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2024 International Conference on Green Energy and Mechatronics engineering, ICGEME 2024

作者： Wang, Fengqian Du, Baoshuai Xu, Li Guan, Minyuan Lou, Ping Tang, Shun Cheng, Shijie Cao, Yuan-Cheng State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China State Grid Shandong Electric Power Research Institute Jinan 250003 China Beijing Institute of Smart Energy Huairou Laboratory Changping District Beijing 102209 China Huzhou Power Supply Company State Grid Zhejiang Electric Power Company Ltd. Huzhou 313000 China

Lithium-ion batteries is an indispensable energy storage device in wind energy and solar energy grid-connected system. Solvent-free electrodes manufacturing processes as a new technology have attracted increasing scientific interest due to their cost reduction, ecological friendliness, and ability to increase electrode density. The coordination between the various components plays a crucial and pivotal role in shaping the physical and electrochemical performance of the electrode. In this research, through rational formulation optimization, it is possible to determine the optimal manufacturing parameters for improving performance, such as cycle stability and energy density. Improving battery performance can accelerate the spread of various applications, including electric vehicles and grid-scale energy storage. Studies have shown that when the conductive agent/binder is 5:2, the cycle stability and specific capacity of the battery is the best, under the condition of 0.5 C, even at a high load of 55.4 mg/cm2, it can still play 153.5 mAh /g specific capacity, and the capacity retention rate after 100 cycles is 82.0%. This will make the application of lithium batteries in wind and solar grid-connected systems more extensive and efficient. © Published under licence by IOP Publishing Ltd.

关键词： Lithium-ion batteries

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Optimization of the lattice function in the planar undulator applied for terahertz FEL oscillators

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Chinese Physics C 2014年第3期38卷 72-77页

作者：杨磊秦斌杨军刘遐龄谭萍胡桐宁 State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology

Since the beta function of the electron beam within the undulator has a great influence on the power gain of the free electron laser（FEL）,optimization of the undulator lattice becomes *** this paper,the transfer matrix of the planar undulator is obtained from differential equations of the electron *** on this,the lattice function of the planar undulator in a terahertz FEL oscillator proposed by Huazhong University of Science and technology（HUST-FEL） is optimized and the expressions of the average beta function are *** accuracy of the optimization result was confirmed well by the numerical *** application range of this analytical method is given as *** last,the emittance growth in the horizontal direction due to the attenuation of the magnetic field is discussed.

关键词： planar undulator beam transport lattice optimization

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Ion-Docking Effect Enabling Rechargeable High-Voltage Magnesium–Iodine/Chlorine Battery

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Angewandte Chemie - International Edition 2025年第0期 e202503209页

作者： Guo, Longyuan Li, Tong Yang, Ting Hu, Zhenglin Wang, Aoxuan Luo, Jiayan Institute of Advanced Energy Materials Fujian Key Laboratory of Electrochemical Energy Storage Materials Fuzhou University Fujian Fuzhou350116 China School of Chemical Engineering and Technology Tianjin University Tianjin300350 China School of Materials Science and Engineering State Key Lab of Metal Matrix Composites Shanghai Jiao Tong University Shanghai200240 China

Rechargeable magnesium (Mg) batteries represent a promising energy storage system by offering low cost and dendrite-less propensity. However, the limited selection of cathode materials, and often with low voltage and capacity, constrain Mg batteries. Herein, by exploiting the ion-docking effect between two halogen species—iodine cations (I+) and chlorine anions (Cl−)—we activate the cathodic activity of halogens and develop a magnesium–iodine/chlorine (Mg-I/Cl) battery prototype with high energy and power density. The ion-docking effect enables I+ and Cl− to mutually balance and disperse their charges, and weakens the coordination strength between Cl− and Mg2+ while enhancing the stability of I+, thus facilitating the multi-electron (2 + 1/3) redox reactions of halogens. We also find the solvation state of iodine species determines the reaction process of the I0/I3−/I− redox couples. The here-developed magnesium–iodine/chlorine battery features an impressively high discharge plateau of up to 3.0 V with a high capacity exceeding 400 mAh g−1, and demonstrates a stable lifespan for 500 cycles, with the ability of ultra-fast charging at 20C and low-temperature cycling under −30 °C. These findings may provide new insights for developing high-energy-density Mg battery systems. © 2025 Wiley-VCH GmbH.

关键词： Redox reactions

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Interaction analysis between induction motor loads and STATCOM in weak grid using induction machine model

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Journal of Modern Power Systems and Clean Energy 2018年第1期6卷 158-167页

作者： Ding WANG Xiaoming YUAN State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology

Static synchronous compensators(STATCOM)can be used as a reactive power compensation for induction motor(IM)loads due to its effective control and good *** voltage control(TVC)in a STATCOM has a great influence on voltage dynamics which is a significant concern in a system with many IM *** paper investigates the interaction between IM loads and TVC in a STATCOM under weak grid conditions from the viewpoint of active and reactive power flow.A corresponding induction machine model is proposed,based on which the interaction mechanism between IM loads and TVC in a STATCOM can be intuitively *** is shown that the negative damping component provided by TVC in a STATCOM can lead to system oscillation *** strength and the inertia constant of the induction machine affect the extent of such ***-domain simulation results of IM loads connected to an infinite system through a long transmission line,with STATCOM compensation implemented in MATlab/Simulink,validate the correctness of the analyses.

关键词： Induction machine Small signal stability Static synchronous compensator(STATCOM) Terminal voltage control Weak grid

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Neural Network Prediction of Disruptions Caused by Locked Modes on J-TEXT Tokamak

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Plasma Science and technology 2013年第11期15卷 1154-1159页

作者：丁永华金雪松陈真真庄革 State Key Laboratory of Advanced Electromagnetic Engineering and Technology College of Electrical and Electronic Engineering Huazhong University of Science and Technology

Prediction of disruptions caused by locked modes using the Back-Propagation （BP） neural network is completed on J-TEXT tokamak. The network, which is based on the BP neural network, uses Mirnov coils and locked mode coils signals as input data, and outputs a signal including information of prediction of locked mode. The rate of successful prediction of locked modes is more than 90%. For intrinsic locked mode disruptions, the network can give a prewarning signal about 1 ms ahead of the locking-time. For the disruption caused by resonant magnetic perturbation （RMPs） locked modes, the network can give a prewarning signal about 10 ms ahead of the locking-time.

关键词： disruption locked mode BP neural network prediction

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Study on Gas Production Characteristics of Thermally Aged Composite Insulator Core Rods Under Vacuum Conditions

Study on Gas Production Characteristics of Thermally Aged Co...

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1st Electrical Artificial Intelligence Conference, EAIC 2024

作者： Xiaogang, Li Dandan, Zhang Ji, Wang Kexin, Shi Zhao, Chen Xiang, Cai Gaoli, Song Zhiyu, Wan Henan Jiuyu EPRI Electric Power Technology Co. Ltd. Zhengzhou 450052 China School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China Key Laboratory of Pulsed Power Technology (Huazhong University of Science and Technology) Ministry of Education Wuhan 430074 China State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology Wuhan 430074 China Disaster Prevention and Reduction Center State Grid Hunan Electric Power Company Limited Changsha 410000 China

ISBN: (纸本)9789819640669

Given the extensive utilization of composite insulators in electricity systems, the unresolved decay-like fragmentation of the composite insulator is of paramount importance in the preservation of the system’s functionality in daily life. The core rod’s gas production during the thermal aging process has been verified, which may result in the silicone rubber sheath deforming and potentially rupturing. This study has created an innovative vacuum thermal aging experiment platform that enables the conduct of thermal aging tests under vacuum conditions, thereby further elucidating the process of gas generation and its consequential impact. In addition, this platform is capable of accurately monitoring and recording the gas pressure value in the heating chamber in real time, as well as gathering the gases generated by the thermal degradation of composite insulator core rods. The experimental results elucidate the characteristics of gas production, with a particular emphasis on the thermal press. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Composite Insulator Core Rod Gas production Thermal Aging

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An Investigation into the Products of Thermally Aged Composite Insulator Core Rods

An Investigation into the Products of Thermally Aged Composi...

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1st Electrical Artificial Intelligence Conference, EAIC 2024

ISBN: (纸本)9789819640669

Chinese regions exhibit a highly uneven distribution of substantial energy re-serves and significant electrical energy loads. The actual situation necessitates the electricity system to depend increasingly significantly on transmission lines, in which composite insulators play a vital role. Historically, conventional fractures have been well treated, but the more recent type of fracture known as decay-like fracture is currently being investigated. In the event of a fracture, mishaps such as transmission line dropping may arise, leading to the termination of power supply and failure to restore it promptly. In order to effectively prevent the occurrence of decay-like fractures, researchers are currently endeavoring to understand the mechanism of this fracture, including its specific initiation point and the process of degradation. Drawing from prior research, heat has been identified as a reliable indicator of fracture occurrence. The objective of this work is to determine the impact of thermal stress by examining products during the process of thermal aging. Experimental trials are conducted at various temperatures for a duration of 5 h. Following testing, samples and products obtained from studies are subjected to additional observation and analysis using Fourier Transform Infrared spectroscopy (FTIR) and Gas Chromatography Mass Spectrometry (GC-MS). This work quantifies the chemical composition of the related gaseous products and compares the FTIR results of samples before and after trials to determine the changes in functional groups. Analytical findings can serve as the foundation for further investigation of the decay-like fracture mechanism, namely the process of fracture intensification. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Composite Insulator Decay-Like Fracture. Thermal Aging

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Machine learning-accelerated discovery of polyimide derivatives for high-temperature electrostatic energy storage

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Energy Storage Materials 2025年 78卷

作者： Wan, Chao-Fan Shen, Zhong-Hui Jiang, Jian-Yong Shen, Jie Shen, Yang Nan, Ce-Wen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices Wuhan University of Technology Wuhan430070 China School of Materials and Microelectronics Wuhan University of Technology Wuhan430070 China Wuzhen Laboratory Tongxiang314500 China Longzhong Laboratory Xiangyang441022 China School of Materials Science and Engineering State Key Lab of New Ceramics and Fine Processing Tsinghua University Beijing 100084 China

Molecular engineering of polyimide (PI) has been an effective method for achieving high-performance polymer dielectrics with both good energy storage capability and enhanced thermal stability. However, the rational design of PI derivatives on demand remains a great challenge due to the complex and nonlinear structure-property relationships. To address this challenge, we developed an integrated framework that combines theoretical calculations, advanced molecular descriptors, and machine learning models to study the effect of molecular structures on five key properties of energy gap (Eg), lowest unoccupied molecular orbital (LUMO), dielectric constant (Dk), fractional free volume (FFV) and glass transition temperature (Tg). By employing Artificial Neural Network (ANN), the framework captured nonlinear dependencies between molecular structures and five properties, achieving the prediction accuracy of R2 > 0.90, far surpassing traditional linear models. Using a multi-objective optimization strategy to screen over 200,000 polyimide derivatives, eight optimal molecules with superior properties (e.g., Eg > 4.0 eV, Tg > 300 °C, and Dk > 3.3) were discovered with great potential for applications in high-temperature electrostatic energy storage. This study provides a robust, data-driven approach for multi-property optimization, bridging theoretical insights with machine learning to accelerate the design of advanced polymer dielectrics. © 2025

关键词： Molecular orbitals

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Shaping of metal–organic framework ZnAtzPO4 for ethylene/ethane adsorption separation

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Separation and Purification technology 2025年 370卷

作者： Qu, Guangren Bo, Yawen Gong, Qihan Li, Yanxi Xu, Hua Lai, Jinbo Ding, Jiayu Liu, Sheng Chi, Kebin Shi, Dejun Li, Rongguan Deng, Chun Cui, Xili Xing, Huabin Fundamental Science & Advanced Technology Lab PetroChina Petrochemical Research Institute Beijing102200 China State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and Environment China University of Petroleum Beijing102249 China College of Chemical and Biological Engineering Zhejiang University Hangzhou310058 China

Metal-organic framework (MOF) ZnAtzPO4 enables precise control of the pore size to achieve C2H4/C2H6 adsorption separation. However, the industrial application of MOF powder faces problems such as pipe clogging and dust pollution, and the key to solving these problems lies in shaping. The shaped material should enhance mechanical stability while maintaining its physicochemical properties. This study aimed to explore the effects of shaping on the physicochemical properties of ZnAtzPO4 using different binders. Hydroxypropyl cellulose (HPC), polyethylene glycol (PEG), sodium alginate (SA), and starch were used as binders, and the shaping body of ZnAtzPO4 was prepared by extrusion shaping in different proportions. A series of characterization experiments such as XRD, BET, XPS, and mechanical strength testing, were carried out, then C2H4 and C2H6 adsorption isotherms were collected, and breakthrough experiments were performed on C2H4/C2H6 (50:50 and 80:20 v/v) gas mixture. The selection of binders and the different proportions have significant impacts on the mechanical strength and adsorption properties of the shaped body, in which the shaped adsorbent with 5 % HPC shows a considerably high mechanical strength of 70.50 N/cm, the ethylene adsorption capacity of that is up to 89 % of the powder, and the breakthrough experiments showed about 80 % adsorption separation time of ethylene/ethane compared to powder, exhibiting the best overall performance. Additionally, the 5 % HPC-shaped extrudate exhibits excellent cyclic stability and maintains crystalline integrity in both acidic and alkaline environments. The comprehensive investigation provides valuable insights into the shaping of MOF materials and helps to promote the practical application of MOFs in gas separation technology. © 2025 Elsevier B.V.

关键词： Pore size

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Effect of Ag addition on the tensile deformation behavior of Bi based alloys at low strain rate

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Journal of Materials Research and technology 2025年 36卷 7870-7880页

作者： Yan Wang Zhe-Feng Xu Hui-Hui Zhang Meng-Ying Zhu Rui-Dong Yang Cai-Li Tian Chang-Zeng Fan Satoshi MotozuKa Kazuhiro Matsugi Jin-Ku Yu State Key Lab of Metastable Materials Science & Technology Yanshan University Qinhuangdao 066004 China Hebei Key Lab for Optimizing Metal Product Technology and Performance Yanshan University Qinhuangdao 066004 China Institute of Energy Resources (Hebei Academy of Sciences) Shijiazhuang 050051 Hebei China Department of Materials Science and Engineering Kyushu Institute of Technology Kitakyushu 8048550 Japan Graduate School of Advanced Sciences of Matter Hiroshima University Higashi-Hiroshima 7398527 Japan

This study examines four types of Bi-xAg alloys (where x = 1.5, 2.5, 5.0, and 7.5 wt%) prepared using a casting method. The effects of Ag addition on the microstructure and properties of the alloys, as well as their deformation behavior at low strain rate (1.0 × 10 −5 s −1 ) were investigated. With the increase of Ag content, the microstructure variation and grain refinement are noticeable, the ultimate tensile strength increases, and the fracture strain first increases and then decreases, resulting in the highest fracture strain of 68.6 % at 5.0 wt% Ag content. The microstructure of Bi-1.5Ag (hypoeutectic alloy) is composed of well-developed dendritic primary Bi phase along with eutectic structure, the microstructure of Bi-2.5Ag (eutectic alloy) is composed of cellular eutectic structure, and the microstructure of Bi-5.0Ag and Bi-7.5Ag (hypereutectic alloy) is composed of primary Ag phase surrounded by a Bi phase and eutectic structure. Except for Bi-2.5Ag alloy, the strain distribution of other alloys is nonuniform. A considerable number of low-angle grain boundaries (LAGBs) appear in the eutectic structure with larger strain. The strain of the primary Bi phase was slight, the Bi twin structure is observed for the first time in Bi-1.5 Ag, which demonstrates excellent uniform plastic deformation capacity. The primary Ag phase causes stress concentration, which has an adverse effect on plastic deformation. The increase of Ag content is not positively correlated with the increase of fracture strain, which is mainly attributable to the size and distribution of primary Ag phase.

关键词： Bi-xAg alloy Low strain rate Deformation behavior

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