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Electrochemically stable lithium-ion and electron insulators(LEIs)for solid-state batteries

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Nano Research 2022年第2期15卷 1213-1220页

作者： Kai Pei so Yeon Kim Ju Li Frontier Institute of Science and Technology Xi'an Jiaotong UniversityXi'an 710049China Department of Materials Science and Engineering and Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA

Rechargeable solid-state Li metal batteries demand ordered flows of Li-ions and electrons in and out of solid structures,with repeated waxing and waning of Ubcc phase near contact interfaces which gives rise to various electro-chemo-mechanical *** have been approaches that adopt three-dimensional(3D)nanoporous architectures consisting of mixed ion-electron conductors(MIECs)to combat these ***,there has remained an issue of LiBcc nucleation at the interfaces between different solid components(e.g.,solid electrolyte/MlEC interface),which could undermine the interfacial bonding,thereby leading to the evolution of mechanical instability and the loss of ionic/electronic *** this regard,the present work shows that the Li-ion and electron insulators(LEIs)that are thermodynamically stable against LiBcc could combat such challenges by blocking transportation of charge carriers on the interfaces,analogous to dielectric layers in *** searched the ab initio database and have identified 48 crystalline compounds to be LEI candidates(46 experimentally reported compounds and 2 hypothetical compounds predicted to be stable)with a band gap greater than 3 eV and vanishing Li *** these compounds,those with good adhesion to solid electrolyte and mixed ion-electron conductor of interest,but are lithiophobic,are expected to be the most *** also extended the search to Na or K metal compatible alkali-ion and electron insulators,and identified some crystalline compounds with a property to resist corresponding alkali-ions and electrons.

关键词： electrochemical stability window stress fracture adhesion contact lithium metal anode

A Registry-Based Observational Study on the Maternal and Fetal Outcomes of COVID-19 Patients in Hong Kong,China

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Maternal-Fetal Medicine 2024年第3期6卷 156-163页

作者： Hillary HY Leung Teresa WL Ma Florrie NY Yu Meliza CW Kong Tsz Kin Lo Pauline PL so Wing-Cheong Leung Wendy Shu Ka Wang Cheung Sakita Moungmaithong Chi Chiu Wang Liona C.Poon Department of Obstetrics and Gynaecology The Chinese University of HongKongHong Kong 999077China Department of Obstetrics and Gynaecology Queen Elizabeth HospitalHong Kong 999077China Department of Obstetrics and Gynaecology United Christian HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Princess Margaret HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Tuen Mun HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Kwong Wah HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Pamela Youde Nethersole Eastern HospitalHong Kong 999077China Department of Obstetrics and Gynaecology Queen Mary HospitalHong Kong 999077China

Objective:To report the clinical maternal and fetal outcomes of pregnant women with coronavirus disease 2019(COVID-19),along with any associated pregnancy complications,in Hong Kong,China,and to assess the impact of COVID-19 vaccination on these ***:This prospective registry-based observational study included pregnant women who were recruited through convenient sampling and had a laboratory-confirmed severe acute respiratory syndrome coronavirus 2 infection with a cycle threshold(Ct)value result available on admission to eight local hospitals in Hong Kong,*** on clinical symptoms,laboratory results,medical treatments,delivery timing and mode,and pregnancy complications were extracted from the Hospital Authority’s electronic medical record ***,fetal,and pregnancy outcomes were compared between unvaccinated pregnant women with COVID-19 and those who had received at least one dose of COVID-19 vaccine before *** continuous variables and categorical variables were analyzed using the Mann-Whitney U test and the Pearson’s chi-squared test respectively.A P value less than 0.05 was considered statistically ***:A total of 164 pregnant women were included,of whom 78(47.56%)were ***-19 was diagnosed before 28 weeks’gestation in 30(18.29%),while 134(81.71%)were diagnosed at or after 28 weeks’***-two(37.80%)women received at least one dose of COVID-19 *** were no significant differences between vaccinated and unvaccinated groups in the time interval between COVID-19 diagnosis and delivery,the Ct value,and the gestational age at infection onset or delivery(P>0.05).The majority of women were symptomatic at diagnosis regardless of vaccination status 55(88.71%)in vaccinated group vs.78(76.47%)in unvaccinated group(P=0.052).Symptoms did not significantly differ between groups except for cough(62.90%vs.47.06%,P=0.049).The overall rate of severe COVID-19 in pregnant women was *** t

关键词： COVID-19 Maternal outcomes Fetal outcomes Pregnancy complications Severe COVID-19

Machine learning of metal-ceramic wettability

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Journal of Materiomics 2022年第1期8卷 195-203页

作者： so Yeon Kim Ju Li Department of Materials Science and Engineering and Department of Nuclear Science and Engineering assachusetts Institute of TechnologyCambridgeMA02139USA

The adhesion and wetting between metal and ceramic is a basic problem in materials science and *** example,past materials selection for metal-ceramic composites has relied on random trials and heuristics due to a limited understanding of their adhesion;the large chemical/structural variability that such interfaces can have hinders the identification of the governing *** based on literature data,we have developed a database with~1,000 experimentally measured wetting angles at different temperatures and atmospheric conditions,and come up with a model for the wettability of ionocovalent ceramics(ICs)by metals using a machine learning(ML)*** random forest model uses the testing temperature and~40 features generated based on the chemical compositions of the metal and the ceramic as predictors and exhibits strong predictive power with an R^(2) of~***,this model and the featurization code are integrated into a single computational pipeline to enable(1)predicting metal-IC wettability of interest and(2)high-throughput searching of ICs with the desired wettability by certain metals in the entire Inorganic Crystallographic Structure *** a demonstration of this pipeline,the wettability of a Li-ion and electron insulator(LEI),CaO,by molten Li is estimated and compared with ab initio molecular dynamics simulation *** ML pipeline can serve as a practical tool for methodical design of materials in systems where certain metalceramic wettability is desired.

关键词： Metal-ceramic wettability Wetting angle Machine learning High-throughput screening solid-state batteries

New Evidence for a Cretaceous Age for a Mesozoic Nonmarine Bivalve Assemblage from Paekto-dong, Sinuiju City, The Democratic People’s Republic of Korea

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Acta Geologica Sinica(English Edition) 2019年第6期93卷 1607-1613页

作者： CholGuk WON KwangSik so SuHyang JON Department of Paleontology Faculty of Geology Kim Il Sung University

The Sinuiju Formation in Paekto-dong,Sinuiju City in the Democratic People's Republic of Korea has yielded Mesozoic nonmarine bivalve fossils,which is the first occurrence of such in the *** on these fossil specimens,a new Cretaceous bivalve assemblage,the Arguniella yanshanensis-Sphaerium anderssoni Assemblage is *** assemblage includes Arguniella yanshanensis,*** and Sphaerium anderssoni and can be compared with the Jehol *** age of the Sinuiju Formation is also clarified and on the basis of the bivalves and the presence of a Eosestheria–Ephemeropsis–Lycoptera(E–E–L)assemblage,the formation is not Upper Jurassic,but Lower Cretaceous in age.

关键词： biostratigraphy nonmarine bivalves Sinuiju Formation Early Cretaceous DPRK

Palladium-Catalyzed Desulfinative Cross-Coupling of Polyhalogenated Aryl Triflates with Aryl Sulfinate Salts:Inversion of Traditional Chemoselectivity

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Chinese Journal of Chemistry 2023年第8期41卷 909-914页

作者： Miao Wang On Ying Yuen Chau Ming so State Key Laboratory of Chemical Biology and Drug Discovery and Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityKowloonHong KongChina Henan Key Laboratory of Function-Oriented Porous Materials College of Chemistry and Chemical EngineeringLuoyang Normal UniversityLuoyangHenan471934 China The Hong Kong Polytechnic University Shenzhen Research Institute ShenzhenGuangdong518057 China

Comprehensive Summary This paper presents the first general examples of palladium-catalyzed desulfinative cross-coupling reaction of polyhalogenated aryl triflates with aryl sulfinate salts showing an inversion of the conventional reactivity order of C-Br>C-Cl>*** catalyst system,comprising of Pd(OAc)_(2)and tBuPhSelectPhos,exhibited excellent catalytic reactivity and chemoselectivity toward this *** reaction had a wide range of substrate scopes and provided a simple and efficient method for the construction of functionalized biaryl ***,the C-H···Pd interaction from the methine hydrogen of the C2-cyclohexyl group of the indolyl phosphine ligand with the Pd center may contribute a key factor in reactivity and *** with density functional theory(DFT)calculations,the results revealed that the oxidative addition step in this reaction was a controlling-chemoselectivity step.

关键词： Palladium Phosphane ligands IChemoselectivity Desulfurization Polyhalogenated aryl triflates

Contributions of the Secondary Jet to the Tangential Velocity Distribution and to the Collection Efficiency of the Fixed Guide Vane Type Axial Flow Cyclone Dust Collector

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Journal of Thermal Science 2015年第6期24卷 503-509页

作者： Akira Ogawa Hideki Anzou so Yamamoto Mituru Shimagaki Tokyo Japan

In order to control the maximum tangential velocity V?m(m/s)of the turbulent rotational air flow and the collection efficiencyηc(%)using the fly ash of the mean diameter X R50=5.57?m,two secondary jet nozzles were installed to the body of the axial flow cyclone dust collector with the body diameter D1=*** in order to estimate V?m(m/s),the conservation theory of the angular momentum flux with Ogawa combined vortex model was *** comparisons of the estimated results of V?m(m/s)with the measured results by the cylindrical Pitot-tube were shown in good *** also the estimated collection efficienciesηcth(%)basing upon the cut-size Xc(?m)which was calculated by using the estimated V?m(m/s)and also the particle size distribution R(Xp)were shown a little higher values than the experimental results due to the re-entrainment of the collected *** best method for adjustment ofηc(%)related to the contribution of the secondary jet flow is principally to apply the centrifugal effect?c(1).Above stated results are described in detail.

关键词： Axial Flow Cyclone Dust Collector Maximum Tangential Velocity Cut-Size Particle Size Distribution Collection Efficiency Reynolds number Centrifugal Effect

Porous Mixed Ionic Electronic Conductor Interlayers for solid-State Batteries

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Energy Material Advances 2021年第1期2021卷 175-189页

作者： so Yeon Kim Ju Li Department of Materials Science and Engineering and Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA

Rechargeable solid-state batteries(SSBs)have emerged as the next-generation energy storage device based on lowered fire hazard and the potential of realizing advanced battery chemistries,such as alkali metal ***,ceramic solid electrolytes(SEs)generally have limited capability in relieving mechanical stress and are not chemically stable against body-centered cubic alkali metals or their alloys with minor solute elements(β-phase).Swelling-then-retreating ofβ-phase often causes instabilities such as SE fracture and corrosion as well as the loss of electronic/ionic contact,which leads to high charge-transfer resistance,short-circuiting,*** challenges have called for the cooperation from other classes of materials and novel nanocomposite architectures in relieving stress and preserving essential contacts while minimizing detrimental *** this review,we summarize recent progress in addressing these issues by incorporating other classes of materials such as mixed ion-electron conductor(MIEC)porous interlayers and ion-electron insulator(IEI)binders,in addition to SE and metals(e.g.,β-phase and current collectors)that are the traditional SSB *** particular,we focus on providing theoretical interpretations on how open nanoporous MIEC interlayers manipulateβ-phase deposition and stripping behavior and thereby suppress such instabilities,referring to the fundamental thermodynamics and kinetics governing the nucleation and growth of theβ-*** review concludes by describing avenues for the future design of porous MIEC interlayers for SSBs.

关键词： alkali metals solid

Laparoscopic surgery for gastric cancer:Current status and future direction

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Chinese Journal of Cancer Research 2021年第2期33卷 133-141页

作者： so Hyun Kang Hyung-Ho Kim Department of Surgery Seoul National University Bundang HospitalSeongnam 13620Republic of Korea Department of Surgery Seoul National University College of MedicineSeoul 03080Republic of Korea

Gastric cancer is still a major cause of death *** laparoscopic gastrectomy(LG)has gained evidence as a standard treatment for early gastric cancer in the distal stomach,there are still concerns regarding its application for gastric cancer in the upper stomach and advanced gastric ***,LG has shown to have faster recovery,shorter hospital stay,less pain,and less blood loss in many retrospective and prospective *** application of LG has now extended from conventional radical gastrectomy to novel approaches such as function-preserving gastrectomy and sentinel-node navigated *** on the use of laparoscopy in treatment for stage IV gastric cancer are rare,but show that there may be some roles of LG in selected *** the development of new laparoscopic tools that augment human ability,the future of LG should move on from proving non-inferiority to demonstrating superiority compared to the traditional open gastrectomy.

关键词： Laparoscopy stomach neoplasm minimally invasive surgical procedures

LETTER FROM THE EDITORS-IN-CHIEF

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Neural Regeneration Research 2019年第1期14卷 5-6页

作者： Kwok-fai so Xiao-Ming Xu Editors-in-Chief.

In the past 11 years, Neural Regeneration Re- search （NRR） has evolved to become a frequent- ly cited journal in the field, receiving an impact factor that reflects the dedication and expertise of our editors and reviewers. In 2017, the jour- nal received an Impact Factor of 2.234, placing it in quartile 3 of neuroscience journals. We would like to take this opportunity to thank all contributors who have made this success possi- ble： our Editorial Board team, who always have supported and helped the journal＇s maturation; our reviewers, who have provided thoughtful critiques in a timely manner; our readers, who have deemed NRR papers to be of high enough quality to be cited; and last.

关键词：影响因素神经科学专家知识杂志评论 nal