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High-rate sodium metal batteries enabled by trifluormethylfullerene additive

Nano Research 2022年第8期15卷 7172-7179页

作者： Pengju Li Xiaobo Huang Zhipeng Jiang Han Zhang Pengwei Yu Xing Lu Jia Xie State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong 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

Sodium metal is a promising anode for sodium batteries due to its high theoretical capacity and low ***,the serious Na dendrite growth and low Coulombic efficiency,especially at high current densities/cycling capacities,severely limit the application of sodium metal ***,trifluoromethylfullerene,C_(60)(CF_(3))_(6),is designed as an electrolyte additive to enable the high-rate cycling of sodium metal anodes with high Coulombic *** CF3 groups contribute to the formation of stable NaF-rich solid electrolyte interface layer,while C_(60)cages induce the uniform distribution of sodium ions and promote the formation of smooth and compact ***,Na||Cu cell with C_(60)(CF_(3))_(6)can be cycled at 2 mA·cm^(−2)and 10 mAh·cm^(−2)over 180 cycles with an average Coulombic efficiency of 99.9%,and Na||Na cell can be cycled at 10 mA·cm^(−2)over 600 ***,Na||NaV2(PO_(4))_(3)@C full cell exhibits high capacity retention of 84%over 2,000 cycles at 20 C(~3 mA·cm^(−2)).

关键词： sodium metal anode fullerene trifluormethylfullerene high rate electrolyte additive

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Effect of surface morphology on armature melt wear 10

Effect of surface morphology on armature melt wear

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10th Euro-Asian Pulsed Power Conference, 25th International Conference on High-Power Particle Beams and 20th International Symposium on electromagnetic Launch technology, EAPPC-BEAMS-EML 2024

作者： Zhao, Bingxuan Chen, Lixue Xu, Shengqin Xu, Xuan Zhang, Wenhao Xiao, Tingyun Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology Key Laboratory of Pulsed Power Technology Ministry of Education School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9789038661353

Armature melting during electromagnetic launch affects the electrical contact characteristics between armature and rail, which in turn affects the launching process and the service life of the launcher. A coupled multi-physics field model considering rough surfaces is constructed. Based on this, the influence law on armature erosion characteristics is *** results show that the higher the armature surface characteristic scale factor the lower the overall armature temperature, the later the melting onset time, but the more uneven armature surface melting;the higher the surface fractal dimension the less armature melting. The results provide a reference for the optimization of armature surface processing. © 2024 Eindhoven University of technology.

关键词： Fractal dimension

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Influence of arc armature geometric parameters on current distribution at the armature/guideway interface 10

Influence of arc armature geometric parameters on current di...

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10th Euro-Asian Pulsed Power Conference, 25th International Conference on High-Power Particle Beams and 20th International Symposium on electromagnetic Launch technology, EAPPC-BEAMS-EML 2024

作者： Chen, Lixue Zhao, Bingxuan You, Penghao Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology Key Laboratory of Pulsed Power Technology Ministry of Education School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9789038661353

In this paper, a parametric model of arc armature is established. And simulation models considering velocity skinning effect and pre-contact resistance are also established in this paper using COMSOL. Through this model, the effects of each parameter of the armature on the current distribution at the armature-rail interface are investigated, and by processing the results, the effects of different parameters on the current distribution at the armature-rail interface are compared. It is shown that the curvature of the arc surface, the amount of internal retraction and the length of the tailplane have the greatest influence on the current distribution at the armature-rail interface. © 2024 Eindhoven University of technology.

关键词： electromagnetic launchers

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Manipulating Interfacial Stability via Preferential Absorption for Highly Stable and Safe 4.6 V LiCoO_(2) Cathode

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Nano-Micro Letters 2025年第8期17卷 95-110页

作者： Long Chen Xin He Yiqing Chen Youmin Hou Yujie Zhang Kangli Wang Xinping Ai Yuliang Cao Zhongxue Chen Key Laboratory of Hydraulic Machinery Transients Ministry of EducationSchool of Power and Mechanical EngineeringWuhan UniversityWuhan 430072People’s Republic of China State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China Hubei Key Laboratory of Electrochemical Power Sources College of Chemistry and Molecular SciencesWuhan UniversityWuhan 430072People’s Republic of China

Elevating the upper cutoff voltage to 4.6 V could effec-tively increase the reversible capacity ofLiCoO_(2)(LCO)cathode,whereas the irreversible structural transition,unstable electrode/electrolyte interface and potentially induced safety hazards severely hinder its industrial *** a robust cathode/electrolyte interface film by electrolyte engineer-ing is one of the efficient approaches to boost the performance of high-voltage LCO(HV-LCO);however,the elusive interfacial chemistry poses substantial challenges to the rational design of highly compatible ***,we propose a novel electrolyte design strategy and screen proper solvents based on two factors:highest occupied molecular orbital energy level and LCO absorption ***(2,2,2-trifluoroethyl)phosphate is determined as the optimal solvent,whose low defluorination energy barrier significantly promotes the construction of LiF-rich cathode/electrolyte interface layer on the surface of LCO,thereby eventually suppresses the phase transition and enhancesLi+diffusion *** rationally designed electrolyte endows graphite||HV-LCO pouch cells with long cycle life(85.3%capacity retention after 700 cycles),wide-temperature adaptability(-60–80℃)and high safety(pass nail penetration).This work provides new insights into the electrolyte screening and rational design to constructing stable interface for high-energy lithium-ion batteries.

关键词： Electrolyte design LiF-rich interface Wide-temperature High-safe 4.6 V LCO

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O-doping strategy enabling enhanced chemical/electrochemical stability of Li_(3)InCl_(6) for superior solid-state battery performance

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Journal of Energy Chemistry 2024年第12期99卷 484-494页

作者： Qiyue Luo Chen Liu Lin Li Ziling Jiang Jie Yang Shaoqing Chen Xia Chen Long Zhang Shijie Cheng Chuang Yu State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074HubeiChina College of Energy Soochow Institute for Energy and Materials InnovationsJiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006JiangsuChina College of Physics and Energy Fujian Normal UniversityFuzhou 350117FujianChina

Solid-state electrolytes with high oxidation stability are crucial for achieving high power density allsolid-state lithium *** electrolytes are promising candidates due to their outstanding compatibility with cathode materials and high Li^(+)***,the electrochemical stability of chloride electrolytes is still limited,leaving them unsuitable for ultrahigh voltage ***,chemical compatibility issue between sulfide and halide electrolytes affects the electrochemical performance of all-solid-state ***,Li-ion conductor Li_(3+x)InCl_(6-x)O_(x) is designed to address these ***_(3.25)InCl_(5.75)O_(0.25)shows a Li-ion conductivity of 0.90 mS cm^(-1)at room temperature,a high onset oxidation voltage of 3.84 V,fewer by-products at ultrahigh operation voltage,and good chemical compatibility with Li_(5.5)PS_(4.5)Cl_(1.5).The Li_(3.25)InCl_(5.75)O_(0.25)@LiNi_(0.7)Co_(0.1)Mn_(0.2)O_(2)-Li_(3.25)InCl_(5.75)O_(0.25)-VGCF/Li_(3.25)InCl_(5.75)O_(0.25)/Li_(5.5)PS_(4.5)Cl_(1.5)/Li-In battery delivers good electrochemical performances at high operating *** work provides a simple,economical,and effective strategy for designing high-voltage all-solid-state electrolytes.

关键词： Li_(3)InCl_(6) O doping Wide electrochemical window Chemical stability Interfacial stability Superior electrochemical performance

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Launch Efficiency of Capacitive Energy-Storage electromagnetic Railgun System 10

Launch Efficiency of Capacitive Energy-Storage Electromagnet...

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10th Euro-Asian Pulsed Power Conference, 25th International Conference on High-Power Particle Beams and 20th International Symposium on electromagnetic Launch technology, EAPPC-BEAMS-EML 2024

作者： Xiao, Tingyun Chen, Lixue Xu, Xuan Xu, Shengqin Zhang, Wenhao Zhao, Bingxuan Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology Key Laboratory of Pulsed Power Technology Ministry of Education School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9789038661353

electromagnetic railgun have high initial velocity, long range and other advantages. Improving the launch efficiency is one of the most important needs for the application of electromagnetic rail launch technology. Based on the subsystem models of pulse power supply, rail and armature of railgun, the equivalent circuit mathematical model of the electromagnetic rail gun system under lumped parameters is established. The effects of capacitance, voltage, inductance, resistance and acceleration distance on the system efficiency were simulated and analyzed. The results of the study are of great significance in guiding the design of the electromagnetic launch system. © 2024 Eindhoven University of technology.

关键词： Rail guns

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A Fast Transient Control Method for Dual-Bridge Series Resonant Converter 2

A Fast Transient Control Method for Dual-Bridge Series Reson...

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2nd IEEE International Power Electronics and Application Symposium, PEAS 2023

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

ISBN: (纸本)9798350313765

Under extended-phase-shift (EPS) modulation, both the internal phase-shift angle and the external phase-shift angle will have large step changes when the dual-bridge series resonant converter (DBSRC) rapidly adjusts the transmission power. This will cause serious oscillations in the resonant current and resonant voltage of DBSRC and threaten the safety of the converter. This paper analyzes the transient process produced by sudden changes in phase shift angles under EPS modulation. Then a fast transient control method is proposed for suppressing the oscillation by utilizing both internal and external phase-shift angles, which controls the transient process within one switching cycle and achieves a smooth transition of transmission power. Besides, impact and oscillation on the resonant current and resonant voltage during transient processes are significantly reduced. Finally, the performance of the control method is verified based on experimental and simulation results. © 2023 IEEE.

关键词： DBSRC EPS fast transient control oscillation impact series resonant

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Modified Nine-Switches High Step-up Ratio Boost-Only Y-inverter with Common Ground 26

Modified Nine-Switches High Step-up Ratio Boost-Only Y-inver...

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

作者： Dai, Youlun Wang, Jin Wang, Hu Li, Mengyuan Zhou, Libing Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9798350317589

The article proposes a modified nine-switches high step-up ratio boost-only Y-inverter with common ground. This new inverter inherits the major advantages of the double dual topology and Y-inverter, and the circuit is modified so that both input and output are common-grounded, which ensures high voltage gain in three-phase systems. Meanwhile, the circuit topology reduces three switches, without increasing voltage stress, magnetic volume, or reducing voltage gain. Eventually, a double-loop control scheme in which input current and output voltage are used as control variables is designed here for the proposed Y-inverter. The feasibility is confirmed by Simulink simulation, which has provided a basis for future research. © 2023 IEEE.

关键词： Topology

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A Review on the Control Strategies for Differential Boost Inverter 26

A Review on the Control Strategies for Differential Boost In...

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

作者： Li, Mengyuan Wang, Jin Wang, Hu Dai, Youlun Zhou, Libing Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9798350317589

The differential boost inverter (DBI) has gained a great deal of interest in academia due to its advantages. Compared with conventional cascaded topology composed of a DC-DC boost circuit and a voltage source inverter, DBI needs only one-level topology to achieve boost inverter, thus has higher efficiency and lower cost. The three-phase DBI can be applied to motor drives and grid connection. Based on analyzing the structure and operating principle of three-phase DBI, this paper presents an elaborate and in-depth review of typical control strategies for three-phase DBI, including their basic principles, key features, exiting issues, and relevant suggestions, and finally reports the development tendency of the control strategies. © 2023 IEEE.

关键词： Topology

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Design of a 13 Tesla Hybrid Magnet

Design of a 13 Tesla Hybrid Magnet

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2023 IEEE International Conference on Applied Superconductivity and electromagnetic Devices, ASEMD 2023

作者： Yang, Zhixing Ren, Li Duan, Pu Xu, Ying Shi, Jing Huazhong University of Science and Technology The State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9798350301571

The Iron-based superconductors(IBS) have high upper critical field, low anisotropy and strong current carrying capacity, which are expected to be the next-generation high temperature superconductors. This paper describes a 13 Tesla hybrid magnet using YBCO tapes and iron-based tapes. The design approach is aimed at verifying the superiority of Iron-based superconducting tapes using a shorter length of IBS tapes. The support structure is designed to improve the mechanical stability of magnets. Through mechanical analysis, it is verified that the magnet meets the design requirements and the operation stability. © 2023 IEEE.

关键词： hybrid magnet iron-based superconductor magnet design

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