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Postmortem ^(7)Li NMR analysis for assessing the reversibility of lithium metal electrodes in lithium metal batteries

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Journal of Energy Chemistry 2024年第7期94卷 430-440页

作者： Jaewon baek sunha Kim Hee-Tak Kim Oc Hee Han Department of Chemical&Biomolecular Engineering KAISTDaejeon 34141Republic of Korea Metropolitan seoul Center Korea Basic Science InstituteSeoul 03759Republic of Korea Graduate school of Analytical science&Technology Chungnam National UniversityDaejeon 34134Republic of Korea

Despite the proficiency of lithium(Li)-7 NMR spectroscopy in delineating the physical and chemical states of Li metal electrodes,challenges in specimen preparation and interpretation impede its *** this study,we conducted a comprehensive postmortem analysis utilizing ^(7)Li NMR,employing a stan-dard magic angle spinning probe to examine protective-layer coated Li metal electrodes and LiAg alloy electrodes against bare Li metal electrodes within Li metal batteries(LMBs).Our investigation explores the effects of sample burrs,alignment with the magnetic field,the existence of liquid electrolytes,and precycling on the ^(7)Li NMR *** contrasting NMR spectra before and after cycling,we identi-fied alterations in Li^(0) and Li^(+) signals attributable to the degradation of the Li metal *** NMR analyses decisively demonstrate the efficacy of the protective layer in mitigating dendrite and solid elec-trolyte interphase ***,we noted that Li*ions near the Li metal surface exhibit magnetic susceptibility anisotropy,revealing a novel approach to studying diamagnetic species on Li metal elec-trodes in *** study provides valuable insights and practical guidelines for characterizing distinct lithium states within LMBs.

关键词： NMR spectroscopy Lithium-7 Lithium metal battery Electrolyte Electrode-protective layer solid electrolyte interface Magnetic susceptibility anisotropy Lithium-metal NMR signal Diamagnetic^(7)Li NMR signal

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1.5 T MR用于急性缺血性卒中快速成像的可靠性

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国际医学放射学杂志 2019年第4期 498-498页

作者：任彦 M.s.Chung J.Y.Lee s.C.Jung s.baek W.H.shim J.E.Park Department of Radiology and Research Institute of Radiology Asan Medical Center University of Ulsan College of Medicine

摘要目的与常规MRI比较,研究1.5 T MR快速成像可否作为发现和定性急性缺血性脑卒中的可靠方法。方法本研究前瞻性地纳入2015年5月—2016年6月间共862

关键词：急性缺血性卒中快速成像 FLAIR

A solvent-Free Covalent Organic Framework single-Ion Conductor Based on Ion-Dipole Interaction for All-solid-state Lithium Organic Batteries

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Nano-Micro Letters 2024年第12期16卷 189-200页

作者： Zhongping Li Kyeong-seok Oh Jeong-Min seo Wenliang Qin soohyoung Lee Lipeng Zhai Changqing Li Jong-Beom baek sang-Young Lee Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-RoSeodaemun-GuSeoul 03722Republic of Korea school of Energy and Chemical Engineering Ulsan National Institute of Science and Technology(UNIST)50 UNIST-GilEonyang-EupUlju-GunUlsan 44919Republic of Korea Henan Key Laboratory of Functional salt Materials Center for Advanced Materials ResearchZhongyuan University of TechnologyZhengzhou 450007People’s Republic of China Department of Battery Conflation Engineering Yonsei University50Yonsei-RoSeodaemun-GuSeoul 03772Republic of Korea Department of Battery Engineering Yonsei University50Yonsei-RoSeodaemun-GuSeoul 03772Republic of Korea

single-ion conductors based on covalent organic frameworks(COFs)have garnered attention as a potential alternative to currently prevalent inorganic ion conductors owing to their structural uniqueness and chemical ***,the sluggish Li+conduction has hindered their practical ***,we present a class of solvent-free COF single-ion conductors(Li-COF@P)based on weak ion-dipole interaction as opposed to traditional strong ion-ion *** ion(Li+from the COF)-dipole(oxygen from poly(ethylene glycol)diacrylate embedded in the COF pores)interaction in the Li-COF@P promotes ion dissociation and Li+migration via directional ionic *** by this single-ion transport behavior,the Li-COF@P enables reversible Li plating/stripping on Li-metal electrodes and stable cycling performance(88.3%after 2000 cycles)in organic batteries(Li metal anode||5,5’-dimethyl-2,2’-bis-p-benzoquinone(Me2BBQ)cathode)under ambient operating conditions,highlighting the electrochemical viability of the Li-COF@P for all-solid-state organic batteries.

关键词： solid organic single-ion conductors solvent-free covalent organic frameworks All-solid-state Li organic batteries Ion-dipole interaction Pore functionalization

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Dual-logic-in-memory implementation with orthogonal polarization of van der Waals ferroelectric heterostructure

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InfoMat 2024年第2期6卷 107-117页

作者： Jingjie Niu sumin Jeon Donggyu Kim sungpyo baek Hyun Ho Yoo Jie Li Ji-sang Park Yoonmyung Lee sungjoo Lee sKKU Advanced Institute of Nanotechnology(sAINT) Sungkyunkwan UniversitySuwonRepublic of Korea Department of Nano science and Technology Sungkyunkwan UniversitySuwonRepublic of Korea Department of Electrical and Computer Engineering Sungkyunkwan UniversitySuwonRepublic of Korea IMEC HeverleeBelgium Department of Nano Engineering Sungkyunkwan UniversitySuwonRepublic of Korea

The rapid advancement of AI-enabled applications has resulted in an increasing need for energy-efficient computing ***-in-memory is a promising approach for processing the data stored in memory,wherein fast and efficient computations are possible owing to the parallel execution of reconfigurable logic *** this study,a dual-logic-in-memory device,which can simultaneously perform two logic operations in four states,is demonstrated using van der Waals ferroelectric field-effect transistors(vdW FeFETs).The proposed dual-logic-in-memory device,which also acts as a twobit storage device,is a single bidirectional polarization-integrated ferroelectric field-effect transistor(BPI-FeFET).It is fabricated by integrating an in-plane vdW ferroelectric semiconductor sns and an out-of-plane vdW ferroelectric gate dielectric material—CuInP_(2)s_(6).Four reliable resistance states with excellent endurance and retention characteristics were *** two-bit storage mechanism in a BPI-FeFET was analyzed from two perspectives:carrier density and carrier injection controls,which originated from the out-of-plane polarization of the gate dielectric and in-plane polarization of the semiconductor,*** conventional multilevel FeFETs,the proposed BPIFeFET does not require additional pre-examination or erasing steps to switch from/to an intermediate polarization,enabling direct switching between the four memory *** utilize the fabricated BPI-FeFET as a dual-logic-inmemory device,two logical operations were selected(XOR and AND),and their parallel execution was *** types of logic operations could be implemented by selecting different initial states,demonstrating various types of functions required for numerous neural network *** flexibility and efficiency of the proposed dual-logic-in-memory device appear promising in the realization of next-generation low-power computing systems.

关键词： ferroelectric field-effect transistor in-plane ferroelectricity logic-in-memory out-of-plane ferroelectricity

放射学杂志上下载和引用次数最多的文章:比较文献计量分析

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国际医学放射学杂志 2019年第1期 121-121页

作者： s.baek D.Y.Yoon K.J.Lim Y.K.Cho Y.L.seo E.J.Yun 王品箫 Department of Radiology Kangdong Seong-Sim HospitalHallym University College of Medicine

摘要目的评价和比较放射学期刊上下载最多、引用最多的文章的特点。方法选择网站上有下载和被引次数最多的文章列表的41种放射学期刊,确定了596篇下载最多的

关键词：放射学下载次数

放射学研究的特征和趋势:对2001年至2010年间发表于AJR和Radiology的原创性文章的分析

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国际医学放射学杂志 2012年第6期 580-580页

作者： K.J.Lim D.Y.Yoon Y.L.seo s.baek 魏璐郑晶晶 Department of Radiology Kangdong Seong-Sim HospitalHallym University College of Medicine445 Gil-dongKangdong-GuSeoul 134-701South Korea

摘要目的探讨2001年-2010年间发表于美国两家主流放射学期刊[American Journal of Roentgenology(AJR)和Radiology]的原创性文章的特征和趋势。材料与方法本研究为回顾性文献计量分析,不涉及人体试验,故无需经伦理审查委员会审查。

关键词：放射学 AJR Radiology 原创性文章特征和 2010

比较B超、增强CT及18F-FDG PET/CT对颈部的分化型甲状腺癌复发灶的检测效能,以手术病理结果作为参考标准

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国际医学放射学杂志 2012年第6期 611-611页

作者： Y.L.seo D.Y.Yoon s.baek Y.s.Rho E.J.Chung 李京津 Department of Radiology Kangdong Seong-Sim HospitalHallym University College of Medicine445 Gil-dongKangdong-guSeoul 134-701Korea

目的比较B超、增强CT及18F-FDGPET/CT在颈部复发性甲状腺癌的诊断效能。方法选取20例经手术病理证实患有分化型甲状腺癌(19例乳头状癌,1例髓样癌)并证实存在颈部复发病灶的病人。在进行进一步手术治疗之前,所有病人均在2个月内进行B超... 详细信息

目的比较B超、增强CT及18F-FDGPET/CT在颈部复发性甲状腺癌的诊断效能。方法选取20例经手术病理证实患有分化型甲状腺癌(19例乳头状癌,1例髓样癌)并证实存在颈部复发病灶的病人。在进行进一步手术治疗之前,所有病人均在2个月内进行B超、CT和PET/CT检查。对于每例病人,通过B超、CT及PET/CT对局部复发病灶进行逐层图像回顾性分析。影像学结果均与组织学检查结构进行对照作为参考标准。结果经手术证实在110个颈部结节中52个为复发病灶。超声的敏感度、特异度及精确度分别为69.2%、89.7%及80%;CT分别为63.5%、94.8%及80.0;PET/CT为53.8%、79.3%及67.3%。ROC分析结果表明B超比PET/CT对于检测肿瘤复发病灶具有更高的诊断效能。结论虽然在3种检查方法中未发现显著性差异,但是在评价分化型甲状腺癌颈部复发灶方面,超声和CT的敏感性和特异性均高于PET/CT。

关键词：甲状腺癌复发超声 CT 18F-FDGPET

冠状动脉CT血管成像评估无症状病人C-反应蛋白与冠状动脉斑块类型间的关系

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国际医学放射学杂志 2014年第6期 572-572页

作者： D.H.Yang J.W.Kang H.K.Kim J.Choe s.baek s.H.Kim 石彦姝 Department of Radiology and Research Institute of Radiology Asan Medical CenterUniversity of UlsanCollege of MedicineAsanbyeongwon-gil 86Seoul 138-736South Korea

摘要目的明确CT血管成像下所见冠状动脉斑块类型是否与C-反应蛋白有关。材料与方法本项回顾性研究经机构审查委员会批准,免除受试者知情同意。2 653例无症状受

关键词：冠状动脉反应蛋白斑块类型无症状血管成像病人 CT

头颈部恶性肿瘤病人PET/CT上腮腺偶发局灶性FDG摄取

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国际医学放射学杂志 2015年第2期 191-191页

作者： Y.L.seo D.Y.Yoon s.baek K.J.Lim E.J.Yun Y.K.Cho 赵芳 Department of Radiology Kangdong Seong-Sim Hospital Hallym University College of Medicine150 Seongan -ro Gangdong Gu Seoul 134-701 Korea

摘要目的评价非腮腺头颈部恶性肿瘤病人的18F-FDG PET/CT中出现腮腺局灶性病变的普遍性及其临床意义。方法对1 342例头颈部非腮腺恶性肿瘤病人采用18F-FDG进行

关键词：头颈部恶性肿瘤腮腺唾液腺 PET/CT FDG 病人局灶性 CT