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International Conference of Electrical, Electronic and Networked Energy Systems, EENES 2024

作者： Xu, Rong Wang, Jiong Li, Tao Ye, Wenyi Cheng, Wenping Yan, Ping Xu, Weidong Institute Electrical Engineering Chinese Academy of Sciences Beijing100190 China Key Laboratory of Power Electronics and Electric Drives Chinese Academy of Sciences Beijing100190 China Key Laboratory of High Density Electromagnetic Power and Systems Chinese Academy of Sciences Beijing100190 China Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu Zhongke Jinan250104 China

ISBN: (纸本)9789819620791

The temperature of the rail is increasing in a short period of time by the Joule heat generated by the high current passing the contact surface between the rail and the armature, the frictional heat generated by the armature’s movement on the rail surface during the electromagnetic launching process. The launch performance is affected by the surface temperature of the track sharply increases and a decrease in the mechanical performance of the rail. The rail temperature simulation model and tests of the model is established by launch experiments. The model is modified and improved to provide support for the optimization design of thermal management system. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Launching

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Polybenzimidazolium-reinforced polyimide separators to inhibit dendrites for high-security lithium-ion batteries

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Science China Chemistry 2025年

作者： Guohua Sun Jiaqi Cui Qingsong Zhang Yisong Zhou Xinluo Li Yingying Zhang Zhanao Zhang Xin Zhang Jiantao Fan Pengpeng Li Lianlong Hou Nanjun Chen Hebei Key Laboratory of Flexible Functional Materials School of Materials Science and Engineering Hebei University of Science and Technology State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University

Lithium dendrite formation poses a significant safety hazard in lithium-ion batteries（LIBs）, severely impeding their widespread adoption and further technological advancements. Here, we present a novel quaternized polybenzimidazolium（q-PBI） to armor polyimide（PI） nanofiber separator（q-PBI@PI）, in which the q-PBI containing lithiophilicity and anionphilicity sites serves as the multifunctional nano-layers to suppress the Li dendrite and reinforce the mechanical properties of PI nanofiber ***, the q-PBI@PI separator displays an unprecedented mechanical strength of 82.8 MPa, significantly outperforming previously reported PI nanofiber membranes（typically below 50.0 MPa）. Besides, we demonstrate that the q-PBI@PI separator simultaneously possesses low nucleation overpotential（59 mV） and exceptional average coulombic efficiency due to the suppression of Li dendrite. Importantly, q-PBI@PI-based Li||Li battery enables a stable Li plating-stripping at 1.0 m A cm-2for600 h. Attributing to these exceptional merits, the armored PI separator-based LIBs display remarkable specific capability and capacity retention. The density function theory calculations reveal that q-PBI is conducive to the desolvation of Li+and can immobilize Li+and PF6-ions near affinity sites of PI nanofibers for inhibiting the formation of Li dendrites. Our work paves a new avenue for the design of next-generation high-performing separators in LIBs.

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Spatially confined synthesis of TiNb_(2)O_(7)quantum dots onto mesoporous carbon and Ti_(3)C_(2)T_(X)MXene for boosting lithium storage

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Green Energy & Environment 2025年第2期10卷 358-366页

作者： Daoguang Sun Cheng Tang Haitao Li Xinlin Zhang Guanjia Zhu Zhen-Dong Huang Aijun Du Haijiao Zhang Institute of Nanochemistry and Nanobiology School of Environmental and Chemical EngineeringShanghai UniversityShanghai200444China School of Chemistry and Physics and Centre for Materials Science Queensland University of TechnologyBrisbaneQLD4001Australia State Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts and Telecommunications9 Wenyuan RoadNanjing210023China

TiNb_(2)O_(7)has been emerged as one of the most promising electrode materials for high-energy lithium-ion ***,limited by the slow electron/ion transport kinetics,and insufficient active sites in the bulk structure,the TiNb_(2)O_(7)electrode still suffers from unsatisfactory lithium storage ***,we demonstrate a spatially confined strategy toward a novel TiNb_(2)O_(7)-NMC/MXene composite through a triblock copolymer-directed one-pot solvothermal route,where TiNb_(2)O_(7)quantum dots with a particle size of 2-3 nm are evenly embedded into N-doped mesoporous carbon(NMC)and Ti_(3)C_(2)T_(X)***,the as-prepared TiNb_(2)O_(7)-NMC/MXene anode exhibits a high reversible capacity(486.2 mAh g^(-1)at 0.1 A g^(-1)after 100 cycles)and long cycle lifespan(363.4 mAh g^(-1)at ss1 A g^(-1)after 500 cycles).Both experimental and theorical results further demonstrate that such a superior lithium storage performance is mainly ascribed to the synergistic effect among 0D TiNb_(2)O_(7)quantum dots,2D Ti_(3)C_(2)T_(X)MXene nanosheets,and N-doped mesoporous *** strategy presented also opens up new horizon for space-confined preparation of high-performance electrode materials.

关键词： TiNb_(2)O_(7)quantum dots Ti_(3)C_(2)T_(X)MXene Mesoporous carbon Confined synthesis Lithium-ion batteries

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Itinerant-electron dynamics suppressing Jahn-Teller distortions: Enabling high-rate and stable sodium-ion storage

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Journal of Energy Chemistry 2025年 107卷 780-791页

作者： Yao, Shuyun Yang, Zhiyu Wang, Shiyu Liu, Yuanming Ji, Yingjie Ji, Kang Zhang, Feike Fu, Weijie Wu, Ningning Xie, Jiangzhou Yan, Yi-Ming State Key Lab of Organic-Inorganic Composites Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing100029 China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin300401 China School of Mechanical and Manufacturing Engineering University of New South Wales SydneyNSW2052 Australia

Jahn-Teller distortion (JTD) remains a fundamental bottleneck for transition metal oxides (TMOs) in electrochemical energy storage, where the eg-orbital single-electron occupancy induces irreversible octahedral collapse and rapid capacity fading. Here, we pioneer an itinerant-electron-mediated dynamic suppression strategy that fundamentally reshapes the JTD evolution pathway through π-d orbital hybridization engineering. By constructing reduced graphene oxide/TMO heterointerfaces (rGO/MOx, M = Fe/Ni/Mn), localized 3d electrons are transformed into delocalized itinerant states, which (1) eliminate eg-band degeneracy via orbital repopulation and (2) establish an electron density buffer layer to neutralize lattice strain. This electronic regulation enables ultrafast Na+ diffusion kinetics (508.3 F g−1 at 1 A g−1 → 304.6 F g−1 at 20 A g−1) and near-zero lattice deformation (91.07% capacitance retention after 20,000 cycles). Synchrotron-based X-ray absorption spectroscopy and density functional theory calculations reveal that itinerant electron dynamics actively decouple the Mn3+ d4 electronic configuration from JTD triggering, leading to a dramatic suppression of octahedral distortion compared to the conventional MnO2. The proposed electron delocalization-to-lattice stabilization paradigm opens a universal route to design distortion-resistant electrodes for high-power energy storage systems. © 2025 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences

关键词： Manganese oxide

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Techniques for surface charge measurements and exploring contact electrification

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Friction 2025年第2期13卷 19-37页

作者： Shiquan Lin Chi Zhang Tianmin Shao Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China

Contact electrification(CE)is one of the most important physical phenomena within the realm of surface science,with a history spanning over 2,600 *** numerous experiments have been conducted to detect CE and theories regarding electron,ion,and material transfer have been proposed,the mechanism of CE remains a subject of ongoing debate and continues to intrigue scientists.A key issue in CE studies is accurately measuring the charge transfer in various *** development of charge transfer measurements has consistently led to a deeper understanding of *** this review,we explore the field of CEs,focusing on methods for measuring charge *** introduction of six experimental methods from macroscopic to microscopic and first-principles calculations for CE studies aims to promote their proper use and inspire the design of new ***,we highlight the shortcomings of the present research approach and provide a perspective on future methodological developments.

关键词： triboelectrification contact electrification(CE) charge density interfacial charge transfer measurement

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Hierarchical NiFe LDH/N-doped Co/nickel foam as highly active oxygen evolution reaction electrode for anion exchange membrane water electrolysis

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Nano Research 2025年第2期18卷 280-289页

作者： Jiansheng Wang Yongsheng Wang Xiaoxuan Guo Mengting Chen Jinjie Fang Xiaojie Li Wei Zhu Zhongbin Zhuang State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China PetroChina Shenzhen New Energy Research Institute Co. Ltd.Shenzhen 518054China

Anion exchange membrane water electrolyzers(AEMWEs)are emerging as a promising technology due to the high performance and low ***,the development of highly active and stable non-precious metal-based catalysts for the anodic oxygen evolution reaction(OER)remains a great *** this study,we present a top-down construction strategy for anode design,resulting in a hierarchical NiFe layered double hydroxide(LDH)/N-doped Co/nickel foam(NF)electrode synthesized via a hydrothermal-gas phase nitridation–electrodeposition *** electrode features NiFe LDH nanoplates grown on N-doped Co nanowires supported by nickel foam *** NiFe LDH/N-doped Co/NF electrode demonstrates exceptional performance,achieving a current density of 100 mA·cm^(-2) at a low overpotential of 262 mV with minimal attenuation of just 7 mV NiFe LDH/N-doped Co/NF RuO_(2)/NF NiFe LDH/N-doped Co/NF after 100 h of *** assembled into an AEMWE,the system requires only 1.63 V to achieve a current density of 1 A·cm^(-2),surpassing the performance of most reported *** N-doped Co nanowires are shown to enhance both activity and stability by increasing the electrode’s surface area and reinforcing the catalyst–support interaction.

关键词： water electrolysis oxygen evolution reaction hierarchical structure synergistic effect

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Detector array with digital data acquisition system for charged-particle decay studies

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Nuclear Science and Techniques 2025年第4期36卷 140-150页

作者： Hao Jian Xin-Xing Xu Kai-Long Wang Jia-Jian Liu Chao-Yi Fu Peng-Jie Li Yan-Yun Yang Guang-Xin Zhang Kang Wang Fang-Fang Duan Long-Hui Ru Guang-Shun Li Bing Ding Yun-Hua Qiang Cen-Xi Yuan Jun-Bing Ma Shi-Wei Xu Yu-Feng Gao Rui Fan Fan-Chao Dai Si-Xian Zha Hao-Fan Zhu Jin-Hai Li Shu-Lian Qin Zhi-Fang Chang Cheng Kong He-Xuan Yan Hao-Wei Xu Jia-Long Ning Bo-Ren Liu Jie Zhou Yu-Dong Chen Bo-Shuai Cai Yu-Ting Wang Hong-Yi Wu Zhi-Xuan Wang Dong-Sheng Hou Hu-Shan Xu Xiao-Hong Zhou Yu-Hu Zhang Meng Wang Zheng-Guo Hu Jenny Lee State Key Laboratory of Heavy Ion Science and Technology Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516003China Department of Physics The University of Hong KongHong KongChina Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Institute of Particle and Nuclear Physics Henan Normal UniversityXinxiang 453007China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China

A state-of-the-art detector array with a digital data acquisition system has been developed for charged-particle decay studies,includingβ-delayed protons,αdecay,and direct proton emissions from exotic proton-rich *** digital data acquisition system enables precise synchronization and processing of complex signals from various detectors,such as plastic scintillators,silicon detectors,and germaniumγ*** system's performance was evaluated using theβdecay of^(32)Ar and its neighboring nuclei,produced via projectile fragmentation at the first Radioactive Ion Beam Line in Lanzhou(RIBLL1).key measurements,including the half-life,charged-particle spectrum,andγ-ray spectrum,were obtained and compared with previous results for *** the implantation–decay method,the isotopes of interest were implanted into two doublesided silicon strip detectors,where their subsequent decays were measured and correlated with preceding implantations using both position and time *** detection system has potential for further applications,including the study ofβ-delayed charged-particle decay and direct proton emissions from even more exotic proton-rich nuclei.

关键词： β-delayed proton decay Double-sided silicon strip detector High-purity germanium detector Digital data acquisition system Implantation–decay correlation

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Low-temperature active soldering of 5A06-Al alloy and Ti-Cu-Ni alloy mesh-reinforced SAC305 composite solder: Interfacial bonding behavior and joint properties

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Journal of Materials Science and technology 2025年 235卷 313-323页

作者： Li, Dan Xi, Bangfu Xiao, Yong Song, Lizhi Zhang, Jian Luo, Dan Goodall, Russell School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Materials Science and Engineering The University of Sheffield SheffieldS1 3JD United Kingdom

Achieving reliable bonding is critical for low-temperature active soldering in Al alloys. In this study, a novel Ti-Cu-Ni alloy mesh-reinforced SAC305 composite solder was developed for active soldering of 5A06-Al alloy at 350 °C. Effects of soldering time on the microstructure and mechanical properties of joints were investigated, and the interfacial bonding mechanism of joints was analyzed. Results showed that the (Cu, Ni)6Sn5 phase was formed between alloy mesh and SAC305 solder in the active composite solder, while Ti atoms were uniformly released from the alloy mesh. Metallurgical products within joints mainly comprised (Cu, Ni)6Sn5 and Al3(Ni, Cu)2 phases, which developed with increasing soldering time. An amorphous Al2O3 layer and a Mg-containing layer were formed at the Al substrate/SAC305 solder interface. Mg atoms could enhance the charge transfer between Ti atoms and oxide film, attracting the diffusion of Ti atoms to oxide film. The oxide film removal processes relied on the synergistic impacts of Ti and Mg. The highest shear strength of joints reached 53.21 ± 0.91 MPa, exceeding previously reported properties for low-temperature active soldering by over 100 %. This exploration may provide insights into developing low-temperature active soldering technologies for Al alloys. © 2025

关键词： Titanium alloys

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Materials and devices for high‐density,high‐throughput micro‐electrocorticography arrays

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Fundamental Research 2025年第1期5卷 17-28页

作者： Yang Xie Yanxiu Peng Jinhong Guo Muyang Liu Bozhen Zhang Lan Yin He Ding Xing Sheng Department of Electronic Engineering Beijing National Research Center for Information Science and TechnologyInstitute for Precision MedicineLaboratory of Flexible Electronics TechnologyIDG/McGovern Institute for Brain ResearchTsinghua UniversityBeijing 100084China Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering The Key Laboratory of Advanced Materials of Ministry of EducationState Key Laboratory of New Ceramics and Fine ProcessingLaboratory of Flexible Electronics TechnologyTsinghua UniversityBeijing 100084China

The pursuit of precisely recording and localizing neural activities in brain cortical regions drives the development of advanced electrocorticography(ECoG)*** progress has led to the emergence of micro-ECoG(μECoG)devices with sub-millimeter *** review presents the current research status,development directions,potential innovations and applications of high-density,high-throughputμECoG ***,we summarize the challenges associated with accurately recording single or multiple neurons using existingμECoG devices,including passive multielectrode and active transistor ***,we focus on cutting-edge advancements in passiveμECoG devices by discussing the design principles and fabrication strategies to optimize three key parameters:impedance,mechanical flexibility,and ***,recent findings highlight the need for further research and development in active transistor arrays,including silicon,metal oxide,and solution-gated *** active transistor arrays have the potential to unlock the capabilities of high-density,high-throughputμECoG devices and overcome the limitations of passive multielectrode *** review explores the potential innovations and applications ofμECoG devices,showcasing their effectiveness for both brain science research and clinical applications.

关键词： Electrocorticography Micro-electrocorticography Flexible electronics Bioelectronics Neural electrode array

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A partially degradable composite consisting of Ti-Zr-Cu-Pd-Sn metallic glass and Fe-Mg alloy for orthopedic applications

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Acta Biomaterialia 2025年 198卷 514-529页

作者： Du, Peng Zuo, Kun Yan, Rongqiang Li, Kun Chen, Shilu Yuan, Bo Zhang, Liang Xie, Guoqiang Shenzhen518055 China Institute of Intelligent Manufacturing Technology Shenzhen Polytechnic University Shenzhen518055 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China School of Materials Science and Engineering Shandong University of Technology Zibo255000 China

Partially-degradable biomaterials refers to smart implants where biodegradable metals can gradually be replaced by newly growing bone or living tissues, and leave behind a porous inert metal skeleton that stably binds with the new bone tissue. In this research, a partially degradable composite was designed by integrating Ti-Zr-Cu-Pd-Sn metallic glass (MG) with designed Fe-Mg alloy using spark plasma sintering (SPS). The mechanical alloying technique successfully enabled the fusion of immiscible Fe and Mg, addressing the issues of Fe's slow degradation and Mg's rapid breakdown, while also minimizing potential fractures in the metal framework due to hydrogen gas evolution. The controlled degradation of Mg(Fe) promotes the formation of Ca-P compounds, enhancing the bioactivity of the Fe-Mg composite. This design endows the composite with plastic and ductile deformation under compression, providing a viable solution to the brittle fracture behaviour commonly associated with conventional bulk metallic glasses (BMGs). This advancement holds promise for aligning with the natural growth rate of human bone, further augmenting the bioactive properties and practical applications of the MG/Fe-Mg composite material. statement of significance: In this research, a partially degradable composite was designed by integrating Ti-Zr-Cu-Pd-Sn metallic glass (MG) with designed Fe-Mg alloy using SPS. The Fe-Mg alloy act as temporary space holders can gradually being replaced by newly formed bone, thus establishing a dynamic equilibrium between the biodegradation of the bio-metals and the inward growth of new bone. The degradation of Mg(Fe) promotes the formation of Ca-P compounds, enhancing the bioactivity of the composite. This design endows the composite with plastic deformation under compression, providing a viable solution to the brittle fracture behavior of conventional MGs. This advancement holds promise for aligning with the natural growth rate of human bone, further augmenting the

关键词： Magnesium alloys

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