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Revealing the size effect of Fe S2on solid-state battery performances at different operating temperatures

Chinese Chemical Letters 2024年第6期35卷 189-194页

作者： Chaochao Wei Ru Wang Zhongkai Wu Qiyue Luo Ziling Jiang Liang Ming Jie Yang Liping Wang Chuang Yu School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China

FeS_(2) shows significant potential as cathode material for all-solid-state lithium batteries(ASSLBs)due to its high theoretical specific capacity,low cost,and environmental ***,the poor ion/electron conductivity and large volume variation effect of FeS_(2) inhibit its practical ***,the influence of particle size of FeS_(2) on the corresponding sulfide-based solid-state batteries is carefully investigated by tuning FeS_(2) ***,low operating temperature is chosen to mitigate the large volume changes during cycling in the battery.S-FeS_(2) with smaller particle sizes delivers superior electrochemical performances than that of the larger L-FeS_(2) in Li_(5.5)PS_(4.5)Cl_(1.5)-based ASSLBs under different operating temperatures.S-FeS_(2) shows stable discharge capacities during 50 cycles with a current density of 0.1 m A/cm^(2)under -20℃.When the current density rises to 1.0 m A/cm^(2),it delivers an initial discharge capacity of 146.9 m Ah/g and maintains 63% of the capacity after 100 *** work contributes to constructing ASSLBs enables excellent electrochemical performances under extreme operating temperatures.

关键词： FeS_(2) Size effect Li_(5.5)PS_(4.5)Cl_(1.5) electrolytes Operating temperatures Electrochemical performances

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Research on the New technology of Uninterruptible Electric Ice Melting in Distribution Network 3

Research on the New Technology of Uninterruptible Electric I...

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3rd Power System and Green Energy Conference, PSGEC 2023

作者： Xie, Xiong Yin, Hao Yang, Xiao Wang, Weiyu Li, Dayi Xu, Jiaxin Li, Jing Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350340099

To deal with the icing of overhead lines caused by frequent ice disasters, this subject proposes a new uninterruptible electric ice-melting technology for distribution network. The deicing device is composed of adjustable reactor and earthing transformer. The head end of the device is connected to the substation power supply through a transformer, and the end is short-circuited with one-phase line in the ice- covered section through a ground wire to form a zero-sequence circuit, so as to provide zero-sequence current to the line to be deiced online to make the line heat up and melt the ice to achieve deicing without power outage. After the article puts forward this scheme, the model was built in Maxwell 3D software for verification, and the ice melting test is carried out on the pilot line, which proves the feasibility of this scheme. © 2023 IEEE.

关键词： Software testing

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Synergetic effects of atmospheric plasma and UVA treatment for eye infection pathogens disinfection 6

Synergetic effects of atmospheric plasma and UVA treatment f...

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6th IEEE International Electrical and Energy Conference, CIEEC 2023

作者： Li, Mengqi Li, Yuhan Xiong, Zilan Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology WuHan China

ISBN: (纸本)9798350346671

We report a combined method of using atmospheric surface micro-discharge (SMD) with UVA exposure to provide a fast and efficient method against eye infection pathogens. 4 kinds of typical eye infection bacteria were chosen and treated under SMD treatment only, UVA exposure only and 5min SMD treatment followed by 1 or 2 min UVA exposure in buffered solution. The combination of plasma treatment and UVA exposure presented the best antibacterial effect, especially for the UV-resistant bacteria strain, Serratia marcescens. This synergetic method has been found to have no selectivity on bacterium type. The possible mechanism of the synergetic effects was preliminarily proved to be caused mainly by photodecomposition of nitrite. UVA photolysis analysis of pure nitrite, H2O2 solution and their mixture indicated the formation of peroxynitrite in buffered solution partly contributed to the anti-bacterial effect in this work. © 2023 IEEE.

关键词： Bacteria

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A Denoising Scheme for Core Earth Current of Power Transformers 3

A Denoising Scheme for Core Earth Current of Power Transform...

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3rd International Conference on Electrical engineering and Control Science, IC2ECS 2023

作者： Wu, Zhe Li, Zhaohui Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350382426

The core earth current (CEC) is composed of a variety of components, some of which can reflect the health status of power transformers, such as the power frequency and its harmonic components can reflect power transformer core grounding state and core saturation degree, and some pulse components can reflect partial discharge in power transformers. Some high-frequency components can reflect the external shock (very fast transient overvoltage, lighting, etc.) suffered by power transformers. There are also some noise components introduced by ambient environment and measurement system. The existing CEC monitoring devices focus on part of the components, such as the power frequency and its harmonic components or partial discharge pulse component. Both devices are difficult to catch all anomalies in CEC. A current transformer (10Hz-200kHz) is used to sense CEC continuously to catch all abnormal waveforms in CEC. In order to extract the pulse components in CEC, a denoising scheme based on mathematical morphological (MM) filter and wavelet shrinkage is devoted. MM filter can suppress the low frequency component while maintaining the integrity of pulse components. For the purpose of filtering out the white noise in the signal and preserve the complete pulse waveform as much as possible, a new wavelet selection method that the optimum wavelet at each level is selected as the one maximizing the energy ratio of detailed coefficients beside and inside the range formed by the threshold is devoted. Simulated data and field data are used to compare several different wavelet selection methods, and the experimental results show that the pulse distortion extracted by this method is smaller than other methods. © 2023 IEEE.

关键词： core earth current (CEC) mathematical morphology power transformers signal denoising wavelet shrinkage

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Magnet and Tracking Analysis of Quadrupole Scanning Method for Emittance Measurement

Magnet and Tracking Analysis of Quadrupole Scanning Method f...

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2024 IEEE China International Youth Conference on Electrical engineering, CIYCEE 2024

作者： Zeng, Yifeng Wang, Yan Hu, Hao Lu, Di Liu, Kaifeng Hu, Tongning School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology Wuhan430074 China

ISBN: (纸本)9798331530174

Since transverse emittance serves as a critical parameter for evaluating the performance of an electron-beam injector, accurate emittance measurement directly affects the engineering realization of not only the injector but also the entire accelerator-based facility involved. Based on the typical beam injector developed at Huazhong University of Science and technology (HUST injector), the quadrupole magnet scanning (Q-scanning) method is employed for emittance measurement. Suitable selections are made for the existing devices within the beamline, which reduce the measurement errors associated with emittance. An analysis is conducted on the selected quadrupole magnets (Q-magnets), along with an examination of the impact of fringe fields on emittance measurements, including the effects of different edge field conditions and the direct representation of fringe fields in the transfer matrix. The analysis results clearly demonstrate the importance of device selection in the Q-scanning method and the direct effects of fringe fields on various aspects. © 2024 IEEE.

关键词： Accelerator magnets

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A Double Gaussian Denoising Method for Beam Profiling in Proton Therapy 4

A Double Gaussian Denoising Method for Beam Profiling in Pro...

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4th International Conference on Electronic Information engineering and Computer technology, EIECT 2024

作者： Xiong, Haimin Tan, Ping Chen, Songbin Qian, Zhihong Tang, Dan School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology Wuhan430074 China

ISBN: (纸本)9798331528850

The beam position and size are critical for the safety of the proton therapy system. In view of the distortion of data collected by the ionization chamber during radiating, the possible physical process of noise generation is analyzed and a denoising method based on double Gaussian fitting is proposed for beam profiling in this paper. To investigate the effect of air scattering on the distortion of measured data, we performed the simulation analysis of the process after the proton beam enters the ionization chamber using Garfield++. It was found that the double Gaussian denoising method has obvious advantages over the simple single Gaussian fitting. © 2024 IEEE.

关键词： Ionization chambers

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Modulation Strategy for 2-SiC Hybrid Devices ANPC-DAB Converter Through Dual-Path Zero-state 10

Modulation Strategy for 2-SiC Hybrid Devices ANPC-DAB Conver...

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10th IEEE International Power Electronics and Motion Control Conference, IPEMC 2024 ECCE Asia

作者： Zhao, Mengyuan Zhang, Yu Chen, Yangfan Li, Zhuolan University of Science and Technology State Key Laboratory of Advanced Electromagnetic School of Electrical and Electronic Engineering Huazhong Wuhan China

ISBN: (纸本)9798350351330

The active-neutral-point-clamped three-level dual active bridge (ANPC-DAB) converter is a prominent topology for medium voltage applications. To realize high cost-efficiency, the hybrid utilization of Si and SiC devices has been an attractive approach. In this paper, a 2-SiC hybrid devices ANPC-DAB converter is studied, which optimally utilizes both Si IGBTs and SiC MOSFETs to achieve the tradeoff between performance and cost. A modulation strategy through dual-path zero-state (DPZS) is proposed to achieve zero-voltage switching (ZVS) turn-on of all switches when combining proper current conditions and optimally balance the switching losses among the switches. Meanwhile, the presented method achieves small dead zones and short commutation loops during switching process. Finally, the experimental results are given to verify the effectiveness of the modulation strategy. © 2024 IEEE.

关键词： Silicon carbide

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An Energy-Communication Network Restoration Strategy under Joint Dispatch of Drone Small Cell and Maintenance Personnel 3

An Energy-Communication Network Restoration Strategy under J...

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3rd International Conference on Energy engineering and Power Systems, EEPS 2023

作者： Wang, Tao Huang, Zixin Li, Zhao Zhang, Zhiyu Lin, Xiangning Li, Zhengtian Wei, Fanrong Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350313857

Currently, the restoration of energy and communication networks in post-disaster power distribution systems is often considered independently, lacking effective coordination. To address this issue, this paper proposes a post-disaster recovery strategy for the energy-communication network of power distribution systems that involves coordinated scheduling of drone small cell (DSC) and maintenance personnel (MP). Firstly, scheduling models of DSC and MP are established to quantitatively analyze their temporal and spatial characteristics. Then, a post-disaster recovery strategy is proposed for the energy-communication network under the coordinated scheduling of DSC and MP. The energy-communication network is restored with the objective of minimizing the operating costs of the post-disaster power distribution system. The effectiveness of the proposed strategy is verified through numerical simulations based on an improved IEEE 33-node distribution network. © 2023 IEEE.

关键词： Operating costs

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Star-Connected Modular Auxiliary Resonant Commutated Pole Inverter with Commutation-Aligned PWM Modulation 26

Star-Connected Modular Auxiliary Resonant Commutated Pole In...

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26th International Conference on Electrical Machines and Systems, ICEMS 2023

作者： Ding, Zehuan Gan, Chun Shi, Haochen Ni, Kai Qu, Ronghai Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350317589

This paper proposes a modular auxiliary resonant commutated pole (MARCP) inverter. The MARCP inverter eliminates the need for a connection to the DC bus or midpoint potential and has the same resonant branch for each phase, which enables its modular combination with any phase of inverters. During the operation of the proposed MARCP inverter, resonant currents are constructed in the commutation front through the voltage difference between the three bridge arms, which makes all the bridge arms resonantly commutated at the commutation-aligned moment. After commutation, resonant currents feedback to the power source. All the switches of the MARCP inverter can achieve soft-switching or pseudosoft-switching during the full switching period. In this paper, the effectiveness of the proposed topology and control method is verified by simulation. Compared with the auxiliary resonant commutated pole (ARCP) inverter, the MARCP inverter eliminates the coupling inductor or voltage dividing capacitor, which reduces the device requirement and size of the inverter. Furthermore, the main circuit and resonant circuit of the MARCP inverter are independent of each other, which is convenient for repairing and converting the hard-switching to soft-switching. © 2023 IEEE.

关键词： Pulse width modulation

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A Fast Transient Current Control Strategy for Three-Phase Dual-Active Bridge Converter

A Fast Transient Current Control Strategy for Three-Phase Du...

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2024 CPSS and IEEE International Symposium on Energy Storage and Conversion, CPSS and ISESC 2024

作者： Zhao, Mengyuan Zhang, Yu School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Wuhan China

ISBN: (纸本)9798350380514

The three-phase dual-active bridge converter (3pDAB) is becoming a promising topology due to the advantages of higher power density and efficiency. Under phase-shift (PS) modulation, the phase-shift angle will have a significant step change when the transmission power is quickly adjusted, which will cause serious transient oscillation of the inductance current and pose a risk to the safety of the converter. Focusing on the widely utilized single phase-shift (SPS) modulation, this paper examines the transient process of 3pDAB resulting from variations in the phase-shift angle. Then, by temporarily adjusting the external phase-shift angle, a fast transient current control strategy (FTCC) is proposed to mitigate oscillations, effectively managing the transient process within one-third of a switching cycle and facilitating smooth transmission power adjustments. Furthermore, the impact and oscillation of inductance current during transient process are significantly reduced. Finally, the performance of the control strategy was verified. © 2024 IEEE.

关键词： electromagnetic transients

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