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Bifunctional Electrocatalysts: Cobalt−Iron Oxide Nanosheets for High‐Efficiency Solar‐Driven CO2−H2O Coupling Electrocatalytic Reactions (Adv. Funct. Mater. 31/2020)

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advanced Functional Materials 2020年第31期30卷

作者： Yuying Mi Yuan Qiu Yifan Liu Xianyin Peng Min Hu Shunzheng Zhao Huanqi Cao Longchao Zhuo Hongyi Li Junqiang Ren Xijun Liu Jun Luo Center for Electron Microscopy Tianjin Key Lab of Advanced Functional Porous Materials Institute for New Energy Materials and Low‐Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology Tianjin 300384 China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province Shenzhen University Shenzhen 518060 China Department of Environmental Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of Display Materials and Photoelectric Devices (Ministry of Education) School of Materials Science and Engineering Tianjin University of Technology Tianjin 300384 China School of Materials Science and Engineering Xi'an University of Technology Xi'an 710048 China Qualification of Products Supervision & Inspection Institute of Technology Xinjiang Uygurs Autonomous Region Urumqi 830011 China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou 730050 China

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