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Electrochemical performance of li_(2)O-V_(2)O_(5)-SiO_(2)-B_(2)O_(3) glass as cathode material for lithium ion batteries

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Journal of Materiomics 2019年第4期5卷 663-669页

作者： En-Lai Zhao Shi-Xi Zhao Xia Wu jing-wei li Lu-Qiang Yu Ce-Wen Nan Guozhong Cao Graduate School at Shenzhen Tsinghua UniversityShenzhen518055China School of Materials Science and Engineering Tsinghua UniversityBeijing100084China Department of Materials Science and Engineering University of WashingtonSeattleWA98195-2120United States

A series of 20li_(2)O-30V_(2)O_(5)-(50-x)SiO_(2)-xB_(2)O_(3)(mol.%)(x=10,20,30,40)glasses were prepared by the traditional melt-quenching *** amorphous nature of the glasses was determined by XRD,DSC and TEM *** measurement revealed the functional group of obtained *** EDS results confirmed the presence and uniform distribution of elements in the glasses.20li_(2)O-30V_(2)O_(5)-40SiO_(2)-10B_(2)O_(3)(LVSB10)sample with the highest V^(4+) ratio exhibited the best cycling *** order to further improve cycling stability of LVSB10 sample,ball milling was employed to reduce the particle *** ball milled LVSB10 sample(LVSB10-b)showed an improved first discharge capacity,cycling stability and rate *** measurements showed that ball milling can effectively decrease charge transfer impedance and facilitate li^(+) ion *** work provides a new way to explore a new type of cathode materials for lithium ion batteries.

关键词： lithium ion battery Cathode materials li_(2)O-V_(2)O_(5)-SiO_(2)-B_(2)O_(3)glass Electrochemical performance

Room-temperature thermoelectric materials: Challenges and a new paradigm

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Journal of Materiomics 2022年第2期8卷 427-436页

作者： Zhijia Han jing-wei li Feng Jiang Jiating Xia Bo-Ping Zhang jing-Feng li weishu liu The Beijing Municipal Key Laboratory of New Energy Materials and Technologies School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices Southern University of Science and TechnologyShenzhenGuangdong518055China

Room-temperature thermoelectric materials provide promising solutions for energy harvesting from the environment,and deliver a maintenance-free power supply for the internet-of-things(IoTs).The currently available Bi_(2)Te_(3) family discovered in the 1950s,still dominates industrial applications,however,it has serious disadvantages of brittleness and the resource shortage of tellurium(1×10^(-3) ppm in the earth's crust).The novel Mg_(3)Sb_(2) family has received increasing attention as a promising alternative for room-temperature thermoelectric *** this review,the development timeline and fabrication strategies of the Mg 3 Sb 2 family are ***,an insightful comparison between the crystal-linity and band structures of Mg_(3)Sb_(2) and Bi_(2)Te_(3) is *** outlook is presented to discuss challenges and new paradigms in designing room-temperature thermoelectric materials.

关键词： Thermoelectric materials Mg_(3)Sb_(2) Bi_(2)Te_(3) Chemical bond engineering

The Science Operations and Data Center (SODC) of the ASO-S mission

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Research in Astronomy and Astrophysics 2019年第11期19卷 103-109页

作者： Yu Huang Hui li wei-Qun Gan You-Ping li Jiang-Tao Su Yuan-Yong Deng li Feng Yang Su wei Chen Shi-Jun Lei Ying li Yun-Yi Ge Ying-Na Su Si-Ming liu jing-jing Zang Zun-Lei Xu Xian-Yong Bai jing-wei li Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210034China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

A ground data analysis center is very important to the success of a *** introduce the Science Operations and Data Center(SODC)for the ASO-S mission,which consists of a scientific operation subcenter,a data management subcenter,a data analysis subcenter and a user service *** mission planning process,instrument observation modes and the data volume are *** describe the data flow and processing procedures from spacecraft telemetry to high-level science data,and the long-term archival as *** data policy and distributions are also briefly introduced.

关键词： space vehicles:instruments methods:data analysis techniques:image processing

Aerodynamic and trajectory characteristics of a typical mortar projectile with a deflectable nose

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Defence Technology（防务技术） 2019年第5期15卷 758-767页

作者： Yu-ming Ren Shu-shan Wang jing-wei li Xun-cheng Guo Yue-song Mei State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China Beijing Zhongheng Tianwei Force Defence Science and Technology limited Company Beijing 100081China

Deflectable nose control is a new trajectory correction *** this paper,the aerodynamic and trajectory characteristics of a typical mortar projectile with a deflectable nose are investigated with respect to its flight *** the method of wind tunnel testing,the aerodynamic coefficients of four kinds of mortar models were measured under the conditions of different angles of attack from-10°to 10°and Mach numbers from 0.3 to *** on the aerodynamic coefficients,the trajectory ranges at different nose deflection angles and times were ***,a trajectory optimization was performed by reducing the static *** results and discussions show that the nose deflection provided limited lift,while the pitching moment varied *** mortar obtained the extended flight range and trajectory correction ability with nose deflection.

关键词： Nose deflection Aerodynamic characteristics Wind tunnel test Trajectory simulation

A sound velocity method for determining isobaric specific heat capacity

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InfoMat 2022年第12期4卷 103-111页

作者： Jun Pei Hezhang li Hua-Lu Zhuang Jinfeng Dong Bowen Cai Haihua Hu jing-wei li Yilin Jiang Bin Su li-Dong Zhao jing-Feng li State Key Laboratory of New Ceramics and Fine Processing School of M aterials Science and EngineeringTsinghua UniversityBeijngPeople's Republic of China National Institute for Materials Science(NIMS) TsukubaJapan Schoo of Materials Science and Engineering Beihang UniversityBejingPeople's Republic of China

Isobaric specific heat capacity(Cp)is an important parameter not only in physics but also for most *** accurate measurement is particularly critical for performance evaluation of thermoelectric materials,but the experiments by differential scanning calorimetry(DSC)often lead to large uncertainties in the measurements,especially at elevated *** this study,we propose a simple method to determine Cp by measuring the sound velocity(υ)based on lattice vibration and expansion *** relative standard error of theυis smaller than 1%,showing good accuracy and *** calculated Cp at elevated temperature(>300 K)increases slightly with increasing temperature due to the lattice expansion,which is more reasonable than the Dulong–Petit value.

关键词： heat capacity sound velocity thermoelectric

The microwave absorption of ceramic-cup microwave ion source

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Nuclear Science and Techniques 2000年第3期11卷 155-161页

作者： liU lin-Mao, jing Shi-wei, li Wen-Sheng, GU li (Physics Department, foe Northeast Normal University, Changchun 130024) 东北师范大学吉林长春 130024

An experiment system of ceramic-cup microwave ion source has been built here. Its microwave absorption efficiency as a function of the magnetic field and the pressure is presented. When the microwave incident power is 300-500W the microwave absorption efficiencies are more than 90% if the system is optimized and the magnetic field at the microwave window is 0.095T.

关键词：微波离子源中子管陶瓷材料微波吸收效率电子回旋加速器

Robust tantalum tuned perovskite oxygen electrode for reversible protonic ceramic electrochemical cells

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Rare Metals 2024年第7期43卷 3055-3065页

作者： Yu-Shi Feng Yu Shen Fang Wang Chuan Tian Qin-Yi Hu Qian Duan jing-wei li Di Bao School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China Zhongshan Institute of Changchun University of Science and Technology Zhongshan528437China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchun 130022China Key Laboratory of Preparation and Applications of Environmental Friendly Materials Ministry of EducationJilin Normal UniversityChangchun 130103China

Perovskite oxides with diverse composition and structure have exhibited grand advances in boosting the oxygen reduction and evolution reaction(ORR/OER),which are essential for the reversible protonic ceramic electrochemical cell(R-PCEC)toward the sustainable hydrogen production and ***,enhancement of their activity and stability remains ***,we develop the Ta-regulated BaCo_(0.7)Fe_(0.3)O_(3-δ)perovskite oxygen electrode(Ba(Co_(0.7)Fe_(0.3))_(1-x)Ta_xO_(3-δ))with abundant oxygen defects and achieve the simultaneous enhancement in the electrocatalytic activity and stability toward ORR and ***-fabricated R-PCEC with(Ba(Co_(0.7)Fe_(0.3))_(0.9)Ta_(0.1)O_(3-δ))(BCFT10)oxygen electrode performs high power density of 1.47 W·cm^(-2)at 650℃in fuel cell mode,and the current density is up to-2.11 A·cm^(-2)at 1.4 V at 650℃in electrolysis mode,as well as the good stability in both the fuel cell and electrolysis ***,the cell also demonstrates a stable cycling operation between fuel cell and electrolysis mode,suggesting a great potential of BCFT10 as oxygen electrode material for R-PCECs.

关键词： Reversible protonic ceramic electrochemical cells Perovskite oxide Oxygen electrode Ta element doping Oxygen defects

Nanocavity enriched CuPd alloy with high selectivity for CO_(2) electroreduction toward C_(2)H_(4)

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Rare Metals 2024年第4期43卷 1513-1523页

作者： Ze-Yu Zhang Hai-Bin Wang Fei-Fei Zhang jing-wei li Xin-Zhuo Hu Si-wei Yan Yi-Ming Bai Xun Zhang Gu-Rong Shen Peng-Fei Yin jing Yang Cun-Ku Dong jing Mao Hui liu Xi-Wen Du Institute of New-Energy Materials School of Materials Science and EngineeringTianjin UniversityTianjin300350China

Electrocatalysis of CO_(2)reduction reaction is an effective way to convert CO_(2)into high value-added products,but the selectivity of Cu-based catalysts for C2+products needs to be improved due to the high energy barrier of C-C ***,a viable catalyst design strategy to decrease energy barrier of C-C coupling should be put ***,a nanocavity-enriched CuPd single atom alloy(CuPd SAA)catalyst is designed to promote CC coupling *** faradaic efficiency of CuPd SAA for ethylene and C_(2+)reaches 75.6%and 85.7%at-0.7 V versus reversible hydrogen electrode(RHE),*** on the results given by in situ characterization,the porous hollow structure dramatically increases the ratio of the linear-bond*CO,thus enhancing the faradaic efficiency for *** functional theory(DFT)calculation reveals that the Pd doping can regulate the electronic structure of neighboring Cu atoms to decrease the energy barrier of C-C coupling,further improving the faradaic *** work provides a new idea for designing catalyst with high selectivity for ethylene.

关键词： Adsorption configuration C-C coupling CO_(2) electrocatalysis Ethylene Single atom alloy

One-step controlled electrodeposition nickel sulfides heterointerfaces favoring the desorption of hydroxyl groups for efficient hydrogen generation

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Rare Metals 2024年第9期43卷 4377-4386页

作者： Ru-Chun li Xin-Yue Zhang Ze-Yue Qu Feng-Yi liu Quan-Qing Xu Zhao-Xia Hu jing-wei li Mohamed-Nawfal Ghazzal Jin-li Yu Faculty of Chemistry and Chemical Engineering Yunnan Normal UniversityKunming 650500China Foshan Gaoke Hechuang Technology Co. Ltd.Foshan 528200China School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Universite Paris-Saclay UMR 8000 CNRSInstitut de Chimie PhysiqueOrsay 91405France Department of Chemistry City University of Hong KongHong Kong 999077China

The heterointerface engineering involving different components or phases represents a desirable strategy for enhancing the sluggish kinetics of hydrogen evolution reaction(HER).However,constructing desired heterointerfaces and elucidating the reaction mechanisms on the interface remains a considerable *** this work,we propose a straightforward electrochemical synthesis strategy to prepare the nickel sulfide-based heterointerfaces for *** mechanism of electrochemical synthesis is revealed,wherein metal-thiourea species can be formed at the cathode potential and subsequently oxidized to nickel sulfides at the anode *** this mechanism,a range of nickel sulfides,including NiS,Ni_(3)S_(2)/NiS,Ni/Ni_(3)S_(2)and Ni_(3)S_(2),have been successfully synthesized by tuning the potential range of cyclic *** these,the obtained Ni_(3)S_(2)/NiS@CC(CC:carbon cloth)exhibits the smallest overpotential of84 mV at 10 mA·cm^(-2)and high *** calculations further reveal that the combination of NiS and Ni_(3)S_(2)induces electron redistribution at the interface,and thus the Volmer process is effectively promoted with faster water dissociation and OH desorption ***,the simplicity method coupled with a clear synthesis mechanism and outstanding HER performance highlights its promising potential for practical applications.

关键词： Hydrogen evolution reaction Heterointerfaces OH desorption kinetics Electrochemical synthesis