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Cell architecture designs towards high-energy-density microscale energy storage devices

Nano research Energy 2024年第2期3卷 69-82页

作者： Kwon-Hyung Lee Sang-Young Lee Ulsan Advanced Energy Technology R&D Center Korea Institute of Energy Research(KIER)Ulsan44776Republic of Korea Department of Chemical and Biomolecular Engineering Yonsei UniversitySeoul03722Republic of Korea

The rapid growth of miniaturized electronics has led to an urgent demand for microscale energy storage devices(MESds)to sustainably power the micro electronic ***,most MESds reported to date have suffered from the limited energy densities and shape versatility compared to conventional large-scale counterparts because of the architectural constraints inherent in microfabrication-based cell manufacturing and cell dimension/*** review addresses the cell architecture design for MESds that can achieve both miniaturization and high energy *** provide a comprehensive overview of five types of cell architectures of MESds and their fabrication *** addition,to enable practical applications of MESds,several cell design approaches are presented with the aim of minimizing the inactive parts of the cell and maximizing the performance metrics of ***,we discuss development direction and outlook of MESds with a focus on materials chemistry,energy-dense electrochemical systems,and cell performance normalization,which will help to expand their applications and manufacturing scalability.

关键词： microscale energy storage device cell architecture microfabrication miniaturization high-energy-density

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Polyethylene Oxide-Based Composite Solid Electrolytes for Lithium Batteries:Current Progress,Low-Temperature and High-Voltage Limitations,and Prospects

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Electrochemical Energy reviews 2024年第1期7卷 53-90页

作者： Xin Su Xiao-Pei Xu Zhao-Qi Ji Ji Wu Fei Ma Li-Zhen Fan Advanced Battery Technology Center School of New EnergyHarbin Institute of TechnologyWeihai 264209ShandongChina Advanced Battery Technology Center School of Marine Science and TechnologyHarbin Institute of TechnologyWeihai 264209ShandongChina Advanced Battery Technology Center School of Automotive EngineeringHarbin Institute of TechnologyWeihai 264209ShandongChina R&D Center Shanghai Shanshan Technology Co.Ltd.Shanghai 201209China Department of Chemistry and Biochemistry Georgia Southern UniversityStatesboro GA30460USA Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China

Lithium-ion batteries(LIBs)are considered to be one of the most promising power sources for mobile electronic products,portable power devices and vehicles due to their superior environmental friendliness,excellent energy density,negligible memory effect,good charge/discharge rates,stable cycling life,and efficient electrochemical energy conversion,which distinguish it from other power ***,the flammable and volatile organic solvents in carbonate-containing liquid electrolytes can leach,resulting in thermal runaway and interface reactions,thus significantly limiting its *** use of polymer solid electrolytes is an effective way to solve this safety issues,among which poly(ethylene oxide)(PEO)-based solid polymer electrolytes(SPEs)have attracted much attention because of their stable mechanical properties,ease of fabrication,excellent electrochemical and thermal ***,PEO-SPEs with their low room-temperature ionic conductivity,narrow electrochemical windows,poor interface stability,and uncontrollable growth of lithium dendrites cannot meet the demand for high energy density in future ***,this review firstly describes the ion transport mechanisms and challenges that are crucial for PEO-SPEs,and then provides a comprehensive review of current approaches to address the challenges,including novel and efficient lithium salts,additives,composite electrolytes,stable solid electrolyte interfaces,3-d lithium metals and alloys,cathode protection layers and multi-layer ***,future research directions are proposed for the stable operation of PEO-SPEs at room temperature and high voltage,which is imperative for the commercialization of safe and high energy density LIBs.

关键词： Solid polymer electrolytes Polyethylene oxide Ionic conductivity Electrochemical window Lithium-ions batteries Additives

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Low Switching Frequency Motor drive Using All Switching Patterns Search based direct Torque Control 50

Low Switching Frequency Motor Drive Using All Switching Patt...

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50th Annual Conference of the IEEE Industrial Electronics Society, IECON 2024

作者： Hayashi, Haru Yokokura, Yuki Ohishi, Kiyoshi Kobayashi, Yuto Hiwatari, Tenjiro Satake, Akira Department of Electrical Electronics and Information Engineering Nagaoka University of Technology Nagaoka Japan Advanced Technology R&D Center Mitubishi Electric Corporation Amagasaki Japan

ISBN: (纸本)9781665464543

This paper focuses on voltage-integral-based reference tracking modulation (VIrTM) and direct torque control (dTC), proposing the control strategy that minimizes switching frequency while achieving excellent dynamic performance. In the proposed scheme, the optimal voltage integral trajectory calculated by exhaustively searching all switching patterns in an offline process is applied to the dTC. One of the advantages of the proposed scheme is its superior versatility and robustness, as it does not rely on motor parameters. Secondly, it significantly reduces the switching frequency at all operating points while preserving the dynamic characteristics of dTC. The effectiveness of the proposed scheme has been validated through experiments, demonstrating up to a 28% reduction in switching frequency compared to conventional standard dTC. © 2024 IEEE.

关键词： Switching frequency

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discussion on Instability of Current-controlled Inverter with df/dt-type Virtual Inertia Control

Discussion on Instability of Current-controlled Inverter wit...

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2024 IEEE Energy Conversion Congress and Exposition, ECCE 2024

作者： Ueda, Takumi Sano, Kenichiro Terazono, daisuke Nada, Kaho Institute of Science Tokyo Department of Electrical and Electronic Engineering Tokyo Japan Mitsubishi Electric Advanced Technology R&d Center Hyogo Japan

ISBN: (纸本)9798350376067

This paper focuses on the stability of a current-controlled inverter (GFL type) with df/dt-type virtual inertia control. The authors analyze the dynamic characteristics compared to those of synchronous generators and demonstrate the existence of a second-order delay between the electrical frequency and the rotor's rotational frequency in synchronous generators. Then, this second-order delay is implemented into the df/dt-type virtual inertia control as a second-order low-pass filter (LPF), and the influence of the LPF is investigated by EMT simulation. © 2024 IEEE.

关键词： Synchronous generators

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Cellulose Elementary Fibrils as deagglomerated Binder for High-Mass-Loading Lithium Battery Electrodes

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Nano-Micro Letters 2025年第5期17卷 281-296页

作者： Young-Kuk Hong Jung-Hui Kim Nag-Young Kim Kyeong-Seok Oh Hong-I Kim Seokhyeon ryu Yumi Ko Ji-Young Kim Kwon-Hyung Lee Sang-Young Lee Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-RoSeodaemun-GuSeoul 03722Republic of Korea Advanced Analysis and Data Center Korea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Ulsan Advanced Energy Technology R&D Center Korea Institute of Energy Research(KIER)Ulsan 44776Republic of Korea Department of Battery Engineering Yonsei University50 Yonsei-RoSeodaemun-GuSeoul 03722Republic of Korea

Amidst the ever-growing interest in high-mass-loading Li battery electrodes,a persistent challenge has been the insufficient continuity of their ion/electron conduction ***,we propose cellulose elementary fibrils(CEFs)as a class of deagglomerated binder for high-mass-loading *** from natural wood,CEF represents the most fundamental unit of cellulose with nanoscale *** preparation of the CEFs involves the modulation of intermolecular hydrogen bonding by the treatment with a proton acceptor and a hydrotropic *** elementary deagglomeration of the cellulose fibers increases surface area and anionic charge density,thus promoting uniform dispersion with carbon conductive additives and suppressing interfacial side reactions at ***,a homogeneous redox reaction is achieved throughout the *** resulting CEF-based cathode(overlithiated layered oxide(OLO)is chosen as a benchmark electrode active material)exhibits a high areal-mass-loading(50 mg cm^(-2),equivalent to an areal capacity of 12.5 mAh cm^(-2))and a high specific energy density(445.4 Wh kg–1)of a cell,which far exceeds those of previously reported OLO *** study highlights the viability of the deagglomerated binder in enabling sustainable high-mass-loading electrodes that are difficult to achieve with conventional synthetic polymer binders.

关键词： Cellulose elementary fibrils deagglomeration Electrode binders Lithium batteries High-mass-loading

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Novel Temporary Bonding/debonding System Enabling advanced Packaging Process 22

Novel Temporary Bonding/Debonding System Enabling Advanced P...

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22nd International Conference on Electronics Packaging, ICEP 2023

作者： Miyazawa, Emi Enomoto, Tetsuya Akasu, Yuta Sobue, Shogo Nakamura, Yuki Ogawa, Saeko Kawamori, Takashi Institute for Advanced Integrated Technology Resonac Corporation Packaging Materials Group High Performance Materials Department Electronics R&D Center Electronics Business Headquarters Resonac Corporation Film R&D Group Packaging Materials R&D Department Institute for Advanced Integrated Technology Resonac Corporation Bonding Materials Group High Performance Materials Department

ISBN: (纸本)9784991191152

Novel temporary bonding/debonding system including high heat resistant temporary bonding adhesive and debonding methods with newly developed photonic release by Xe flash light irradiation will be introduced. New temporary bonding adhesive is endurable up to 300 °C and can be easily removed by peeling off after debonding from the support carrier. By adopting the dual layer structure with adhesive layer and metal layer on glass carrier, one-shot Xe flash light irradiation within 5 ms enables debonding cleanly, indicating the increased throughput at debonding step. Process demonstration results of wafer thinning down to 50 μm, fan-out wafer level packaging (FOWLP) will also be shown. © 2023 Japan Institute of Electronics Packaging.

关键词： debonding

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reduction of Carrier Harmonic Iron Loss of Phase-Shift Windings dual Three-Phase Motors by Phase Current-Shift Control 27

Reduction of Carrier Harmonic Iron Loss of Phase-Shift Windi...

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27th International Conference on Electrical Machines and Systems, ICEMS 2024

作者： Miyama, Yoshihiro Akatsu, Kan Mitsubishi Electric Corporation Advanced Technology R&d Center Amagasaki Japan Yokohama National University Department of Faculty of Engineering Yokohama Japan

ISBN: (纸本)9784886864406

A carrier harmonic iron loss reduction technique for the phase-shift windings dual three-phase motors is proposed in this manuscript. By controlling two three-phase current phase-shifts from 30 degrees to -30 degrees, the voltage phase-shift is controlled from 30 degrees to 19 degrees, and the first and third carrier harmonic iron loss is reduced to a 42.9% maximum. Finite element analysis (FEA) confirms that the carrier harmonic current and carrier harmonic iron loss is reduced related to carrier harmonic impedance. © 2024 The Institute of Electrical Engineers of Japan.

关键词： Iron analysis

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Fuzzy Logic Technique based Fault diagnosis for Electrical distribution Network 3

Fuzzy Logic Technique based Fault Diagnosis for Electrical D...

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3rd International Conference for Innovation in technology, INOCON 2024

作者： rana, Saurabh G. Talati, Shefali desai, Manish J. The Maharaja Sayajirao University Faculty of Technology and Engineering Department of Electrical Engineering Vadodara India Electrical Research and Development Association Department of R&d Vadodara India

ISBN: (纸本)9798350381931

The power system needs to operate reliably and efficiently, with the distribution system being a critical component. distribution systems are prone to faults and malfunctions for several reasons. These issues can have a significant impact on the power grid, but their effects can be minimized quickly and accurately through fault diagnostics. Electric utilities face an ongoing challenge in promptly and precisely identifying and locating faults in the distribution system. AI tools can be an efficient method for accurately identifying these faults. There are several possible diagnostic methods, such as fuzzy logic, ANN (artificial neural network), ANFIS (adaptive neuro-fuzzy inference system), support vector machines, genetic algorithms, and matching approaches. Each technique has its own advantages and disadvantages. The paper has employed fuzzy logic for fault detection, identification, and location. This paper includes the study of multiple faults on different buses. Also, the identification and location of multiple faults are included. The simulation and algorithm development have been carried out in MATLAB/Simulink. Thus, fault detection, identification, and location have been done through a fuzzy logic algorithm. © 2024 IEEE.

关键词： Location

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Control Study of Enhanced STATCOM for Supercapacitor Applying Virtual Synchronous Generator Control

Control Study of Enhanced STATCOM for Supercapacitor Applyin...

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2024 IEEE Energy Conversion Congress and Exposition, ECCE 2024

作者： Nada, Kaho Fujii, Toshiyuki Sano, Kenichiro Mitsubishi Electric Corporation Advanced Technology R&d Center Hyogo Japan Institute of Science Tokyo Department of Electrical and Electronic Engineering Tokyo Japan

ISBN: (纸本)9798350376067

The enhanced static synchronous compensator (E-STATCOM), which is equipped with a supercapacitor and can output active power, is attracting attention as a compensator that can both suppress grid voltage fluctuations and maintain short-term frequency during transients. The authors propose a virtual inertia control based on current control-type converters. The method can suppress overcurrent and manage the dC voltage of the converter, which are issues with the typical grid forming control employing voltage control-type converters. The proposed control configuration is based on an established current-controlled STATCOM. However, a virtual synchronous generator control can be achieved simply by adding to the dC voltage reference of the conventional STATCOM control. The simulation results show that it is possible to achieve continuous operation for the three-phase line to ground fault, and STATCOM's active and reactive power outputs are possible to suppress system oscillations after the fault is cleared. © 2024 IEEE.

关键词： Synchronous generators

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New Mechanical Solutions for Isolating Severe Losses in High Temperature Wells

New Mechanical Solutions for Isolating Severe Losses in High...

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2024 International Petroleum technology Conference, IPTC 2024

作者： Zhan, Guodong david Yao, Yang Guo, Huijuan Aljohar, Abdulwahab Drilling Technology Division EXPEC Advanced Research Center Saudi Aramco Saudi Arabia Drilling Mechanical Department CNPC Engineering Technology R&D Company Limited China

ISBN: (纸本)9781959025184

In recent years, with the development of China's oil and gas exploration to deeper layers, the number of deep & ultra-deep wells has been increasing year by year. The casing layer sequence in the well structure design reaches 6-7 layers, which has tended to the design limit, but the handling ability is still insufficient in the face of sudden complex formations. Complications such as severe loss and different pressure systems in the same formation are encountered during drilling, resulting in early casing, which may not achieve the exploration target in the end. The open hole clad technology based on high performance solid expandable tubular is focus on solving difficult problems that weak and complex formation and severe drilling loses which cannot be effectively plugged or controlled. This paper studies the open hole clad technology based on high performance solid expandable tubular in exploration wells by using the methods of indoor test and field trials. The operation principle and technical characteristics of open hole clad technology are introduced in detail. And the test of expansion tubular performance, expansion cone performance and thread sealing strength were carried out to study the expansion tubular operation process. Then aiming at LZ1 exploration well with complications such as severe loss and different pressure systems in the same formation are encountered during drilling, the open hole clad technology field experiment was carried out, and the clad effect of expansion tubular were analyzed. The research results showed that: (1) the indoor tests of expansion tubular performance, expansion tubular cone performance and thread sealing strength verified the reliability of expandable tubular open hole clad technology which can effectively deal with the severe drilling loses on the safe drilling in exploration wells. (2) LZ-1 exploration wells have successfully created conditions for safe drilling in the target formation of LMX group by using Φ219mm expanda

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