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High Ion-Selectivity of Garnet Solid Electrolyte Enabling Separation of Metallic Lithium

Energy & Environmental Materials 2023年第6期6卷 236-242页

作者： Haitian Zhang Jialiang Lang Kai Liu Yang Jin Kuangyu Wang Yulong Wu Siqi Shi Li Wang Hong Xu Xiangming He Hui Wu Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 10084China School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine ProcessingTsinghua UniversityBeijing 10084China School of New Energy State Key Laboratory of Alternate Electrical Power System with Renewable Energy SourcesNorth China Electric Power UniversityBeijing 102206China School of Electrical Engineering Research Center of Grid Energy Storage and Battery ApplicationZhengzhou UniversityZhengzhou 450001China School of Materials Science and Engineering Shanghai University Shanghai 200444China

Ionic selectivity is of significant importance in both fundamental science and practical *** instance,an ion-selective material allows the passage of a particular kind of ions while blocking the others,which could be used for purification of ***,the Li-ion-selectivity of a garnet-type solid electrolyte is discussed by comparing the difference of activation energy between different ions migrating in *** high ion-selectivity is confirmed by harvesting high-purity metallic lithium(99.98 wt%)from low-lithium-purity sources(80 wt%)at a moderate temperature(190℃).This gives it huge potential in separating lithium with impurities especially alkali and alkali-earth *** cost of metallic lithium production is only 25%of the international lithium *** proposed electrochemical metallic lithium separating method is advantageous compared with the traditional process in terms of efficiency,safety,and cost.

关键词： ion separating ionic selectivity lithium metal solid electrolyte

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Cold-Test of The W-Band Nonperiodic Concentric Arc FW-SWS Based on The Beam-Wave Resynchronization Method 24

Cold-Test of The W-Band Nonperiodic Concentric Arc FW-SWS Ba...

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24th International Vacuum Electronics Conference, IVEC 2023

作者： Wen, Zheng Zhu, Fang Wang, Jian Luo, Jirun Zhang, Jun He, Juntao College of Advanced Interdisciplinary Studies National University of Defense Technology Changsha China Aerospace Information Research Institute Chinese Academy of Sciences Key Laboratory of Science and Technology on High Power Microwave Sources and Technologies Beijing China

ISBN: (纸本)9781665473217

Cold-test of the W-band nonperiodic concentric arc folded-waveguide slow-wave structure (FW-SWS) based on the beam-wave resynchronization method is presented in this paper. The scanning electron microscope result shows that the edge of the concentric arc FW-SWS is clear, where almost no cutting burr can be observed. Moreover, the measured |S11| is below -19.5 dB from 90 GHz to 104 GHz, and |S21| is in the range of -9.2 dB to -5.3 dB. Furthermore, the cold-test result demonstrates that when the bulk conductivity of copper is set as 4.2×107 S/m higher than the common value (2.25×107 S/m) in W-band, the simulated result can be the most consistent with the measured one, which indicates that surface roughness and finish of the fabricated FW-SWS is better than expectation. © 2023 IEEE.

关键词： Slow wave structures

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Metal-organic framework-derived porous carbon for the advanced aqueous zinc-ion hybrid capacitor

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Journal of Central South University 2024年第7期31卷 2268-2279页

作者： LIU Wei-fang HU Zi-han ZHANG Qi School of Chemistry and Chemical Engineering Hunan University of Science&TechnologyXiangtan 411201China Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China

Aqueous zinc ion hybrid capacitors(ZIHCs)are considered one of the most promising electrochemical energy storage systems due to their high safety,environmental friendliness,low cost,and high power ***,the low energy density and the lack of sustainable design strategies for the cathodes hinder the practical application of ***,we design the N and O co-doped porous carbon cathode by annealing metal-organic framework(ZIF-8).ZIF-8 retains the original dodecahedral structure with a high specific surface(2814.67 m^(2)/g)and I_(G)/I_(D) ratio of 1.0 during carbonization and achieves self-doping of N and O *** defect sites are introduced into the porous carbon to provide additional active sites for ion adsorption after the activation of carbonized ZIF-8 by KOH *** ZIHCs assembled with modified ZIF-8 as the cathode and commercial zinc foil as the anode show an energy density of 125 W∙h/kg and a power density of 79 W/*** addition,this ZIHCs device achieves capacity retention of 77.8%after 9000 electrochemical cycles,which is attributed to the diverse pore structure and plentiful defect sites of ZIF-8-800(KOH).The proposed strategy may be useful in developing high-performance metal-ion hybrid capacitors for large-scale energy storage.

关键词： zinc ion hybrid capacitor cathode metal-organic framework(ZIF-8) KOH activation

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Critical rate capability barrier by the(001)microtexture of a singlecrystal cathode for long lifetime lithium-ion batteries

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Journal of Materiomics 2022年第3期8卷 649-655页

作者： Xiaopei Zhu Lina Cheng Han Yu Feifei Xu Wei Wei Li-Zhen Fan Key Laboratory of New Energy Materials and Technologies Institute of Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083China Tianjin Guoan Mengguli New Materials Science&Technology Limit Corporation Tianjin301811China CITIC Guoan Mengguli Power Sources Technology Limit Corporation Beijing102200China

In practical pouch cell,LiNi0.5Mn0.3Co0.2O2/artificial graphite lithium ion battery using single-crystal LiNi0.5Mn0.3Co0.2O2(S-NMC532)as cathode can have excellent cycle ***,singlecrystal LiNi0.5Mn0.3Co0.2O2 inevitably suffers poor rate capability compared to the polycrystalline ***,we systematically studied the relationship between microstructural characteristics and the practical rate performance,as well as explored the impedance change during the cycling process in the pouch *** work shows that the(001)plane microtexture of the electrode surface structure is a critical barrier for rate *** backscatter diffraction(EBSD),electrochemical impedance spectroscopy(EIS)and distribution of relaxation times(DRT)are conducted on the *** analyses allow to conclude on the influence of the(001)plane microtexture on the electrode surface,which illustrates a diffusion resistance of lithium ions,and then,leading a high interfacial ***,this work confirms the main cause of the inferior rate capability of S-NMC532 and offers guidance for developing a battery with high rate and ultralong cycling life.

关键词： Lithium-ion batteries Single-crystal Failure mechanism Crystal orientation Microtexture

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An energy-saving photo-rechargeable lithium-ion battery based on lead-free hybrid perovskite

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science China Materials 2025年第4期68卷 1091-1099页

作者： Xiaojing Yin Guangran Di Ye Liu Guoqiang Wang Changhua Mi Yubo Kuang Xiaoqian Xiang Xin Sun Eran Edri Xiaojun Lv Meicheng Li State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of New EnergyNorth China Electric Power UniversityBeijing 102206China IlseKatz Institute for Nanoscale Science and Technology Department of Chemical EngineeringBen-Gurion University of the NegevBe'er-Sheva 8410501Israel

The development and utilization of clean energy have emerged as indispensable technologies within contemporary societal structures,and the development of photo-rechargeable lithium-ion batteries(PR-LIB)holds new promise for simultaneously eliminating solar energy volatility limitations and realizing battery *** this study,we present photoactive electrodes consisting of lead-free bismuth-based hybrid perovskite that combine the dual functions of photovoltaic conversion and energy *** was found that the PR-LIB based on this electrode increased the discharge capacity of the battery from 236.0 mA h g^(-1) in the dark to 282.4 mA h g^(-1)(a current density of 50 mA g^(-1))with a growth rate of 19.7%under light *** photogenerated carriers generated by the methylammonium bismuth iodide(MBI)effectively accelerated the charge transfer and lithium-ion diffusion,which contributed to the increase of the capacity and the decrease of the charge-transfer ***,the charging potential decreased by 0.1 V(6%reduction in input power)while the discharging potential increased by 0.1 V(11.8%increase in output power)under *** work demonstrates the potential of PR-LIB as an efficient,energy-saving battery in portable electronic devices.

关键词： lithium-ion batteries photo-rechargeable batteries hybrid perovskite photoactive electrodes energy conservation

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Electrospun Materials for Batteries Moving Beyond Lithium‑Ion Technologies

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Electrochemical Energy Reviews 2022年第2期5卷 211-241页

作者： Jie Wang Zhenzhu Wang Jiangfeng Ni Liang Li School of Physical Science and Technology Center for Energy Conversion Materials and Physics(CECMP)Jiangsu Key Laboratory of Thin FilmsSoochow UniversitySuzhou 215006JiangsuChina Light Industry Institute of Electrochemical Power Sources Suzhou 215699JiangsuChina

Innovation and optimization have shifted battery technologies beyond the use of lithium ions and fostered the demand for enhanced materials,which are vital factors determining the energy,power,durability,and safety of *** battery materials vary in their sizes,shapes,and morphology,and these have yet to meet the performance standards necessary to prevent deterioration in regard to the efficiency and reliability of beyond-lithium *** a versatile and feasible technique for producing ultrathin fibers,electrospinning has been extensively developed to fabricate and engineer nanofibers of functional materials for battery *** this review,the basic concepts and characteristics of beyond-lithium batteries are expounded,and the fundamentals of electrospinning are *** aim is to provide a guide to researchers going into this *** are placed on how electrospinning can address some of the key technical challenges facing beyond-lithium *** hope the knowledge presented in this work will stimulate the design of electrospun materials for future battery applications.

关键词： Electrospinning Electrospun material Beyond-lithium battery Nanofiber

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Investigation on E-Band High Efficiency Folded Wave-Guide Traveling Wave Tube 23

Investigation on E-Band High Efficiency Folded Wave-Guide Tr...

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23rd International Vacuum Electronics Conference, IVEC 2022

作者： Li, Fei Xiao, Liu Wang, Zicheng Sun, Yuhui Yi, Hongxia Shang, Xinwen Aerospace Information Research Institute Chinese Academy of Sciences Key Laboratory of Science and Technology on High Power Microwave Sources and Technologies Beijing100190 China

ISBN: (纸本)9781665443258

A new E-band high efficiency folded waveguide traveling wave tube (TWT) is investigated by numerical simulation and fabrication experiments. The results show that the modified folded waveguide circuit achieves higher coupling impedance than conventional folded waveguide circuit with lower phase velocity. Comparing with conventional folded waveguide TWT, this new folded waveguide TWT obtained electron efficiency of more than 10% with lowered operation voltage and shortened circuit length. Fabrication experiments also have been carried out and the feasibility of the new circuit technology is proved. © 2022 IEEE.

关键词： Traveling wave tubes

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Hierarchically mesoporous carbon spheres coated with a single atomic Fe-N-C layer for balancing activity and mass transfer in fuel cells

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Carbon Energy 2022年第1期4卷 1-11页

作者： Chengyong Shu Qiang Tan Chengwei Deng Wei Du Zhuofan Gan Yan Liu Chao Fan Hui Jin Wei Tang Xiao-dong Yang Xiaohua Yang Yuping Wu School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'anChina State Key Laboratory for Mechanical Behavior of Materials School of Material Science and EngineeringXi'an Jiaotong UniversityXi'anChina State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power SourcesShanghaiChina State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong UniversityXi'anChina College of Materials Science and Engineering Huaqiao UniversityXiamenChina Institute of Quantum and Sustainable Technology(IQST) School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiangChina State Key Laboratory of Materials-Oriented Chemical Engineering School of Energy Science and Engineering and Institute of Advanced MaterialsNanjing Tech UniversityNanjingChina

Novel cost-effective fuel cells have become more attractive due to the demands for rare and expensive platinum-group metal(PGM)catalysts for mitigating the sluggish kinetics of the oxygen reduction reaction(ORR).The high-cost PGM catalyst in fuel cells can be replaced by earth-abundant transition-metalbased catalysts,that is,an Fe-N-C catalyst,which is considered one of the most promising ***,the performance of the Fe-N-C catalyst is hindered by the low catalytic activity and poor stability,which is caused by insufficient active sites and the lack of optimization of the triple-phase interface for mass ***,a novel Fe–N–C catalyst consisting of mono-dispersed hierarchically mesoporous carbon sphere cores and single Fe atom-dispersed functional shells are *** synergistic effect between highly dispersed Fe-active sites and well-organized porous structures yields the combination of high ORR activity and high mass transfer *** half-wave potential of the catalyst in 0.1M H_(2)SO_(4) is 0.82 V versus reversible hydrogen electrode,and the peak power density is 812 mW·cm^(−2) in H_(2)–O_(2) fuel ***,it shows superior methanol tolerance,which is almost immune to methanol poisoning and generates up to 162 mW·cm^(−2) power density in direct methanol fuel cells.

关键词： fuel cell hierarchically mesoporous carbon spheres oxygen reduction reaction single‐atom catalysts

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The Hot Test of High-power Ku/K Dual-Band TWT 23

The Hot Test of High-power Ku/K Dual-Band TWT

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23rd International Vacuum Electronics Conference, IVEC 2022

作者： Yi, Hongxia Li, Fei Shang, Xinwen Xiao, Liu Aerospace Information Research Institute Chinese Academy of Sciences Key Laboratory of Science and Technology on High Power Microwave Sources and Technologies Beijing100190 China

ISBN: (纸本)9781665443258

Future military communication systems on mobile satellite uplink platforms such as ground-based high-mobility vehicles have strict constraints in size, weight, and power. The platforms require increasing data rate and bandwidth for video/imagery transmissions from small aperture terminals. In order to meet these demands, A Ku/K dual-band helix-traveling-wave tube is developed, which produces 351W minimum output power at Ku-band(0.5GHz bandwidth) and 258 W minimum output power at K-band (1.1GHz bandwidth). © 2022 IEEE.

关键词： Kurchatovium

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Cluster-Based Two-Level Mesh Routing Protocol for Wireless Sensor Network 4th

Cluster-Based Two-Level Mesh Routing Protocol for Wireless S...

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4th International Conference on Smart Vehicular technology, Transportation, Communication and Applications, VTCA 2021

作者： Zhang, Qi-yuan Sun, Bo Xu, Jian-ming He, Jian Mu, Ji-liang Science and Technology on Electronic Test and Measurement Laboratory North University of China Taiyuan030051 China China Academy of Space Technology Beijing100094 China State Key Laboratory of Space Power Technology Shanghai Institute of Space Power-Sources Shanghai200245 China

ISBN: (纸本)9789811640384

Wireless sensor networks (WSNs) have broad application scenarios in military and civilian fields. How to reduce the energy consumption of network communication and extend the life cycle of the network has always been a research focus of WSN. Clustering is one of the important methods to extend the network life cycle. However, the existing clustering routing protocol has room for further optimization of the connection mode between the common node and the cluster head node, the network topology structure and the communication mode between nodes. In this paper, a cluster-based two-level mesh (CTM) routing protocol for WSN is proposed, which supports common nodes to connect to the cluster head and communicate with any node in a multi-hop manner. It also specifies the topological structure of the two-level mesh and two communication modes. Finally, simulations on the OMNeT++ platform verify that the protocol can effectively reduce network and energy costs. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Routing protocols

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