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A systematic correlation between morphology of porous carbon cathode and electrolyte in lithium-sulfur battery

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Journal of Energy Chemistry 2021年第10期30卷 561-573,I0014页

作者： Jihyeon Park Seoyoung Yoon Seoyeah Oh Jiyoon kim Dongjun kim Geonho kim Jiyeon Lee Myeong Jun Song Ilto kim Kwonnam Sohn jiwon kim School of Integrated Technology College of EngineeringYonsei University85 Songdogwahak-roYeonsu-guIncheon 21983Republic of Korea Integrated Science and Engineering Division Underwood International CollegeYonsei University85 Songdogwahak-roYeonsu-guIncheon 21983Republic of Korea Integrated Biotechnology and Translational Medicine Graduate SchoolYonsei University85 Songdogwahak-roYeonsu-guIncheon 21983Republic of Korea LG Chem. LG Science Park30 Magokjungang 10-roGangseo-guSeoul 07796Republic of Korea

Porous carbon has been applied for lithium-sulfur battery cathodes,and carbonized metal-organic framework(MOF)is advantageous in tuning the ***,we have systematically synthesized water-distorted MOF(WDM)derived porous carbon via controlling the proportion of both water in a mixed solvent(dimethylformamide and water)and ligand in MOF-5 precursors(metal and ligand),which is categorized by its morphology(*** stone(closed),Tassel(open)and Intermediate(semi-open)).For example,decrease in water and increase in ligand content induce Cracked stone WDMs which showed the highest specific surface area(2742-2990 m^(2)/g)and pore volume(2.81-3.28 cm^(3)/g)after *** effect of carbonized WDMs(CWDMs)on battery performance was examined by introducing electrolytes with different sulfur reduction mechanisms(***/DME and ACN_(2) LiTFSITTE):Closed framework effectively confines polysulfide,whereas open framework enhances electrolyte *** initial capacities of the batteries were in the following order:Cracked stone>Intermediate>Tassel for DOL/DME and Intermediate>Tassel>Cracked stone for ACN_(2) *** note,Intermediate CWDM exhibited the highest initial capacity and retained capacity after 100 cycles(1398 and 747 mAh/g)in ACN_(2) LiTFSI-TTE electrolyte having advantages from both open and closed *** sum,we could correlate cathode morphology(openness and pore structure)and electrolyte type(*** solubility)with lithium-sulfur battery performance.

关键词： Lithium-sulfur battery Metal-organic framework Hierarchical porous carbon cathode Morphology control Electrolyte Lithium polysulfide solubility

Manifolding active sites and in situ/operando electrochemical-Raman spectroscopic studies of single-metal nanoparticle-decorated CuO nanorods in furfural biomass valorization to H_(2) and 2-furoic acid

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Journal of Energy Chemistry 2023年第9期84卷 50-61页

作者： jiwon kim Talshyn Begildayeva Jayaraman Theerthagiri Cheol Joo Moon Ahreum Min Seung Jun Lee Gyeong-Ah kim Myong Yong Choi Department of Chemistry(BK21 FOUR) Research Institute of Natural SciencesGyeongsang National UniversityJinju 52828Republic of Korea Core-Facility Center for Photochemistry&Nanomaterials Gyeongsang National UniversityJinju 52828Republic of Korea Department of IT-Energy Convergence(BK21 FOUR) Korea National University of TransportationChungju 27469Republic of Korea

Here,CuO nanorods fabricated via pulsed laser ablation in liquids were decorated with Ir,Pd,and Ru NPs(loading~7 wt%) through pulsed laser irradiation in the liquids *** resulting NPs-decorated CuO nanorods were characterized spectroscopically and employed as multifunctional electrocatalysts in OER,HER,and the furfural oxidation reactions(FOR).Ir-CuO nanorods afford the lowest overpotential of~345 mV(HER) and 414 mV(OER) at 10 mA cm^(-2),provide the highest 2-furoic acid yield(~10.85 mM) with 64.9% selectivity,and the best Faradaic efficiency~72.7% in 2 h of FOR at 1.58 V(***).In situ electrochemical-Raman analysis of the Ir-CuO detects the formation of the crucial intermediates,such as Cu(Ⅲ)-oxide,Cu(OH)_(2),and Ir_x(OH)_y,on the electrode-electrolyte surface,which act as a promoter for HER and *** Ir-CuO ‖ Ir-CuO in a coupled HER and FOR-electrolyzer operates at~200 mV lower voltage,compared with the conventional electrolyzer and embodies the dual advantage of energy-saving H_(2) and 2-furoic acid production.

关键词： Single-metal nanoparticle-decorated CuO nanorods Pulsed laser ablation and irradiation in liquids Furfural oxidation reaction Hydrogen evolution reaction Energy-saving H_(2)production 2-Furoic acid

Effect of expanding nanocellulose sponge on nasal mucosal defects in an animal model

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Regenerative Biomaterials 2020年第1期7卷 47-52页

作者： jiwon kim Kyungbae Woo Jeong Mi kim Mi Eun Choi Young-Mo kim Su-Geun Yang Bong Sup Shim Jeong-Seok Choi Department of Otorhinolaryngology Inha UniversityCollege of Medicine27 Inhang-roJung-guIncheon 22332Republic of Korea Department of Chemical Engineering Inha University100 InharoMichuholguIncheon 22212Republic of Korea Department of New Drug Development Inha UniversityCollege of MedicineB-308Chungsuk Bldg.366Seohae-DaeroJung-GuIncheon 22332Republic of Korea

Nanocellulose has emerged for a wide range of applications in biomedical engineering because of its water absorption capacity,appropriate *** investigated the hemostatic and regenerative abilities of an expanding polyvinyl alcohol(PVA)-nanocellulose sponge on nasal mucosal defects.A 3 mm-diameter nasal defect was made in experimental *** were divided into four groups with control,vaseline,PVA and PVA-nanocellulose packing *** the defect was created,bleeding times and amounts were *** materials were removed on experimental day(ED)*** ED 3,7 and 14,histological analysis and immunohistochemical study for neutrophils were *** cells were counted and epithelial thicknesses were *** amounts and times in the vaseline packing group were smaller than in the PVA ***-nanocellulose group showed less neutrophils than in the other groups on ED *** epithelium thickness in the PVA-nanocellulose group was significantly smaller than in the control group at ED 7,but at ED 14,there was no significant intergroup *** group had a significant lower inflammatory cell count than the control group on ED ***-nanocellulose sponge applied to nasal mucosal defects can significantly enhance mucosal regeneration during early wound healing.

关键词： polyvinyl alcohol nasal mucosa nanocellulose

The Study on Market-oriented Strategies in China:Evidence from Korean Company,Amore Pacific

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The Study on Market-oriented Strategies in China:Evidence fr...

作者： jiwon kim 山东大学

学位级别：硕士

近年来,中国经济的快速发展和国民收入的增加,受到了世界各国的广泛关注。中国化妆品市场也逐渐成为世界上规模最大的市场,而且具有巨大的成长潜力。韩国化妆品公司自90年代初期进入中国市场以来,一直取得了较好的业绩,目前韩国已成为... 详细信息

近年来,中国经济的快速发展和国民收入的增加,受到了世界各国的广泛关注。中国化妆品市场也逐渐成为世界上规模最大的市场,而且具有巨大的成长潜力。韩国化妆品公司自90年代初期进入中国市场以来,一直取得了较好的业绩,目前韩国已成为中国第二大化妆品进口国。通过韩流的广泛传播,韩国化妆品公司在中国留下了极好的印象。在韩国化妆品企业中,爱茉莉太平洋集团运用了较好的营销策略。本文对爱茉莉太平洋在中国市场的战略以及策略进行了分析。首先,本文考察了中国化妆品行业的现状,了解中国消费者的特点,并对韩国化妆品在中国的占有率、潜力和现状进行分析。基于这些内容,运用SWOT分析法、STP分析法和市场营销学的经典4P理论,探索了爱茉莉太平洋在中国市场采用的营销策略和方法。通过分析可以发现,爱茉莉太平洋在中国形成了与其他竞争者的显著区别,并在中国实行了本土化战略。此外,目前爱茉莉太平洋为了吸引中国市场主流90后的兴趣,从新零售方面来探讨消费者情绪,包括电子商务和在实体店的经验。最后,本文对中国化妆品上市公司提出了建议,主要内容为关注潜力巨大的市场,如农村市场、男性市场和婴儿市场。

关键词：中国市场差异化战略本土化战略爱茉莉太平洋市场导向战略

Trifunctional robust electrocatalysts based on 3D Fe/N-doped carbon nanocubes encapsulating Co4N nanoparticles for efficient battery-powered water electrolyzers

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Carbon Energy 2024年第6期6卷 124-139页

作者： Hyung Wook Choi Hongdae Lee Jun Lu Seok Bin Kwon Dong In Jeong Beum Jin Park jiwon kim Bong Kyun Kang Gun Jang Dae Ho Yoon Ho Seok Park SKKU Advanced Institute of Nano Technology(SAINT) Sungkyunkwan UniversitySuwon-siGyeonggi-doRepublic of Korea School of Chemical Engineering Sungkyunkwan UniversitySuwon-siGyeonggi-doRepublic of Korea School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySuwon-siGyeonggi-doRepublic of Korea Department of Electronic Materials Devicesand Equipment EngineeringSoonchunhyang UniversityAsan CityChungnamRepublic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan UniversitySuwon-siGyeonggi-doRepublic of Korea Department of Health Sciences and Technology Samsung Advanced Institute for Health Sciences and Technology(SAIHST)Sungkyunkwan UniversitySuwonRepublic of Korea

Herein,we have designed a highly active and robust trifunctional electrocatalyst derived from Prussian blue analogs,where Co_(4)N nanoparticles are encapsulated by Fe embedded in N-doped carbon nanocubes to synthesize hierarchically structured Co_(4)N@Fe/N-C for rechargeable zinc-air batteries and overall water-splitting *** confirmed by theoretical and experimental results,the high intrinsic oxygen reduction reaction,oxygen evolution reaction,and hydrogen evolution reaction activities of Co_(4)N@Fe/N-C were attributed to the formation of the heterointerface and the modulated local electronic ***,Co_(4)N@Fe/N-C induced improvement in these trifunctional electrocatalytic activities owing to the hierarchical hollow nanocube structure,uniform distribution of Co_(4)N,and conductive encapsulation by Fe/***,the rechargeable zinc-air battery with Co_(4)N@Fe/N-C delivers a high specific capacity of 789.9 mAh g^(-1) and stable voltage profiles over 500 ***,the overall water electrolyzer with Co_(4)N@Fe/N-C achieved better durability and rate performance than that with the Pt/C and IrO2 catalysts,delivering a high Faradaic efficiency of 96.4%.Along with the great potential of the integrated water electrolyzer powered by a zinc-air battery for practical applications,therefore,the mechanistic understanding and active site identification provide valuable insights into the rational design of advanced multifunctional electrocatalysts for energy storage and conversion.

关键词： battery-powered electrolyzers hierarchical structure Prussian blue analog trifunctional electrocatalyst zinc-air battery

Energy Efficiency Classification for Agricultural Heater

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Journal of Agricultural Science and Technology(A) 2012年第10期2卷 1149-1154页

作者： Yonngiung kim Geumchoon Kang Youngj in kim Chungkil kim jiwon Seo Department of Agricultural Engineering National Academy of Agricultural Science Rural Development Administration Suwon441-707 Republic of Korea

Classification of energy efficiency system for agricultural heater was discussed and analyzed in order to derive an energy efficiency classification scheme for agricultural heater. Current practices of energy efficiency programs for other products such as residential gas boiler were investigated and analyzed. Test items including energy efficiency and standby power for agricultural heater were analyzed. With the data of residential gas boiler, grade distribution of energy efficiency system was made and evaluated. An energy efficiency classification scheme for agricultural heater was proposed and applied to agricultural heaters, and the scheme was justified. Introducing a new energy efficiency classification system to the agricultural heater industry, it is expected that considerable amount of fossil fuels can be reduced by adopting energy efficiency classification system.

关键词： Energy efficiency agricultural heater heating capacity classifying.

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亚太区的交易撮合者

新理财（公司理财） 2019年第10期 71-72页

作者： George W.Russell jiwon kim(摄影) 不详

香港会计师公会会员包思伟(Anthony Boswell)在香港度过了难忘的职业生涯,他处理过百富勤投资(Peregrine Investments)清盘以及雷曼兄弟"迷你债券"风波,现于悉尼担任Denning Asia的董事总经理。他在前往奥克兰洽谈交易的途中,分享如何... 详细信息

香港会计师公会会员包思伟(Anthony Boswell)在香港度过了难忘的职业生涯,他处理过百富勤投资(Peregrine Investments)清盘以及雷曼兄弟"迷你债券"风波,现于悉尼担任Denning Asia的董事总经理。他在前往奥克兰洽谈交易的途中,分享如何为澳大利亚和新西兰的企业同中国香港的非银行贷款机构牵线搭桥。

关键词：交易香港会计师公会亚太区职业生涯雷曼兄弟贷款机构中国香港澳大利亚

A Blockchain-Based Trust Model for Supporting Collaborative Healthcare Data Management

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Computer Systems Science & Engineering 2023年第9期46卷 3403-3421页

作者： jiwon Jeon Junho kim Mincheol Shin Mucheol kim Department of Computer Science and Engineering Chung-Ang UniversitySeoul06911Korea

The development of information technology allows the collaborative business process to be run across multiple enterprises in a larger market ***,while collaborative business expands the realm of businesses,it also causes various hazards in collaborative Interaction,such as data falsification,inconstancy,*** solve these issues,a blockchainbased collaborative business modeling approach was proposed and ***,the existing studies lack the blockchain risk problem-solving specification,and there is no verification technique to examine the ***,it is difficult to confirm the appropriateness of the ***,here,we propose and build a blockchain-based trust model to strengthen and verify the integrity and security of the collaborative business process;Integrity and security address the validity of collaborative interactions in terms of a trust,and we construct a blockchain pattern based on trust elements to meet the required the ***,a trust model can be applied to the healthcare data-sharing process,and then the achievement of the trustbased safe data-sharing process can be *** model can be used as a trust-building guidance tool or for integrity and security verification with the collaborative business process in a distributed environment with blockchain.

关键词： Blockchain business process trustmodel healthcare data-sharing data science

Sex-specific effects of social networks on the prevalence, awareness, and control of hypertension among older Korean adults

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Journal of Geriatric Cardiology 2016年第7期13卷 580-586页

作者： jiwon Baek Nam Wook Hur Hyeon Chang kim Yoosik Youm Department of Sociology Yonsei University College of Social Sciences Seoul South Korea Department of Preventive Medicine Yonsei University College of Medicine Seoul South Korea

Background Hypertension is a common chronic disease among older adults, and is associated with medical complications and mor- tality. This study aimed to examine the effects of social network characteristics on the prevalence, awareness, and control of hypertension among older adults. Methods The Korean Social Life, Health, and Aging Project （KSHAP） interviewed 814 〉 60-year-old residents and their spouses from a rural township between December 2011 and March 2012 （response rate： 95%）. We evaluated the data from 595 partici- pants. Multivariate logistic regression models were used to assess the effects of network characteristics on hypertension. Results We ob- served strong sex-specific network effects on the prevalence, awareness, and control of hypertension. Among older women, network density was associated with hypertension awareness [odds ratio （OR）： 2.63, 95% confidence interval （CI）： 1.03 5.37J and control （OR： 1.72; 95% CI 0.94-3.13）. Among older men, large networks were associated with a lower prevalence of hypertension （OR： 0.75; 95% CI： 0.58-0.96）. Compared to older women, older men with coarse networks exhibited better hypertension awareness （OR： 0.37; 95% CI： 0.14-0.95） and control （OR： 0.42; 95% CI： 0.19-0.91 ）. Network size interacted with density for hypertension control （P = 0.051）, with controlled hyperten- sion being associated with large and course networks. Conclusions A large network was associated with a lower risk for hypertension, and a coarse network was associated with hypertension awareness and control among older men. Older women with dense networks were most likely to exhibit hypertension awareness and control.

关键词： Hypertension management Sex difference Social density Social network