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Prominent cycling reversibility and kinetics enabled by CaTiO_(3) 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 Biologicaland Battery EngineeringGachon UniversitySeongnamGyeonggi 13120Republic of Korea Busan Center Korea Basic Science InstituteBusan 46742Republic of Korea

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 CaTiO_(3)(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 Zn^(2+)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 V_(2)O_(5)-C cathode,the CTO@Zn//V_(2)O_(5)-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： CaTiO_(3) Artificial layer Dielectric constant Znmetal anode Zinc aqueous battery

Structural,Sintering and Electrical Properties of Cr-doped La_(0.6)Sr_(0.4)Cr_xFe_(1-x)O_(3-δ)(x=0.10,0.20) Oxides

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Journal of Materials Science & Technology 2012年第7期28卷 654-660页

作者： LinlinZhu jong Pyo Kim sou Hwan Son Jung Hoon park State Key SLaboratory of Catalysis.Dalian Institute of Chemical Physics Chinese~Academy of Sciences Dalian 116023 China Greenhouse Gas Research Center Climate Change Technology Research Division Korea Institute of Energy ResearchDaejeon 305-343 Korea College of Chemistry and Materials Science Liaoning University of Petroleum and Chemical Technology Fushun113001 China

The perovskite Cr-doped La0.6Sr0.4CrxFe1-xO3-δ （x=0.10, 0.20） oxides were synthesized via the citrate gel method. The perovskite forming of the Lao.6Sr0.4CrxFel-xO3-δ （x=0.10, 0.20） oxides were studied by ther- mogravimetric analysis （TG）, differential scanning calorimetry （DSC）, and X-ray diffraction （XRD）. Structural and chemical stability under H2-containing helium atmospheres of Lao.6Sro.4CrxFel-xO3-δ （x=0.10, 0.20） were investigated by TG and XRD. The sintering microstructures of the perovskite Lao.6Sr0.4Cr2Fel-xO3-δ （x--0.10, 0.20） ceramics were investigated by scanning electron microscopy （SEM）, and the electrical conduc- tivities of both oxide ceramics were also measured up to 900℃. The results demonstrated that the chemical stability of the Co-free ***.4CrxFe1-xO3-δ （x=0.10, 0.20） oxides was significantly improved compared to the Co-containing Lao.6Sr0.4C00.2Fe0.8O3-δ and Ba0.5Sr0.5Co0.8Fe0.2O3-δ oxides. The incorporation of Cr cations in the B-site of the pervoskite oxides resulted in the improved structural and chemical stability of the as-synthesized Lao.6Sr0.4CrxFe1-xO3-δ （x=0.10, 0.20） oxides.

关键词： Perovskite Crystal structure Sintering Electrical conductivity

Half-Covered'Glitter-Cake'AM@SE Composite:A Novel Electrode Design for High Energy Density All-Solid-State Batteries

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Nano-Micro Letters 2025年第5期17卷 463-478页

作者： Min Ji Kim Jin-Sung park Jin Woong Lee Sung Eun Wang Dowoong Yoon jong Deok Lee Jung Hyun Kim Taeseup Song Ju Li Yun Chan Kang Dae Soo Jung Energy and Environmental Division Korea Institute of Ceramic Engineering and TechnologyJinjuGyeongnam 52851Republic of Korea Department of Materials Science and Engineering Korea UniversityAnam-DongSeongbuk-GuSeoul 136-713Republic of Korea Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 20139USA Department of Materials Science and Engineering Ajou UniversitySuwon 16499Republic of Korea Department of Energy Systems Research Ajou UniversitySuwon 16499Republic of Korea Department of Energy Engineering Hanyang UniversitySeoul 04763Republic of Korea Department of Materials Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA

All-solid-state batteries(ASSBs)are pursued due to their potential for better safety and high energy ***,the energy density of the cathode for ASSBs does not seem to be satisfactory due to the low utilization of active materials(AMs)at high *** small amount of solid electrolyte(SE)powder in the cathode,poor electrochemical performance is often observed due to contact loss and non-homogeneous distribution of AMs and SEs,leading to high tortuosity and limitation of lithium and electron transport ***,we propose a novel cathode design that can achieve high volumetric energy density of 1258 Wh L^(-1)at high AM content of 85 wt%by synergizing the merits of AM@SE core–shell composite particles with conformally coated thin SE shell prepared from mechanofusion process and small SE *** core–shell structure with an intimate and thin SE shell guarantees high ionic conduction pathway while unharming the electronic *** addition,small SE particles play the role of a filler that reduces the packing porosity in the cathode composite electrode as well as between the cathode and the SE separator *** systematic demonstration of the optimization process may provide understanding and guidance on the design of electrodes for ASSBs with high electrode density,capacity,and ultimately energy density.

关键词： All-solid-state batteries Cathodes Sulfide-based solid electrolytes Interfaces Mechanofusion

An in-situ Raman spectroscopic study on potential-pO^(2-) phase diagram of lanthanum in LiCl-KCl eutectic melt

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Journal of Rare Earths 2020年第7期38卷 793-800,I0004页

作者： Seung park jong-IL Yun Department of Nuclear and Quantum Engineering.KAIST Yuseong-guDaejeon 34141Republic of Korea

The oxidative reaction between lanthanum trichloride and oxide ion was studied in the molten LiCl-KCl eutectic at 773 K by in-situ Raman spectroscopy using an yttria-stabilized zirconia electrode in conjunction with electrochemical *** formation of lanthanum oxychloride,LaOCl(s),was confirmed by studying the vibrational properties of crystalline LaOCl and X-ray diffraction *** solubility product of LaOCl in the LiCl-KCl molten eutectic at 773 K is found to be pKsp(LaOCl)=7.569±0.100,by combining the results of Raman spectroscopy and potentiometric titration with the addition of barium *** use of Raman spectroscopic quantitation of dissolved lanthanum ions in the system allows faster and more accurate determination of the stable phase of lanthanum as well as the solubility product of LaOCl compared with that measured by potentiometric titration *** on experimentally obtained pKsp and standard equilibrium potentials,the potentialpO2- phase diagram of lanthanum in the molten LiCl-KCl eutectic was reported.

关键词： Lanthanum Solubility product E-pO2-diagram Raman spectroscopy Chloride molten salt Rare earths

GENERAL DECAY FOR A QUASILINEAR SYSTEM OF VISCOELASTIC EQUATIONS WITH NONLINEAR DAMPING

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Acta Mathematica Scientia 2012年第4期32卷 1321-1332页

作者： jong Yeoul park Sun Hye park Department of Mathematics Pusan National UniversityBusan 609-735 South Korea

In this paper, we consider a system of coupled quasilinear viscoelastic equa- tions with nonlinear damping. We use the perturbed energy method to show the general decay rate estimates of energy of solutions, which extends some existing results concerning a general decay for a single equation to the case of system, and a nonlinear system of viscoelastic wave equations to a quasilinear system.

关键词： general decay coupled quasilinear equations viscoelastic equations perturbed energy method

Isometric Isomorphisms in Proper CQ＊-algebras

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Acta Mathematica Sinica,English Series 2009年第7期25卷 1131-1138页

作者： Choonkil park jong Su AN Department of Mathematics Hanyang University Department of Mathematics Education Pusan National University

In this paper, we prove the Hyers-Ulam-Rassias stability of isometric homomorphisms in proper CQ＊-algebras for the following Cauchy-Jensen additive mapping： 2f[（x1＋x2）/2＋y]=f（x1）＋f（x2）＋2f（y） The concept of Hyers-Ulam-Rassias stability originated from the Th.M. Rassias＇ stability theorem that appeared in the paper： On the stability of the linear mapping in Banach spaces, Proc. Amer. Math. Soc., 72 （1978）, 297-300. This is applied to investigate isometric isomorphisms between proper CQ＊-algebras.

关键词： Cauchy-Jensen functional equation Hyers-Ulam-Rassias stability isometric isomorphism in proper CQ*-algebras

NEW COLLECTIVELY FIXED POINT THEOREMS AND APPLICATIONS IN G-CONVEX SPACES

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Applied Mathematics and Mechanics(English Edition) 2002年第11期23卷 1237-1249页

作者：丁协平 park jong-yeoul Department of Mathematics

By applying the technique of continuous partition of unity and Tychonoff's fixed point theorem,. some new collectively fixed point theorems for a family of set-valued, mappings defined on the product space of noncompact G-convex spaces are proved. As applications, some nonempty intersetion theorems of Ky Fan type for a family of subsets of the product space of G convex spaces are proved; An existence theorem of solutions for a system of nonlinear inequalities is given in G-convex spaces and some equilibrium existence of abstract economies are also obtained in G convex spaces. Our theorems theorems of improve, unify and generalized many important known results in recent literature.

关键词： collectively fixed point nonempty intersection theorem system of inequality abstruct economy generalized convex space

Electrochemical Characteristics in Seawater for Cold Thermal Spray-Coated Al-Mg Alloy Layer

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Acta Metallurgica Sinica(English Letters) 2016年第8期29卷 727-734页

作者： Il-Cho park Seong-jong Kim Division of Marine Engineering Mokpo National Maritime University

For corrosion protection of carbon steel in a marine environment,cold arc thermal spray coating was applied to the surface with Al and Al-Mg alloy *** surface hardness of Al and Al-Mg thermal spray coatings increased with Mg *** the various electrochemical experiments were carried out to evaluate corrosion damage characteristics of the thermal spray coating *** Al and Al-Mg thermal spray coating layers presented negative potentials compared to carbon steel in corrosion potential *** an anodic polarization experiment revealed a tendency of activation polarization with no ***,the corrosion damage of the thermal spray coating layer in galvanostatic experiment was observed mainly at the defect area,and the Al-3Mg thermal spray coating layer presented less surface damages than *** addition,the Al-3Mg thermal spray coating layer showed the lowest corrosion rate while having a sufficient driving voltage for cathodic corrosion ***,it is an optimal thermal spray material for sacrificial anode.

关键词： Corrosion protection Carbon steel Arc thermal spray coating Al-Mg alloy Marine environment

Zeros of Bergman kernels on some Hartogs domains

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Science China Mathematics 2009年第12期52卷 2730-2742页

作者： park jong-Do School of Mathematics Korea Institute for Advanced StudyHoegiro 87Dongdaemun-guSeoul 130-722Korea

Explicit Bergman kernels are obtained on some Hartogs *** some special cases, zeros of the kernels are considered.

关键词： Bergman kernel Lu’s conjecture Lu Qikeng domain 32H02 32F45