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design of Edge-Modified hard carbon frameworks with embedded silicon as a high-performance anode for Lithium-Ion batteries

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Journal of Industrial and Engineering Chemistry 2025年 148卷 532-540页

作者： Jang, Hangeol Park, Sang-Hoon Kang, dongWoo Lee, Seungmin Li, Oi Lun Han, Yu-Jin Ulsan Advanced Energy Technology R&D Center Korea Institute of Energy Research Ulsan44776 Cuba School of Materials Science and Engineering Pusan National University Busan46241 Cuba

Si-embedded hard-carbon composites (Si-EHCs) were synthesized as anode materials for high-energy–density lithium-ion batteries. Edge-modified hard carbon (EHC), derived by treating mangrove wood with heat and acid, was combined with Si using a mechanical coating method to form a robust Si-EHC composite structure. This design effectively mitigates the problematic volume expansion Si anodes undergo during cycling and enhances their electrochemical performance by increasing their capacity, charge/discharge rates, and long-term cycling stability. The integration of Si into a hard carbon matrix capable of fast charging/discharging, combined with the optimized carbon coating, offers a promising strategy for addressing key challenges induced by the volume expansion of Si, such as the formation of an unstable solid electrolyte interphase layer. This study highlights the importance of optimizing the design of the composite structure and offers valuable insights for developing high-performance Si/carbon composites with the potential for incorporation into various applications. © 2025 The Author(s)

关键词： Electrolytes

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data Model Using Graph dB to Integrate data from Multi-Field Sources for Service Utilization

Data Model Using Graph DB to Integrate Data from Multi-Field...

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2023 IEEE International Conference on Industrial Engineering and Engineering Management, IEEM 2023

作者： Shimada, Junya Advanced Technology R&d Center Mitsubishi Electric Corporation Amagasaki Japan

ISBN: (纸本)9798350323153

To achieve digital Transformation, companies are required to create new value and deploy solutions by using multi-field data, not just data from one domain. In recent years, data sharing platforms such as FIWArE and GAIA-X are being developed to integrate and manage multi-field data stored in various locations. However, while these platforms provide everything from data storage to data provision, we need to implement data-to-data association and data linkage processing through programming for building services after extracting data from these platforms. Therefore, in this paper, focusing on building services and applications, we propose a data model that can define data-to-data association and linkage processing. The proposed model can be stored and managed by Graph database, allowing retrieval and extraction of data across multiple fields. We also developed an application that lists related data on a map using the proposed model. © 2023 IEEE.

关键词： data Model Graph database Meta Model Multi-Field data Sources

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Study on decreasing the rotor Eddy Current Loss of Surface Permanent-Magnet Motors with Copper Sleeves

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IEEJ Transactions on Industry Applications 2023年第11期143卷 709-718页

作者： Mizuta, Takahiro Ito, Kazumasa Tanaka, Toshinori Mitsubishi Electric Corporation Advanced Technology R&D Center 8-1-1 Tsukaguchi-Honmachi Amagasaki Hyogo661-8661 Japan

In high-speed surface permanent-magnet motors, eddy current loss in the rotor caused by magnetic flux harmonics is a significant problem. Although copper sleeves can reduce the eddy current loss of the rotor, the reduction effect on each eddy current harmonic component is not clear. In this paper, we calculate the eddy current loss in the rotor using finite element analysis, divide the losses into each harmonic magnetic flux component, and analyze the influence of copper sleeve on each harmonic component. Based on the knowledge obtained in the analysis, we propose the use of copper sleeve with holes as a method for reducing rotor loss further. The effect of the proposed method is verified using electromagnetic simulation. © 2023 The Institute of Electrical Engineers of Japan.

关键词： Copper

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An Estimation Method of Photovoltaics Power Output Utilizing Integral Power Consumption and Solar radiation Intensity

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and Systems 2023年第2期143卷 117-124页

作者： Yasunami, Kazuhiro Advanced Technology R&D Center Mitsubishi Electric Corporation 8-1-1 Tsukaguchi-Honmachi Hyogo Amagasaki661-8661 Japan

There is a growing need to use photovoltaic (PV) technology to mitigate global warming and the depletion of fossil fuels while also enhancing energy security. However, the high network penetration of PVs has various negative effects on electrical power systems. In recent years, automated operating systems have been introduced to enable rapid and automatic restoration after a power outage. However, PVs shut down in the case of a power outage and are not automatically restored. Therefore, it is necessary to compensate the electric power output of the PVs by using an extra power supply at the time of power recovery. For this compensation process, it is necessary for a system operator to monitor the unmeasurable power output of the PVs, including those belonging to other organizations and individuals, to ensure that the automated operating system is used properly. Based on these aspects, in this paper, we proposed an estimation method of PVs power output utilizing integral power consumption data obtained from smart meters and solar radiation intensity, and demonstrated the accuracy of the proposed method using measured data. © 2023 The Institute of Electrical Engineers of Japan.

关键词： Energy security

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robustness Analysis of Temperature-Sensitive Electrical Parameters of IGBTs

Robustness Analysis of Temperature-Sensitive Electrical Para...

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2024 International Exhibition and Conference for Power Electronics, Intelligent Motion, renewable Energy and Energy Management, PCIM Europe 2024

作者： Schmitz, Laurids Kojima, Tetsuya de doncker, rik W. RWTH Aachen University Germany Advanced Technology R&D Center Mitsubishi Electric Corporation Hyogo Japan

ISBN: (纸本)9783800762620

Temperature-sensitive electrical parameters (TSEPs) are a promising quantity for online high-bandwidth junction temperature measurements. Besides their sensitivity to temperature, these parameters are also susceptible to parasitic influences, such as dc-link voltage, load current, gate supply voltages, making their application challenging. Thus far, this has only been examined in a limited scope for individual parameters. Based on double-pulse measurements, this paper aims to evaluate and compare multiple TSEPs with regard to their robustness in the presence of such parasitic influences. © VdE VErLAG GMBH · Berlin · Offenbach.

关键词： Insulated gate bipolar transistors (IGBT)

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Secure Sharing Method of Big data Based on ECC Encryption Algorithm and Casual Transmission 3

Secure Sharing Method of Big Data Based on ECC Encryption Al...

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3rd International Conference on Cloud Computing, Big data Application and Software Engineering, CBASE 2024

作者： Wang, Shuang Li, Yang Xu, Guang Chen, Wei Gao, Ningning He, Zeyang R&D Center of Travelsky Technology Limited China Shunyi District Tianbei Rd Beijing101310 China

ISBN: (纸本)9798331506582

due to the large amount of computation required for authentication and matching in the data sharing phase, there is a certain delay in the real-time performance of the corresponding efficiency. Therefore, this paper proposes the research on the security sharing method of big data based on ECC encryption algorithm and casual transmission. After encrypting the shared data by using the point operation and group algorithm in ECC pairing, a digital signature for the shared data is designed;OT (3-out-of-l OT) mechanism is introduced into the sharing protocol to realize the matching of wildcard patterns between two security parties. In the test results, the increase in attribute vector length did not have a significant impact on the computational cost of the data sharing stage. The specific computational cost remained stable within 2.0 ∗ 103 byts, and the sharing time was within 35.0ms. Compared with the control group, it had a significant advantage. © 2024 IEEE.

关键词： Encryption algorithms

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Enhancing robot Perception using Vision-Aware Cognition Model

Enhancing Robot Perception using Vision-Aware Cognition Mode...

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2025 IEEE/SICE International Symposium on System Integration, SII 2025

作者： Qu, Jia Hanai, ryo ramirez-Alpizar, Ixchel G. domae, Yukiyasu Miwa, Shotaro Mitsubishi Electric Corporation Advanced Technology R&D Center Hyogo Japan Industrial Cyber-Physical Systems Research Center Tokyo Japan

ISBN: (纸本)9798331531614

In the field of robotics, the construction of advanced perception models is essential for the successful execution of complex tasks. Traditional perception models, often grounded in cognitive frameworks, fall short in adequately processing and interpreting visual data. There is a pressing need to enhance these models with advanced visual processing capabilities. The integration of sophisticated vision models with cognitive frameworks is expected to significantly enhance the performance of perception models, yet such integrations remain *** this paper, we propose a novel Vision-Aware Cognition Model that effectively merges visual and cognitive components to advance robot perception. Our model integrates a cognition model, which incorporates contextual memory for nuanced long-term memory and context comprehension, with a vision model that employs spatial attention to focus on key regions of visual input. This harmonious integration enables not only robust feature extraction but also heightened adaptability to visual environmental *** evaluated our model using a simulated robotic hand on a valve-turning manipulation task. By leveraging saliency visualization, we made the robot's decision-making process transparent, showcasing the distinct functions of the visual and cognitive components. The vision model demonstrates superior object segmentation, while the cognition model is adept at operation points tracking. By leveraging the strengths of both components, the proposed model achieves efficient hybrid feature extraction. Furthermore, we conducted quantitative evaluations of the model's adaptability to various visual changes, which revealed statistically significant performance improvements, highlighting its remarkable capacity for enhancing robot perception. © 2025 IEEE.

关键词： robot vision

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Acetonitrile-driven universal CO production across diverse metal catalysts

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Science China Chemistry 2025年第5期68卷 2110-2116页

作者： Benqiang Tian Yan Xu Haoyang Wu Yang Zhong Marshet Getaye Sendeku Haijun Xu Yun Kuang Jiazhan Li Xiaoming Sun State Key Laboratory of Chemical Resource Engineering College of ChemistryBeijing University of Chemical Technology College of Energy Storage Technology Shandong University of Science and Technology Weichai Power Co. Ltd. Ocean Hydrogen Energy R&D Center Research Institute of Tsinghua University in Shenzhen College of Mathematics and Physics Beijing University of Chemical Technology

Electrocatalytic CO2reduction to valuable chemicals with exceptional selectivity is highly ***,it is still challenging to bypass the competitive hydrogen evolution reaction（HEr） and branched pathways via regulating the structure of ***,we disclose an unconventional solvent regulation strategy to realize near-unity CO2-to-CO conversion across diverse metal catalysts including Pt,Fe,Co,Ni,Mo,W,Nb,Cu,Ag,Au,Zn,Sn,and *** water content in the acetonitrile electrolyte is precisely controlled,and the ratio of hydrogen evolution shows a positive correlation to the hydrogen binding energy of metal elements and the concentration of ***,we find that the acetonitrile could impair the interaction between*CO and metal electrode and thus promote the desorption of**** a result,the Cu electrodes display poor activity to produce hydrocarbons in acetonitrile,unlike that in aqueous solutions,and near 100%CO Faradaic efficiencies over a wide potential window（-1.9 to -2.4 V vs. Fc/Fc+） are achieved at a water concentration of 0.19 *** work reveals the solvent effect on determining the CO2rr selectivity,which adds a new dimension to tailoring the final products besides catalyst optimization.

关键词： electrocatalytic CO2 reduction nonaqueous electrolytes CO production acetonitrile

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A Wideband Non-Contact Voltage Sensing －Consideration for the dielectric relaxation of PVC－

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IEEJ Transactions on Sensors and Micromachines 2023年第6期143卷 143-144页

作者： Akeboshi, Yoshihiro Tamaki, Yuzo Taniguchi, Eiji Information Technology R&D Center Mitsubishi Electric Corporation 5-1-1 Ofuna Kanagawa Kamakura247-8501 Japan

A non-contact voltage sensing is one of the non-intrusive and galvanic methods for observing signal waveform. Frequency degradation due to the dielectric relaxation of PVC is a technical issue for the wideband (100 Hz ~ 100 MHz) sensing. In this paper, reconstruction of the frequency response using Havriliak–Negami (HM) model is discussed. © 2023 The Institute of Electrical Engineers of Japan.

关键词： dielectric relaxation

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A Transmit Array Antenna for 5G Application

A Transmit Array Antenna for 5G Application

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2024 International Symposium on Antennas and Propagation, ISAP 2024

作者： Kaushal, Shailendra Masuko, Koichiro Guan, Ning Millimeter-wave Device Research Department Electronic Application Technology R&D center Fujikura Ltd. Mutsuzaki Chiba Sakura1440 Japan Electronic Application Technology R&D Center Fujikura Ltd. Mutsuzaki Chiba Sakura1440 Japan

ISBN: (纸本)9798350364774

This paper describes a meta-surface based transmit array (TA) antenna design that operates at n257 band of 5G Nr.A transmit array composed of four substrates with single side printed layers is proposed that provides full 360 deg phase sweep for transmission loss less than 2 *** substrate layers have air between them that helps to get wider range of the phase *** types of transmit array antennas have been fabricated and checked with wide beam horn *** fabricated and simulated models produce similar results of more than 6 dBi broadside gain enhancement beyond 26 *** bandwidth obtained is more than 10 GHz. © 2024 IEEE.

关键词： Horn antennas

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