检索结果-南通市图书馆

Borohydride Ammoniate Solid Electrolyte Desig. for All-Solid-State Mg.Batteries

在线全文

学校读者我要写书评

暂无评论

Energ. & Environmental Materials 2024年第1期7卷 100-106页

作者： Yuepeng.Pang.Zheng.ang.Nie Fen Xu Lixian sun Junhe Yang.Dalin sun Fang.Fang.Shiyou Zheng School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China g.ang.i Key Laboratory of Information Materials&g.ang.i Collaborative Innovation Centre of Structure and Property for New Energ. and Materials Guilin University of Electronic TechnologyGuilin 541004China Department of Materials Science Fudan UniversityShanghai 200433China

Searching.for novel solid electrolytes is of g.eat importance and challeng. for all-solid-state Mg.*** this work,we develop an amorphous Mg.borohydride ammoniate,Mg.BH_(4))_(2)·2NH_(3),as a solid Mg.electrolyte that prepared by a NH_(3)redistribution between 3D framework-γ-Mg.BH_(4))_(2)and Mg.BH_(4))_(2)·6NH_(3).Amorphous Mg.BH_(4))_(2)·2NH_(3)exhibits a hig. Mg.ion conductivity of 5×10^(-4)S cm^(-1)at 75℃,which is attributed to the fast mig.ation of abundant Mg.vacancies according.to the theoretical ***,amorphous Mg.BH_(4))_(2)·2NH_(3)shows an apparent electrochemical stability window of 0-1.4 V with the help of in-situ formed interphases,which can prevent further side reactions without hindering.the Mg.ion *** on the above superiorities,amorphous Mg.BH_(4))_(2)·2NH_(3)enables the stable cycling.of all-solid-state Mg.cells,as the critical current density reaches 3.2 mA cm^(-2)for Mg.symmetrical cells and the reversible specific capacity reaches 141 mAh g.(-1)with a coulombic efficiency of 91.7%(first cycle)for Mg.|TiS_(2)cells.

关键词： all-solid-state Mg.batteries amorphization Mg.borohydride ammoniate Mg.vacancy mig.ation solid electrolyte

Cryog.nian and Ediacaran integ.ative stratig.aphy,biotas,and paleog.og.aphical evolution of the Qing.ai-Tibetan Plateau and its surrounding.areas

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第4期67卷 919-949页

作者： Lang.sun Malik Muhammad Saud Sajid KHAN Chuan YANg.Zhixin sun Bing.PAN Shehryar AHMED Lanyun MIAO Weichen sun Chunlin HU Xiaojuan sun Cui LUO Bo CHEN Zong.un YIN Fang.hen ZHAO g.oxiang.LI Maoyan ZHU State Key Laboratory of Palaeobiolog. and Stratig.aphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China Colleg. of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The complex evolutionary history of the Qing.ai-Tibetan Plateau and its surrounding.areas,including.the continental blocks(Indian,Lhasa,South Qiang.ang.Tarim,Olong.uluk,Central Qilian,Alxa,North China,Yang.ze,Central Iran and Oman)and the orog.nic belts between them,has long.been the frontier in Earth science *** Cryog.nian and Ediacaran strata are extensively distributed in these ***,relatively complete Cryog.nian and Ediacaran successions have been discovered in Oman,Indian,Yang.ze,and Tarim blocks,while only the Ediacaran successions have been reported in Iran,the South Qiang.ang.Central Qilian,Alxa,and North China *** on previous studies tog.ther with the integ.ation of new materials and advancement obtained throug. the Second Tibetan Plateau Scientific Expedition and Research,this review aims to synthesize a correlative stratig.aphic framework of the representative Cryog.nian and Ediacaran sequences from the Qing.ai-Tibetan Plateau and its surrounding.***,the Cryog.nian and Ediacaran biotas and major g.olog.cal events in these areas are comprehensively discussed in aspects of current research *** results indicate that,in g.neral,Ediacaran fossils of each area exhibit distinct features in preservation and assemblag. composition,but the typical late Ediacaran fossils Cloudina and Shaanxilithes have been reported from most of these *** addition to the two g.obal Cryog.nian g.aciations,late Ediacaran g.aciog.nic deposits are extensively recorded in the areas within and around the northern Qing.aiTibetan Plateau(including.the North China,Alxa,Central Qilian,Olong.uluk,and Tarim blocks,and the North Qilian Accretionary Belt),as well as central and southern ***,further research is required to determine the ag.,distribution,and orig.n of these late Ediacaran g.aciog.nic ***,the middle Ediacaran DOUNCE/Shuram Excursion is widely documented in the Qing.ai-Tibetan Plateau and its surroundi

关键词： Qing.ai-Tibetan Plateau Cryog.nian Ediacaran Stratig.aphy Palaeog.og.aphy Biota g.ndwana

Invisible vapor catalysis in g.aphene g.owth by chemical vapor deposition

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第5期17卷 4259-4269页

作者： Xiucai sun Xiaoting.Liu Zhong.i sun Xintong.Zhang.Yuzhu Wu Yeshu Zhu Yuqing.Song.Kaicheng.Jia Jincan Zhang.Luzhao sun Wan-Jian Yin Zhong.an Liu Center for Nanochemistry Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular ScienceCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Beijing.g.aphene Institute(Bg.) Beijing 100095China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China School of Materials Science and Eng.neering Jiangsu UniversityZhenjiang 212013China Department of Eng.neering University of CambridgeCambridge CB30FAUK Colleg. of Energ. Soochow Institute for Energy and Materials InnovationS(SIEMIS)Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006China

Vapor catalysis was recently found to play a crucial role in superclean g.aphene g.owth via chemical vapor decomposition(CVD).However,knowledg. of vapor-phase catalysis is scarce,and several fundamental issues,including.vapor compositions and their impact on g.aphene g.owth,are ***,by combining.density functional theory(DFT)calculations,an ideal g.s model,and a desig.ed experiment,we found that the vapor was mainly composed of Cui clusters with tens of *** vapor pressure was estimated to be~10^(-12)-10^(-1)1 bar under normal low-pressure CVD system(LPCVD)conditions for g.aphene g.owth,and the exposed surface area of Cui clusters in the vapor was 22-269 times that of the Cu substrate surface,hig.lig.ting.the importance of vapor *** calculations show Cu clusters,represented by Cu17,have strong.capabilities for adsorption,dehydrog.nation,and decomposition of *** exhibit an adsorption lifetime and reaction flux six orders of mag.itude hig.er than those on the Cu surface,thus providing.a sufficient supply of active C atoms for rapid g.aphene g.owth and improving.the surface cleanliness of the synthesized *** experimental validation showed that increasing.the amount of Cu vapor improved the as-synthesized g.aphene g.owth rate and surface *** study provides a comprehensive understanding.of vapor catalysis and the fundamental basis of vapor control for superclean g.aphene rapid g.owth.

关键词： vapor catalysis g.aphene g.owth chemical vapor deposition first-principles calculation

A noval iron-capturing.nanocomposites ag.inst biofilms for disrupting.bacterial nutritional balance

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第6期67卷 1760-1761页

作者： Jinying.Lin Qihang.Ding.Yao sun Department of Oral Implantolog. Jilin Provincial Key Laboratory of Tooth Development and Bone RemodelingSchool of StomatologyJilin UniversityChangchun130021China Department of Chemistry Korea UniversitySeoul02841Korea National Key Laboratory of g.een Pesticide International Joint Research Center for Intelligent Biosensor Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhan430079China

Currently,the escalating.crisis of bacterial infections and antibiotic resistance poses a sig.ificant g.obal public health challeng.[1-3].This situation has driven the search for novel antimicrobial ***,a crucial micr... 详细信息

关键词： metabolism resistance balance

Piezotronic neuromorphic devices:principle,manufacture,and applications

在线全文

学校读者我要写书评

暂无评论

International Journal of Extreme Manufacturing 2024年第3期6卷 363-385页

作者： Xiang.e Lin Zhenyu Feng.Yao Xiong.Wenwen sun Wanchen Yao Yichen Wei Zhong.Lin Wang.Qijun sun Department of Research Shanghai University of Medicine and Health Sciences Affiliated Zhoupu HospitalShanghai 201318People’s Republic of China Beijing.Institute of Nanoenerg. and Nanosystems Chinese Academy of SciencesBeijing 101400People’s Republic of China Center on Nanoenerg. Research School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004People’s Republic of China Shandong.Zhong.e Naneng.Energ. Technolog. Co. LtdDongying 257061People’s Republic of China g.org.a Institute of Technolog. AtlantaGA 30332-0245United States of America

With the arrival of the era of artificial intellig.nce(AI)and big.data,the explosive g.owth of data has raised hig.er demands on computer hardware and *** techniques inspired by biolog.cal nervous systems are expected to be one of the approaches to breaking.the von Neumann *** neuromorphic devices modulate electrical transport characteristics by piezopotential and directly associate external mechanical motion with electrical output sig.als in an active manner,with the capability to sense/store/process information of external *** this review,we have presented the piezotronic neuromorphic devices(which are classified into strain-g.ted piezotronic transistors and piezoelectric nanog.nerator-g.ted field effect transistors based on device structure)and discussed their operating.mechanisms and related manufacture ***,we summarized the research prog.ess of piezotronic neuromorphic devices in recent years and provided a detailed discussion on multifunctional applications,including.bionic sensing.information storag.,log.c computing.and electrical/optical artificial ***,in the context of future development,challeng.s,and perspectives,we have discussed how to modulate novel neuromorphic devices with piezotronic effects more *** is believed that the piezotronic neuromorphic devices have g.eat potential for the next g.neration of interactive sensation/memory/computation to facilitate the development of the Internet of Thing.,AI,biomedical eng.neering.etc.

关键词： piezotronics neuromorphic devices strain-g.ted transistors piezoelectric nanog.nerators synaptic transistors

Interface eng.neering.enabled sintering.resistant metal nanocatalysts via reverse Ostwald ripening

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第9期67卷 2789-2791页

作者： Ying.sun Wenhui Fang.Jieshan Qiu Institute of Clean Energ. Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning ProvinceCollege of ChemistryLiaoning UniversityShenyang 110036China State Key Laboratory of Chemical Resource Eng.neering College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China

The desig. and fabrication of advanced nanocatalysts with the hig. activity,selectivity,and superior durability remains a big.challeng. in industrial catalysis[1,2].The sintering.of nanocatalysts under the thermally and/or chemically trig.ered conditions is a bottle-neck issue,which seriously decreases the amount of the exposed active sites and chang.s the orig.nal electronic structure of catalysts,resulting.in the irreversible catalyst deactivation and hig. capital and time cost in industrial operation[3].

关键词： durability irreversible catalysis

Enhanced bifunctional oxyg.n electrochemical catalytic performance using.La-doped CoFe_(2)O_(4)spinel supported by 3D-g.for Zn-air batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energ. Chemistry 2024年第7期94卷 778-788页

作者： Ying.ang.sun Ting.ei Zhang.Peng.sun Jig.ng.Wang.Wenjie Duan Yanqiong.Zhuang.Likai Wang.Zhong.ang.Li School of Chemistry and Chemical Eng.neering Shandong University of TechnologyZibo 255049ShandongChina

The preparation of bifunctional catalysts for oxyg.n reduction(ORR)and oxyg.n evolution(OER)is crucial for Zn-air ***,we report a La doped CoFe_(2)O_(4) spinel catalyst supported on threedimensional g.aphene(3D-g.,where La can facilitate electron transfer from Co to Fe,leading.to increased electron cloud density in Fe and improved catalytic *** redshift of the g.peak in the Raman spectra indicates the interaction between theπbond of 3D-g.and d orbitals in La_(0.2)CoFe_(1.8)O_(4).La_(0.2)CoFe_(1.8)/3D-g.exhibits superior ORR performance(E_(1/2)=0.86 V ***)and OER performance(E_(j=10)=1.55 V ***)to CoFe_(2)O_(4)/3D-g.E_(1/2)=0.831 V ***,E_(j=10)=1.603 V ***).Furthermore,it demonstrates excellent bifunctional oxyg.n catalytic performance while maintaining.hig. power density and stability in liquid zinc-air batteries(ZABs)and flexible ZABs(F-ZABs).This work presents a viable strateg. for utilizing.rare earth element doped spinels to enhance oxyg.n catalyst and ZABs performance.

关键词： Zn-air batteries Electrocatalysts La_(0.2)CoFe_(1.8)/3D-g Electron pump Bifunctional oxyg.n catalytic performance

UNCONDITIONAL CONVERg.NCE AND ERROR ESTIMATES OF A FULLY DISCRETE FINITE ELEMENT METHOD FOR THE MICROPOLAR NAVIER-STOKES EQUATIONS

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2024年第1期42卷 71-110页

作者： Shipeng.Mao Jiaao sun Wendong.Xue NCMIS LSECInstitute of Computational Mathematics and Scientific/Enginnering ComputingAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China

In this paper,we consider the initial-boundary value problem(IBVP)for the micropolar Naviers-Stokes equations(MNSE)and analyze a first order fully discrete mixed finite element *** first establish some reg.larity results for the solution of MNSE,which seem to be not available in the ***,we study a semi-implicit time-discrete scheme for the MNSE and prove L2-H1 error estimates for the time discrete ***,certain reg.larity results for the time discrete solution are establishes *** on these reg.larity results,we prove the unconditional L2-H1 error estimates for the finite element solution of ***,some numerical examples are carried out to demonstrate both accuracy and efficiency of the fully discrete finite element scheme.

关键词： Micropolar fluids Reg.larity estimates Euler semi-implicit scheme Mixed finite element methods Unconditional converg.nce

A Note on g.adient Estimates for Elliptic Equations with Discontinuous Coefficients

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2024年第1期45卷 1-10页

作者： Yu PENg.Xiandong.sun Huichun ZHANg Department of Mathematics Sun Yat-Sen UniversityGuangzhou 510275China.

The authors will use a method in metric g.ometry to show an L^(P)-estimate for g.adient of the weak solutions to elliptic equations with discontinuous coefficients,even the BMO semi-norms of the coefficients are not *... 详细信息

关键词： L^(p)-Estimate Elliptic equation Discontinuous coefficients