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Mechanisms and Mitigation Strategies of Gas Generation in Sodium-Ion Batteries

Nano-Micro Letters 2025年第8期17卷 17-48页

作者： Xingyan Li Xi Chen Meng Li Haoran Wei Xuming Yang Shenghua Ye Liewu Li Jing Chen Xiangzhong Ren Xiaoping Ouyang Jianhong Liu Xiangtong Meng Jieshan Qiu Biwei Xiao Qianling Zhang Jiangtao Hu Graphene Composite Research Center College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China GRINM(Guangdong)Research Institute for Advanced Materials and Technology Foshan 528051GuangdongPeople’s Republic of China School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105People’s Republic of China College of Chemical Engineering State Key Laboratory of Organic-Inorganic CompositesState Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

The transition to renewable energy sources has elevated the importance of SIBs(SIBs)as cost-effective alternatives to lithium-ion batteries(LIBs)for large-scale energy *** review examines the mechanisms of gas generation in SIBs,identifying sources from cathode materials,anode materials,and electrolytes,which pose safety risks like swelling,leakage,and *** such as CO_(2),H_(2),and O_(2) primarily arise from the instability of cathode materials,side reactions between electrode and electrolyte,and electrolyte decomposition under high temperatures or *** mitigation strategies,encompassing electrolyte design,buffer layer construction,and electrode material optimization,are deliberated ***,subsequent research endeavors should prioritize long-term high-precision gas detection to bolster the safety and performance of SIBs,thereby fortifying their commercial viability and furnishing dependable solutions for large-scale energy storage and electric vehicles.

关键词： Sodium-ion batteries Gas evolution mechanism Inhibition strategies of gas generation High-performance sodium-ion battery roadmap

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Fluorinated Electrolyte-Assisted Dry Nano LLZO Composite Solid-state Electrolytes for Lithium-Metal Batteries 3

Fluorinated Electrolyte-Assisted Dry Nano LLZO Composite Sol...

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2024 3rd International Youth Scientist Forum - Academic Symposium on New Energy and New Material, IYSF-NENM 2024

作者： Han, Qigao Wang, Fuhe Wang, Fengqian Ji, Shuaijing Zhong, Jun Du, Jinqiao Tian, Jie Zhang, Weixin Tang, Shun Cao, Yuancheng Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China Shenzhen Power Supply Co. Ltd. Shenzhen518001 China

Li7La3Zr2O12 composite solid-state electrolytes (LLZO CSSEs) face severe application challenges due to the effect of grain boundary impedance. For this reason, the ionic conduction blocking effect caused by the polymer is mitigated by a dry process while reducing the polymer content. When paired with the designed fluorinated electrolyte, the ionic conductivity of the LLZO CSSEs reach 1.52 mS cm-1, exhibiting a significant ionic conduction synergistic effect. The wide electrochemical stabilization window and better flame retardancy can guarantee the stable application of LLZO CSSEs in lithium-metal batteries, and the lithium symmetric batteries can be stably cycled more than 1000 hours under the current density of 1 mA cm-2. The Li|LiNi0.8Co0.1Mn0.1O2 solid-state batteries achieved a better rate performance with the specific capacity of 128.50 mAh g-1 under the current of 5 C. These results indicate that LLZO CCSEs have the potential for further applications and are contributed to the development of lithium-metal batteries. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Solid-state Batteries

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Fatigue failure analysis and heat treatment strategy optimization of torsion bar spring for automobile suspension system used in light vehicles

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Journal of Iron and Steel Research International 2025年第3期32卷 799-811页

作者： Jia-xing Liu Yong-jin Wu Chao-lei Zhang Wan-li Sun Wen-bin Ding Shuai-jun Dong Institute for Carbon Neutrality School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing100083China Institute of Steel Sustainable Technology Liaoning Academy of MaterialsShenyang110167LiaoningChina

The failure analysis was conducted on unqualified torsion bar spring in automobile suspension system used for light vehicles during engine *** effects of through hardening,surface induction hardening,quenching and tempering,and tempering temperature on the microstructure and fatigue life of 45CrNiMoVA steel torsion bars were also *** showed that only the torsion bar spring after through quenching and tempering is subjected to surface induction quenching and tempering to achieve the fatigue life of the qualified torsion *** fatigue life of torsion bar spring reaches 3×10^(5) cycles more than the required 2×10^(5) *** is because the distribution of gradient microstructure was helpful to relieve the applied stress during the fatigue *** microstructure of the non-hardened region,which consists of tempered sorbite regardless of whether it is tempered at 330 or 430℃,contributes to minimizing the impact of temper brittleness on the fatigue life of the torsion ***,the fatigue life of the torsion bar is relatively unaffected by temper brittleness due to the presence of tempered sorbite in its non-hardened *** the reason for the unqualified fatigue life was that the depth and hardness of the hardened region did not meet the standard requirements of 5–7 mm and 47–52 HRC,respectively.

关键词： Fatigue life Torsion bar Tempering temperature 45CrNiMoVA steel Fracture

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Numerical Simulation and Experimental Investigation on Friction and Lubrication Behaviors of Chevron Micro-Textured Valve Plate/Cylinder Block Interface With Various Area Densities

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Journal of Tribology 2025年第7期147卷 072201页

作者： Chen, Luanxia Liu, Zhanqiang Huang, Haihong Zhu, Yingying School of Mechanical Engineering Hefei University of Technology Hefei230009 China Key Laboratory of Green Design and Manufacturing of Mechanical Industry Hefei University of Technology Hefei230009 China School of Mechanical Engineering Shandong University Jinan250061 China State Key Laboratory for High-end Equipment and Advanced Technology of Metal Forming Shandong University Jinan250061 China

As the critical friction pairs of swashplate-type axial piston pumps, the cylinder block/valve plate lubricating interface is the primary source of friction, wear, and leakage in axial piston pumps. Surface micro-texturing has been widely employed in cylinder block/valve plate conjunctions to ameliorate tribological performance. However, little research has been conducted to investigate the influence of chevron micro-texture area density on the tribological behaviors and lubricating properties of cylinder block/valve plate interface both experimentally and numerically. In this article, the chevron micro-textures with various area densities were manufactured on H62 brass by micro-milling and subsequently characterized with a laser scanning confocal microscope (LSCM). The friction and wear performance of H62 brass/38CrMoAl conjunctions were obtained via disc-on-disc tribological tests to simulate the cylinder block/valve plate lubricating interface. Moreover, the load-carrying capacity of untextured and chevron micro-textured samples was numerically investigated under hydrodynamic lubrication. It was found that the chevron micro-textured surface with an area density of 30.1% displayed the lowest friction coefficient and the shallowest wear depth. Although the load-carrying capacity of chevron micro-textured samples with a high dimple area density was larger, the severe stress concentration induced by the reduced micro-texture spacing caused the increment and large fluctuations of friction coefficient. Copyright © 2024 by ASME.

关键词： Friction

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NaTiOx-modified high-nickel layered oxide cathode for stable sodium-ion batteries

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Carbon Energy 2025年第1期7卷 283-291页

作者： Yingcong Liu Xing Zhou Dongwei He Xiaowei Liu Chao Yang Dawei Xu Meilong Wang Ruitao Sun Bin Zhang Jingjing Xie Jin Han Wen Chen Ya You State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Yibin Libode New Materials Co.Ltd SichuanChina International School of Materials Science and Engineering School of Materials Science and MicroelectronicsWuhan University of TechnologyWuhan 430070China

The O3-type layered cathode with high Ni content has attracted much attention because of its high capacity and simple synthesis ***,surface side reaction and O3-P3 phase transitions would occur during Na+insertion/extraction,resulting in unsatisfying electrochemical ***,O3-Na[Ni_(0.6)Co_(0.2)Mn_(0.2)]O_(2)(NNCM622)cathode is modified by a NaTiOx coating layer in a wet chemistry method,which reduces the parasitic reaction and facilitates Na+***,the partially doped Ti improves structural stability by restraining the irreversible multiple-phase *** a result,the modified NNCM622 cathode obtains a high specific capacity of 143.4 mAh g^(−1)and an improved capacity retention of 69%after 300 *** work offers new prospects for stabilizing the NNCM622 cathode with a feasible coating strategy.

关键词： cathode high-nickel layered oxides sodium-ion battery surface modification

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Fine-Tuning the Resonant Frequency in electromagnetic Vibration Energy Harvesting System 5th

Fine-Tuning the Resonant Frequency in Electromagnetic Vibrat...

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5th International Conference on Vibration and Energy Harvesting Applications, VEH 2024

作者： Ma, Haosheng Peng, Han Xiao, Hongfei Sun, Hanyi Zhao, Yidong Lei, Junhao State Key Lab of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China China-EU Institute for Clean and Renewable Energy Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9789819611904

The electromagnetic vibration energy harvesting system is designed to extract energy from the vibrations, with its resonant frequency specifically tuned to match the primary vibration frequency of the energy source. However, the vibration frequency often deviates from resonant frequency under different operation/weather and installation circumstances. Such deviation can lead to a significant decrease in the collected output power. For example, a 1 Hz deviation in the vibration frequency results in a 51.3% decrease in induced voltage and a 76.3% decrease in output power. state-of-the-art wideband EVEH devices have either low output power or relatively large volume. Adopting a wideband EVEH is not a good choice. To address this issue, this paper proposes a new approach for fine-tuning the resonant frequency of EVEH by changing the structure of the spring. The details of the method is to add or remove bridge arms changing the rotation angle of the cantilever beams. The advantage of this method lies in the convenience of finely tuning the device's frequency while obtaining a larger output power. The results demonstrate that for the EVEH device designed at a resonant frequency of 60 Hz, the primary resonant frequency can vary from 58.5 to 59.5 Hz by nylon bridge arms. At resonant frequencies of 59 Hz and 0.5 g acceleration, the output voltage is increased by 77.1%. Output power reaches 15 mW, representing a 213.8% improvement. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Energy harvesting

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Study on Double Feedforward Control Strategy for Three-Level Buck-Boost Bi-Directional Converter Applied in Energy-Storage Inverters 11th

Study on Double Feedforward Control Strategy for Three-Level...

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11th Frontier Academic Forum of Electrical engineering, FAFEE 2024

作者： Zhou, Chijun Fang, Yu Chen, Jie Li, Rui Shu, Kaixin Wang, Xuehua College of Information Engineering Yang Zhou University Yang Zhou China College of Electrical Energy and Power Engineering Yang Zhou University Yang Zhou China The State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9789819788156

This paper focuses on the three-level Buck-Boost Bi-directional converter (TL Buck-Boost BDC) applied in energy-storage inverters serving as charging or discharging circuit for storage battery. Based on the traditional dual closed-loop control method, a dual feedforward control strategy based on the balanced duty cycle signal at the midpoint of the direct current bus (DC Bus) and the battery voltage duty cycle signal is proposed. The balanced duty cycle signal at the midpoint of the DC Bus is generated by the balanced feedforward generator, and the battery voltage duty cycle signal is generated by the battery voltage feedforward generator. These two duty cycle signals are superimposed with the duty cycle signal generated by the dual closed-loop control to construct the duty cycle signal used to control the switching on or off of the switches in the TL Buck-Boost BDC, thereby achieving stable control of the charging or discharging operation in the energy-storage inverter while ensuring the DC-Bus voltage, Realized DC-Bus midpoint balance and improving the dynamic response speed of the system. The control parameters of the TL Buck-Boost BDC is designed, and the correctness and reliability of the method studied in this paper is verified by experimental results. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Buck converter

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Mechanism of the External Short Circuit Induced Internal Short Circuit in Liquid Metal Batteries

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IEEE Transactions on Industry Applications 2025年

作者： Zhang, Yi Zhang, E. Li, Haomiao Zhou, Min Jiang, Kai Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Wuhan430074 China

Battery technology is pivotal in large-scale energy storage systems, valued for its flexibility and high efficiency. Among various options, liquid metal batteries (LMBs) stand out with promising applications in the energy storage field, thanks to their low cost, long lifespan, high safety, and large capacity. External short circuits (ESC), as a common form of abuse, can potentially lead to more severe internal short circuits (ISC). However, most existing research on LMB has not thoroughly addressed the underlying trigger mechanism. In this paper, the trigger mechanism is revealed through the electrode morphology analysis and proved by the multiphysics model simulation. In the ESC process, the irregular lithium deposition is induced by the uneven current density, which finally leads to the contact between the anode and cathode, that is, ISC. The ISC is most likely to occur at the center of the cathode or near its junction with the cathode shell. The insights gained from this study may be of assistance to improve the configuration design of LMB and reduce the risk of short circuits occurring in the application. © 1972-2012 IEEE.

关键词： Indium phosphide

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Experimental demonstration of D-band signals wireless transmission over 30 km

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Science China(Technological Sciences) 2025年第2期68卷 318-320页

作者： Yi WEI Xiongwei YANG Jianjun YU Xianming ZHAO Mingxu WANG Jingwen TAN Weiping LI Feng ZHAO Chengzhen BIAN Hansong MA Qinyi ZHANG Qiutong ZHANG Bing Zhang Wen ZHOU Kaihui WANG Sicong XU Jianguo YU State Key Laboratory of ASIC and System Key Laboratory for Information Science of Electromagnetic Waves(MoE)and School of Information Science and TechnologyFudan UniversityShanghai 200433China Harbin Institute of Technology Harbin 150001China School of Automation Xi’an University of Posts and TelecommunicationsXi’an 710121China School of Electronic Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

Due to the rise of innovative technologies like artificial intelligence(AI),the Internet of Things(IoT),and telemedicine,the demand for internet traffic is rapidly *** order to achieve ultra-high-speed wireless communication,many researchers are directing their efforts towards the *** D-band,spanning the frequency band 110-170 GHz,has abundant spectrum resources and license-free characteristics[1,2].

关键词： IoT wireless band

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Absorption-Reflection-Transmission Power Coefficient Guiding Gradient Distribution of Magnetic MXene in Layered Composites for electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第6期17卷 466-481页

作者： Yang Zhou Wen Zhang Dong Pan Zhaoyang Li Bing Zhou Ming Huang Liwei Mi Chuntai Liu Yuezhan Feng Changyu Shen State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial EquipmentNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002People’s Republic of China Yaoshan Laboratory Pingdingshan UniversityPingdingshan 467000People’s Republic of China

The morphological distribution of absorbent in composites is equally important with absorbents for the overall electromagnetic properties,but it is often ***,a comprehensive consideration including electromagnetic component regulation,layered arrangement structure,and gradient concentration distribution was used to optimize impedance matching and enhance electromagnetic *** the microscale,the incorporation of magnetic Ni nanoparticles into MXene nanosheets(Ni@MXene)endows suitable intrinsic permittivity and *** the macroscale,the layered arrangement of Ni@MXene increases the effective interaction area with electromagnetic waves,inducing multiple reflection/scattering *** this basis,according to the analysis of absorption,reflection,and transmission(A-R-T)power coefficients of layered composites,the gradient concentration distribution was constructed to realize the impedance matching at low-concentration surface layer,electromagnetic loss at middle concentration interlayer and microwave reflection at high-concentration bottom ***,the layered gradient composite(LG5-10-15)achieves complete absorption coverage of X-band at thickness of 2.00-2.20 mm with RL_(min) of-68.67 dB at 9.85 GHz in 2.05 mm,which is 199.0%,12.6%,and 50.6%higher than non-layered,layered and layered descending gradient composites,***,this work confirms the importance of layered gradient structure in improving absorption performance and broadens the design of high-performance microwave absorption materials.

关键词： Magnetic MXene Layered and gradient structure Power coefficient electromagnetic wave absorption

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