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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

Crystallization Modulation and Holistic Passivation Enables Efficient Two‑Terminal Perovskite/CuIn(Ga)Se_(2)Tandem Solar Cells

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Nano-Micro Letters 2025年第1期17卷 205-215页

作者： Cong Geng Kuanxiang Zhang Changhua Wang Chung Hsien Wu Jiwen Jiang Fei Long Liyuan han Qifeng han Yi‑Bing Cheng yong Peng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Triumph Photovoltaic Materials Co. Ltd.No.1001 Yannan AvenueHigh‑Tech Development DistrictBengbuAnhui 233000People’s Republic of China College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004People’s Republic of China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Two-terminal(2-T)perovskite(PVK)/CuIn(Ga)Se_(2)(CIGS)tandem solar cells(TSCs)have been considered as an ideal tandem cell because of their best bandgap matching regarding to Shockley–Queisser(S–Q)***,the nature of the irregular rough morphology of commercial CIGS prevents people from improving tandem device *** this paper,D-homoserine lactone hydrochloride is proven to improve coverage of PVK materials on irregular rough CIGS surfaces and also passivate bulk defects by modulating the growth of PVK *** addition,the minority carriers near the PVK/C60 interface and the incompletely passivated trap states caused interface recombination.A surface reconstruction with 2-thiopheneethylammonium iodide and N,N-dimethylformamide assisted passivates the defect sites located at the surface and grain ***,LiF is used to create this field effect,repelling hole carriers away from the PVK and C60 interface and thus reducing *** a result,a 2-T PVK/CIGS tandem yielded a power conversion efficiency of 24.6%(0.16 cm^(2)),one of the highest results for 2-T PVK/CIGS TSCs to our *** validation underscores the potential of our methodology in achieving superior performance in PVK/CIGS tandem solar cells.

关键词： PVK/CIGS TSCs Irregular rough surfaces Modulating the growth PVK/C60 interface recombination

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BUILDING FOR THE FUTURE:UNITED NATIONS APPROACH FOR THEIR BUILDINGS

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Journal of Green Building 2011年第4期6卷 1-6页

作者： yong han ahn Department of Construction Management at East Carolina University

INTRODUCTION The term“Sustainable Development”was first used in the Brundtland Report from the United Nations World Commission on Environment Development(WCED)in *** this report,sustainable development was defined as“development that meets the needs of the present without compromising the ability of future generations to meet their own needs.”

关键词： Sustainable sustainable BUILDING

Digital Vision Based Concrete Compressive Strength Evaluating Model Using Deep Convolutional Neural Network

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Computers, Materials & Continua 2019年第9期61卷 911-928页

作者： Hyun Kyu Shin yong han ahn Sang Hyo Lee Ha Young Kim Architectural Engineering Hanyang UniversityERICAAnsan-si15588Korea School of Architecture and Architectural Engineering Hanyang UniversityERICAAnsan-si15588Korea Division of Architecture and Civil Engineering Kangwon National UniversitySamcheok-si25913Korea Graduate School of Information Yonsei UniversitySeoul-si03722Korea.

Compressive strength of concrete is a significant factor to assess building structure health and ***,various methods have been developed to evaluate the compressive strength of concrete ***,previous methods have several challenges in costly,time-consuming,and *** address these drawbacks,this paper proposed a digital vision based concrete compressive strength evaluating model using deep convolutional neural network(DCNN).The proposed model presented an alternative approach to evaluating the concrete strength and contributed to improving efficiency and *** model was developed with 4,000 digital images and 61,996 images extracted from video recordings collected from concrete *** experimental results indicated a root mean square error(RMSE)value of 3.56(MPa),demonstrating a strong feasibility that the proposed model can be utilized to predict the concrete strength with digital images of their surfaces and advantages to overcome the previous *** experiment contributed to provide the basis that could be extended to future research with image analysis technique and artificial neural network in the diagnosis of concrete building structures.

关键词： Concrete compressive strength deep learning deep convolutional neural network image-based evaluation building maintenance and management

GREEN LUXURY:A CASE STUDY OF TWO GREEN HOTELS

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Journal of Green Building 2013年第1期8卷 90-119页

作者： yong han ahn Annie R.Pearce Western Carolina University Myers-Lawson School of Construction Virginia Tech

The hotel industry is beginning to implement green design and construction practices,saving energy,water,and resources and thus helping to preserve the *** addition,green building practices also can provide healthy and comfortable indoor environments to hotel occupants including guests and ***,there is the potential for conflict between green building practices and hotel guests’satisfaction and comfort,as the conservation of resources could detract from the quality of a guest’s visitor *** study adopted a case study approach to identify and analyze green design and construction practices that create a green and luxurious environment without damaging the hotels’financial *** in-depth literature review was conducted to identify green design and construction practices,design features of premium hotels,and major design conflicts between the twin goals of green building and a luxurious hotel *** LEED platinum hotels(the Proximity Hotel and the Bardessono Hotel,both in the United States)were selected and data collected on their green design and construction practices,luxurious design features,and operation and maintenance practices from multiple sources,including the owner,designer,contractor,engineer,and LEED *** the perspective of the entire lifecycle of the building,this data was analyzed to identify green design and construction practices that not only provide a green,luxurious environment but also enhance the hotels’financial strength.

关键词： green building green design and construction practice hotel industry case study

Incidence, prevalence and risk of stroke in patients with Takayasu arteritis: a nationwide population-based study in South Korea

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Stroke & Vascular Neurology 2022年第2期7卷 149-157页

作者： Sung Soo ahn Minkyung han yong-Beom Park Inkyung Jung Sang-Won Lee Department of Internal Medicine Yongin Severance HospitalYonsei University College of MedicineYonginSouth Korea Biostatistics Collaboration Unit Department of Biomedical Systems InformaticsYonsei University College of MedicineSeoulSouth Korea Division of Rheumatology Department of Internal MedicineYonsei University College of MedicineSeoulSouth Korea Institute for Immunology and Immunological Diseases Yonsei University College of MedicineSeoulSouth Korea Division of Biostatistics Department of Biomedical Systems InformaticsYonsei University College of MedicineSeoulSouth Korea

Background Takayasu arteritis(TAK)is a disease associated with increased risk of cardiovascular *** aimed to evaluate the incidence,prevalence and risk of stroke in patients with *** Data from 1065 patients were obtained from a national database(2010–2018).The annual incidence and prevalence per 100000 persons were estimated using the registration population in the midst of every year,and the standardised incidence ratio(SIR)of stroke was compared with the general population based on the data from the 2006 national report for cardiovascular and cerebrovascular ***-adjusted incidence rate ratio(IRR)of stroke based on the time interval after diagnosis was also calculated.A time-dependent Cox regression was conducted to investigate predictive factors of *** The overall incidence rate of TAK ranged between 0.2 and 0.3/100000 person-years annually;the prevalence of TAK gradually increased,reaching 3.25/100000 person-years in ***-three(6.9%)patients experienced stroke during follow-up,and the risk of developing stroke was higher than the general population(overall SIR 7.39,95%CI 5.79 to 9.29;men:SIR 5.70,95%CI 2.84 to 10.20;women:SIR 7.06,95%CI 5.41 to 9.05).Most stroke events(90.9%)were cerebral infarction for men,whereas the proportion of cerebral infarction was lower(62.9%)in *** half of stroke events occurred within 6 months after diagnosis,and stroke was more common within 6 months of diagnosis compared with after 3 years in women(IRR 13.46,95%CI 6.86 to 26.40).In Cox regression analysis,age was the sole predictor of stroke(adjusted HR 1.02,95%CI 1.00 to 1.04,p=0.043).Conclusions The annual incidence of TAK was similar to the previous studies from Asia,and the risk of stroke increased in *** patterns of subtype and incidence of stroke were found according to sex,although age was the only predictor.

关键词： prevalence patients diagnosis

Effect of Ni and Mn on the Mechanical Properties of 22Cr Microduplex Stainless Steel

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Acta Metallurgica Sinica(English Letters) 2015年第1期28卷 32-38页

作者： Jun-Young Park yong-Sik ahn Department of Materials Science and Engineering Pukyong National University

The tensile properties of 22Cr–2Ni–4Mn–0.2N micro-duplex stainless steels with different Ni and Mn contents were investigated. Duplex stainless steels were vacuum induction melted and hot rolled, then annealed at 1,000–1,100 °C, at which temperature both the austenite and ferrite phases were stable. The volume fraction of the ferrite phase was markedly affected by the alloying elements of Mn and Ni; 1 wt% of Mn was equivalent to 0.4 wt% of Ni. All of the steels tested at room temperature showed the common strain-hardening behavior, while the steels tested at lower temperatures（-30 or-50 °C）showed a distinct inflection point in their stress–strain curves, which resulted from the transformation of the austenite to straininduced martensite. The onset strain（e0） of the inflection point in the stress–strain curve depended on the Md30 value of the steel. Testing at lower temperatures resulted in smaller e0 and consequently higher strengths and fracture strains（ef）. The tensile behavior was examined from the perspective of austenite stability of the micro-duplex stainless steels with the different Ni and Mn contents.

关键词： Duplex stainless steel Microstructure Mechanical property Alloy composition

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The Minimal Free Resolution of a Fat Star-Configuration in Pn

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Algebra Colloquium 2014年第1期21卷 157-166页

作者： Jeaman ahn yong Su Shin Department of Mathematics Education Kongju National University 182 Shinkwan-dong Kongju Chungnam 314-701 Korea Department of Mathematics Sungshin Women's University Seoul 136-742 Korea

Abstract. We find the minimal free resolution of a fat star-configuration X in Pn of type （r, s,t） defined by general forms of degrees d1,...,dr, and show that a fat linear star- configuration X in P2 never has generic Hilbert function if （s,t） ≠ （1, 1） or （2, 2）. These two results generalize the interesting results of [2].

关键词： Hilbert functions minimal free resolutions weak Lefschetz property fat star-configurations

A Cu-Pd alloy catalyst with partial phase separation for the electrochemical CO_(2) reduction reaction

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Journal of Energy Chemistry 2024年第6期93卷 8-15,I0001页

作者： Gyeong Ho han Jung yong Seo Minji Kang Myung-gi Seo Youngheon Choi Soo Young Kim Sang Hyun ahn School of Chemical Engineering and Material Science Chung-Ang UniversitySeoul 06974Republic of Korea Lotte Chemical Institute of Technology Daejeon 34110Republic of Korea Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea

Cu catalysts can convert CO_(2) through an electrochemical reduction reaction into a variety of useful carbon-based ***,this capability provides an obstacle to increasing the selectivity for a single ***,we report a simple fabrication method for a Cu-Pd alloy catalyst for use in a membrane electrode assembly(MEA)-based CO_(2) electrolyzer for the electrochemical CO_(2) reduction reaction(ECRR)with high selectivity for CO *** the composition of the Cu-Pd alloy catalyst was fabricated at 6:4,the selectivity for CO increased and the production of multi-carbon compounds and hydrogen is *** a Cu-Pd alloy catalyst with 6:4 ratio as the cathode of the MEAbased CO_(2) electrolyzer showed a CO faradaic efficiency of 92.8%at 2.4 V_(cell).We assumed that these results contributed from the crystal planes on the surface of the Cu-Pd *** phases of the Cu-Pd alloy catalyst were partially separated through annealing to fabricate a catalyst with high selectivity for CO at low voltage and C_(2)H_4 at high *** results of CO-stripping testing confirmed that when Cu partially separates from the lattice of the Cu-Pd alloy,the desorption of~*CO is suppressed,suggesting that C-C coupling reaction is favored.

关键词： Cu-Pd catalyst Electrodeposition Electrochemical carbon dioxide reduction Partial phase separation Membrane electrode assembly-based electrolyzer

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