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Prominent cycling reversibility and kinetics enabled by caTiO3 protective layer on Zn metal for aqueous Zn-ion batteries

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journal of Energy chemistry 2025年第1期100卷 245-258页

作者： gaeun lee Yong Nam Ahn seongjoon so chanwoo park jong-seong Bae Taehyun park Il Tae kim jaehyun hur school of chemical Biological and Battery Engineering Gachon University Seongnam Busan center Korea Basic Science Institute

Aqueous Zn-ion batteries （AZIBs） have received considerable attention owing to their various advantages such as safety,low cost,simple battery assembly conditions,and high ionic ***,they still suffer from serious problems,including uncontrollable dendrite growth,corrosion,hydrogen evolution reaction （hER） from water decomposition,electrode passivation,and unexpected *** creation of a uniform artificial nanocrystal layer on the Zn anode surface is a promising strategy for resolving these ***,we propose the use of a perovskite caTiO3（cTO） protective layer on Zn（cTO@Zn） as a promising approach for improving the performance of *** cTO artificial layer provides an efficient pathway for Zn ion diffusion towards the Zn metal because of the high dielectric constant （εr=180） and ferroelectric characteristics that enable the alignment of dipole moments and redistribute the Zn2+ions in the cTO *** avoiding the direct contact of the Zn anode with the electrolyte solution,the uneven dendrite growth,corrosion,parasitic side reactions,and hER are mitigated,while cTO retains its mechanical and chemical robustness during ***,cTO@Zn demonstrates an improved lifespan in a symmetric cell configuration compared with bare ***@Zn shows steady overpotential （～68 m V） for 1500 h at 1 mA cm-2/0.5 mA h cm-2,excelling bare ***,when paired with the V2O5-c cathode,the cTO@Zn//V2O5-c full battery delivers 148.4 mA h g-1（based on the mass of the cathode） after 300 *** study provides new insights into Zn metal anodes and the development of high-performance AZIBs.

关键词： Artificial layer Dielectric constant Zn metal anode Zinc aqueous battery

Experimental status of the hANBIT Facility

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Plasma science and Technology 2004年第4期6卷 2367-2370页

作者： s.j.Yoo m.kwon j.g.Bak k.choh I.s.choi j.h.choi j.W.choi A.c.England j.hong h.s.jeon h.g.jhang j.s.ju m.jung j.Y.kim s.s.kim W.h.ko k.Y.kwak m.c.kyum B.j.lee D.k.lee j.h.lee h.g.lee s.g.lee T.Lho h.k.Na B.h.park m.k.park D.c.seo s.h.seo j.h.Yeom j.s.Yoon k.I.You korea Basic science Institute Daejeon305-333Korea hanbit User group

hANBIT is a magnetic mirror confinement device. Recent physics experimentshave been mainly focused on identifying discharge characteristics and on getting stable plasmaproduction and operation modes, by using a 500 kW slot antenna system at a fixed RF frequency of 3.5mhz and varying discharge conditions such as fueling rate, RF power, and B-field intensity incentral cell. Two distinct operation modes are found to be very sensitive to the RF power as well asthe ratio of the RF frequency to the ion cyclotron frequency. A mhD interchange mode of m = - 1 isclearly observed and the stabilizing mechanism can be explained by the sideband coupling theory.

关键词： mirror discharge stabilization

Evaluation of spermatogenesis and fertility in F1 male rats after in utero and neonatal exposure to extremely low frequency electromagnetic fields

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Asian journal of Andrology 2005年第2期7卷 189-194,页

作者： m.k.chung s.j.lee Y.B.kim s.c.park D.h.shin s.h.kim j.c.kim Reproductive Toxicology Division Korea Institute of ToxicologyKorea Research Institute of Chemical TechnologyDaejeon 305-600Korea college of Veterinary medicine Chungbuk National UniversityCheongju 361-763Korea college of Veterinary medicine Kyungpook National UniversityDaegu 702-701Korea college of Veterinary medicine Chonnam National UniversityGwangju 500-757Korea

Aim:To determine whether in utero and neonatal exposure to a 60 hz extremely low frequency electromagnetic field (EmF) results in spermatotoxicity and reproductive dysfunction in the F1 offspring of ***:Age-matched, pregnant sprague-Dawley rats were exposed continuously (21 h/day) to a 60 hz EmF at field strengths of 0 (sham control),5,83.3 or 500 μT from day 6 of gestation through to day 21 of *** experimentally generated magnetic field was monitored continuously (uninterrupted monitoring over the period of the study) throughout the ***:No exposure-related changes were found in exposed or sham-exposed animals with respect to the anogenital distance,preputial separation,testis weight,testicular histology,sperm count,daily sperm production, sperm motility,sperm morphology and reproductive capacity of F1 ***:Exposure of sprague- Dawley rats to a 60 hz EmF at field strengths of up to 500 μT from day 6 of gestation to day 21 of lactation did not produce any detectable alterations in offspring spermatogenesis and fertility.

关键词： spermatogenesis electromagnetic fields prenatal exposure postnatal exposure rat

study of the Interface between steel Insert and Aluminum casting in EPc

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journal of materials science & Technology 2008年第1期24卷 60-64页

作者： k.h.choe k.s.park B.h.kang g.s.cho k.Y.kim k.W.lee m.h.kim A.Ikenaga s.koroyasu Advanced material Processing Team korea Institute of Industrial Technology IncheonKorea Department of materials Engineering korea University of Technology and Education ChoongnamKorea Department of materials science and Engineering Inha University IncheonKorea Department of metallurgy and materials science graduate school of Engineering Osaka Prefecture UniversityOsakaJapan Department of mechanical and Precision systems Teiko University UtsunomiyaJapan

The effective surface treatment method for steel insert composited with Al base metal by expendable pattern casting （EPc） process and the bonding interface between steel insert and Al base metal were *** was found that Zn plating on steel insert was effective on improving the bonding property between steel insert and Al base metal in EPc *** is thought to promote the formation of diffusion *** almost none content of Zn was observed in the boundary which had been plated on the steel insert.A diffusion layer consisting of Al,si and Fe was formed at the insert/alloy interface and its hardness was higher than the steel insert as matter of course Al base *** layer turned out to be intermetallic compounds of Al-si-Fe *** pouring temperature promoted the diffusion of Fe into Al alloy,so Fe content in intermetallic layers increased at higher pouring *** layer nearest to steel disappeared due to applied pressure.

关键词： Expendable pattern casting Insert casting Intermetallic compound Al-si-Fesystem

microstructural Evolution in Directionally solidified Ni-Base superalloy IN792+hf

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journal of materials science & Technology 2008年第1期24卷 110-114页

作者： s.m.seo I.s.kim j.h.lee c.Y.jo h.miyahara k.Ogi high Temperature materials Research group kims Changwon641-010Korea Dept.of metall.& mater.Eng. changwon Univ. Changwon641-773Korea Dept.of mater.sci.& Eng. kyushu Univ. Fukuoka819-0395Japan Oita National college of Technology Oita 870-0152Japan

microstructural evolution during directional solidification （Ds） of Ni-base superalloy IN792＋hf has been investigated with an emphasis on theγ′precipitates and mc-type *** quantitative image analyses revealed that the increase in the solidification rate up to 100μm/s at constant thermal gradient of 178 k/cm resulted in a fine and uniform distribution ofγ′*** relationship between the as-castγ′size and cooling rate was also determined for Ds IN792＋*** the mean time,the mc carbide size was found to be dependent both on the solidification rate and the s/L interface morphology while the area fraction of mc carbide was significantly influenced by the s/L interface morphology.

关键词： IN792 mc corbide gamma prime solidification rate

Design of small-area multi-bit antifuse-type 1 kbit OTP memory

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journal of central south University 2009年第3期16卷 467-473页

作者：李龙镇 lee j h kim T h jIN k h park m h hA P B kim Y h Department of Electronic Engineering Changwon National University Department of computer science and Technology Yanbian University

A multi-bit antifuse-type one-time programmable （OTP） memory is designed, which has a smaller area and a shorter programming time compared with the conventional single-bit antifuse-type OTP memory. While the conventional antifuse-type OTP memory can store a bit per cell, a proposed OTP memory can store two consecutive bits per cell through a data compression technique. The 1 kbit OTP memory designed with magnachip 0.18 μm cmOs （complementary metal-oxide semiconductor） process is 34% smaller than the conventional single-bit antifuse-type OTP memory since the sizes of cell array and row decoder are reduced. And the programming time of the proposed OTP memory is nearly 50% smaller than that of the conventional counterpart since two consecutive bytes can be compressed and programmed into eight OTP cells at once. The layout area is 214 μm× 327 μ,, and the read current is simulated to be 30.4 μA.

关键词： multi-bit OTP programming time antifuse memory data compression

Portable system for cWA Detection Using micro Array gas sensor

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稀有金属材料与工程 2006年第A3期35卷 124-128页

作者： j.h.kwak Y.T.Lim g.h.kim N.j.choi h.D.park g.h.Rue j.s.huh j.c.kim D.D.lee school of Electrical Engineering and computer science Kyungpook National UniversityDaegu 1370Korea Electronics and Telecommunications Research Institute Future Technology Research Division New Functional Information Devices TeamGajeongYuseong-GuDaejeon 161 Korea korea Electronics Technology Institute Yatap-DongBundang-GuSeongnam-SiGyeonggi-Do #68Korea Department of materials science and metallurgy Kyungpook National UniversityDaegu 1370Korea Department of chemical Engineering Kyungpook National UniversityDaegu 1370Korea

Biochemistry weapon is raising new tools of war and *** research is an experiment about portable system for cWAs (chemical warfare agents) detection using micro array gas *** were divided into four types such as blood, nerve,vesicant,and choking *** detect various cWAs,semiconductor thick film sensor array based on tin oxide was fabricated and their gas responses were *** temperature was range of 250℃to 350℃and gas concentration was range of 0.1μg/g to 10μg/*** array was measured as operating temperatures,concentrations for four simulant agents of *** parameters from results were carried out classification among cWAs through the principal component analysis (PcA).Also,classification of gases is studied using adaptive resonance theory (ART) that is one of neural network *** displayed using PDA system.

关键词： snO2 chemical warfare agents(cWAs) portable system ART array PcA

Power management unit chip design for automobile active-matrix organic light-emitting diode display module

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journal of central south University 2009年第4期16卷 621-628页

作者： kim j h park j h kim j h cAO T V lee T Y BAN h j YANg k kim h g hA P B kim Y h Department of Electronic Engineering Changwon National University 9 Sarim-Dong Changwon 641-773 Korea Denso Ps Electronics corporation 47 Seongsan-Dong Changwon 641-315 Korea

A power management unit （PmU） chip supplying dual panel supply voltage, which has a low electro-magnetic interference （EmI） characteristic and is favorable for miniaturization, is designed. A two-phase charge pump circuit using external pumping capacitor increases its pumping current and works out the charge-loss problem by using bulk-potential biasing circuit. A low-power start-up circuit is also proposed to reduce the power consumption of the band-gap reference voltage generator. And the ring oscillator used in the ELVss power circuit is designed with logic devices by supplying the logic power supply to reduce the layout area. The PmU chip is designed with magnachip＇s 0.25 μ high-voltage process. The driving currents of ELVDD and ELVss are more than 50 mA when a sPIcE simulation is done.

关键词： Dc-Dc converter AmOLED charge pumping power management unit (PmU) dual panel supply voltage

Present status of the ksTAR superconducting magnet system Development

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Plasma science and Technology 2004年第5期6卷 2445-2450页

作者： keeman kim h.k.park k.R.park B.s.Lim s.I.lee m.k.kim Y.chu W.h.chung s.h.Baek j.Y.cho h.Yonekawa A.chertovskikh Y.B.chang j.s.kim c.s.kim D.j.kim N.h.song k.P.kim Y.j.song I.s.Woo W.s.han D.k.lee Y.k.Oh k.W.cho j.s.park g.s.lee h.j.lee T.k.ko s.j.lee National NationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalNationalKorea Atomic Energy Research InstituteDaejeonRepublic of KoreaYonsei UniversitySeoulRepublic of KoreaYonsei UniversitySeoulRepublic of Korea Fusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science InstituteDaejeonRepublic of KoreaFusion R&D CenterKorea Basic Science

The mission of korea superconducting Tokamak Advanced Research (ksTAR)project is to develop an advanced steady-state superconducting tokamak for establishing a scientificand technological basis for an attractive fusion reactor. Because one of the ksTAR mission is toachieve a steady-state operation, the use of superconducting coils is an obvious choice for themagnet system. The ksTAR superconducting magnet system consists of 16 Toroidal Field (TF) coils and14 Poloidal Field (PF) coils. Internally-cooled cable-In-conduit conductors (cIcc) are put into usein both the TF and PF coil systems. The TF coil system provides a field of 3.5 T at the plasmacenter and the PF coil system is able to provide a flux swing of 17 V-sec. The major achievement inksTAR magnet-system development includes the development of cIcc, the development of a full-size TFmodel coil, the development of a coil system for background magnetic-field generation , theconstruction of a large-scale superconducting magnet and cIcc test facility. TF and PF coils are inthe stage of fabrication to pave the way for the scheduled completion of ksTAR by the end of 2006.

关键词： superconducting magnet ksTAR cIcc