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Difficulties, strategies, and recent research and development of layered sodium transition metal oxide cathode materials for high-energy sodium-ion batteries

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Journal of Energy Chemistry 2024年第3期90卷 40-57,I0003页

作者： Kouthaman Mathiyalagan Dongwoo Shin young-chul lee Department of Nano Science and Technology Convergence Gachon University1342 Seongnam-DaeroSujeong-GuGyeonggi-DoSeongnam-Si 13120Republic of Korea Department of Bio Nano Technology Gachon University1342 Seongnam-DaeroSujeong-GuGyeonggi-DoSeongnam-Si 13120Republic of Korea

Energy-storage systems and their production have attracted significant interest for practical *** are the foundation of sustainable energy sources for electric vehicles(EVs),portable electronic devices(PEDs),*** recent decades,Lithium-ion batteries(LIBs) have been extensively utilized in largescale energy storage devices owing to their long cycle life and high energy ***,the high cost and limited availability of Li are the two main obstacles for *** this regard,sodium-ion batteries(SIBs) are attractive alternatives to LIBs for large-scale energy storage systems because of the abundance and low cost of sodium *** is one of the most important components in the battery,which limits cost and performance of a *** the classified cathode structures,layered structure materials have attracted attention because of their high ionic conductivity,fast diffusion rate,and high specific ***,we present a comprehensive review of the classification of layered structures and the preparation of layered ***,the review article discusses extensively about the issues of the layered materials,namely(1) electrochemical degradation,(2) irreversible structural changes,and(3) structural instability,and also it provides strategies to overcome the issues such as elemental phase composition,a small amount of elemental doping,structural design,and surface alteration for emerging *** addition,the article discusses about the recent research development on layered unary,binary,ternary,quaternary,quinary,and senary-based O3-and P2-type cathode materials for high-energy *** review article provides useful information for the development of high-energy layered sodium transition metal oxide P2 and O3-cathode materials for practical SIBs.

关键词： O3-type P2-type Cathode materials Sodium-ion batteries Layered structure

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Code generation and recognition using a modified ejection system in die-casting process

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China Foundry 2020年第5期17卷 364-371页

作者： Jaekyung Song Jeongsu lee young chul lee Byoung Jun lee Chaeho Lim Industrial Materials and Smart Manufacturing Engineering Korea University of Science and TechnologyDaejeon CityRepublic of Korea Digital Manufacturing Process Group Korea Institute of Industrial TechnologyGyeonggi-doRepublic of Korea

A code-generation and recognition technology that uses a modified ejection system in the diecasting process is *** achieve the highest level of quality management,the first requirement in the manufacturing process is to establish a product management system according to the specific product ***,a method to individually identify each product,such as a barcode or QR code,is required during the production *** manufactured in the die-casting process always have ejector pin(EP)***,an ejection system was modified to generate a unique code using EP *** ejection system has two features:an EP with a modified head to show the direction of rotation,and a function to dependently rotate EPs(five or six EPs)with a constant *** EPs are numbered according to the rotation ***,the EP marks can be viewed as a five-or six-digit code.A program was also developed to individually identify the products by automatically detecting and reading the EPs using deep learning-based object detection and classification technology.

关键词： code recognition die-casting ejection system object detection product management smart manufacturing

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Combination-based nanomaterial designs in single and double dimensions for improved electrodes in lithium ion-batteries and faradaic supercapacitors

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Journal of Energy Chemistry 2019年第11期28卷 119-146页

作者： Tuyet Nhung Pham Duckshin Park Yongil lee Il Tae Kim Jaehyun Hur You-Kwan Oh young-chul lee Department of BioNano Technology Gachon University1342 SeongnamdaeroSujeong-guSeongnam-siGyeonggi-do 13120Republic of Korea Korea Railroad Research Institute(KRRI) 176 Cheoldobakmulkwan-roUiwang-si 16105Gyeonggi-doRepublic of Korea Department of Chemical and Biological Engineering Gachon UniversitySeongnam-siGyeonggi-do 13120Republic of Korea School of Chemical and Biomolecular Engineering Pusan National UniversityBusan 46241Republic of Korea

In the past decade, researchers in the fields of energy production have concentrated on the improvement of new energy storage devices. Lithium-ion batteries(LIBs) and faradaic supercapacitors(FSs) have attracted special attention as a result of the rapid development of new electrode nanomaterials, especially hybrid nanomaterials, which can meet the increasingly higher requirements for future energy, such as the capability to deliver high-power performance and an extremely long life cycle. In these hybrid nanostructures, a series of synergistic effects and unique properties arising from the combination of individual components are a major factor leading to improved charge/discharge capability, energy density, and system lifetime. This paper describes the most recent progress in the growth of hybrid electrode materials for LIBs and FSs systems, focusing on the combination of zero-dimensional(0 D), one-dimensional(1 D), two-dimensional(2 D), and three-dimensional(3 D) nanomaterials, respectively.

关键词： Hybrid nanomaterials Synergistic effects Zero-dimensional nanomaterials One-dimensional nanomaterials Two-dimensional nanomaterials Three-dimensional nanomaterials

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Prebiotic UG1601 mitigates constipation-related events in association with gut microbiota: A randomized placebo-controlled intervention study

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World Journal of Gastroenterology 2019年第40期25卷 6129-6144页

作者： Jae Ryang Chu Saem-Yi Kang Sung-Eun Kim Sol-Ji lee young-chul lee Mi-Kyung Sung Department of Food and Nutrition Sookmyung Women’s UniversitySeoul 04310South Korea Unigen Inc.Cheonan 31257South Korea

BACKGROUND Constipation is a common functional gastrointestinal disorder and its etiology is *** evidence suggests that intestinal dysbiosis is associated with the development of *** are subjected to bacterial fermentation in the gut to produce short-chain fatty acids(SCFAs),which can help relieve constipation *** prebiotic UG1601 consists of inulin,lactitol,and aloe vera gel,which are known laxatives,but randomized,controlled clinical trials that examine the effects of this supplement on gut microbiota composition are *** To assess the efficacy of the prebiotic UG1601 in suppressing constipation-related adverse events in subjects with mild *** Adults with a stool frequency of less than thrice a week were randomized to receive either prebiotics or a placebo supplement for 4 *** participants provided their fecal and blood samples at baseline and at the end of *** symptoms and stool frequency were *** concentrations of serum endotoxemia markers and fecal SCFAs were *** relative abundance of SCFA-producing bacteria and the gut microbial community in the responders and non-responders in the prebiotics supplementation group were *** There were no significant differences in gastrointestinal symptoms between groups,although the prebiotic group showed greater symptom ***,after prebiotic usage,serum cluster of differentiation(CD)14 and lipopolysaccharide(LPS)concentrations were significantly decreased(CD14,P=0.012;LPS,P<0.001).The change in LPS concentration was significantly larger in the prebiotic group than in the placebo group(P<0.001).Fecal SCFAs concentrations did not differ between groups,while the relative abundance of Roseburia hominis,a major butyrate producer,was significantly increased in the prebiotic group(P=0.045).The abundances of the phylum Firmicutes and the family Lachnospiraceae(phylum Firmicutes,class Cl

关键词： Prebiotics Constipation Gut microbiota Endotoxemia Short-chain fatty acids

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Acute and 26-Week Repeated Oral Dose Toxicity Study of UP446, a Combination of <i>Scutellaria</i>Extract and <i>Acacia</i>Extract in Rats

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Food and Nutrition Sciences 2013年第7期4卷 14-27页

作者： young chul lee Eujin Hyun Mesfin Yimam Lidia Brownell Qi Jia Unigen Inc. Cheonan South Korea Unigen Inc. Seattle USA Unigen Inc. Seattle USA.

UP446 has been used in both joint supplements and prescription medical food. The purpose of this study was to evaluate the pharmaceutical safety of UP446 via acute and 26-week repeated oral dose toxicity study in SD rats. In acute toxicity study, UP446 was administered by oral gavage to Sprague-Dawley rats (5 males and 5 females) at a dose of 5000 mg/kg. In 26-week repeated oral dose toxicity study, UP446 at doses of 500, 1000 and 2000 mg/kg/day were given orally to groups of rats (10 rats/dose/sex) for 26-week. UP446 at a dose of 5000 mg/kg produced no treatment-related acute toxicity or mortality in any of the animals tested during 14 days of the study. In 26-week repeated dose toxicity study, there was no significant difference in body weight between the control and all treatment groups. Blackish stool and soft stool was observed in one male in the 1000 mg/kg group and in some males and females of 2000 mg/kg group. However, these changes of stool were not considered to be toxic effects because neither histopathological change in gastrointestinal tracks (GIT) nor body weight change were detected. No drug induced abnormalities were found as of body weights, food consumption, ophthalmological examinations, urinalysis, hematology, clinical chemistry, organ weights and gross necropsy in any animals in the dosing groups. These results suggest that the oral lethal dose of UP446 for male and female rats is in excess of 5000 mg/kg and the no observed adverse effect level (NOAEL) of the UP446 for both male and female rats is considered to be greater than 2000 mg/kg/day.

关键词： Scutellaria baicalensis Acacia catechu Acute Oral Toxicity Repeated Oral Toxicity

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Vlodulation of ABA Signaling by Altering VxGФL Vlotif of PP2Cs in Oryza sativa

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Molecular Plant 2017年第9期10卷 1190-1205页

作者： Seungsu Han

The abscisic acid （ABA） signaling pathway is regulated by clade A type 2C protein phosphatases （PP2CAs） in plants. In the presence of ABA, PP2Cs release stress/ABA-activated protein kinases by binding to ABA-bound receptors （PYL/RCARs） for activation. Although the wedging tryptophan in PP2Cs is critical in the interaction with PYL/RCARs in Arabidopsis and rice, it remains elusive as to how other interface regions are involved in the interaction. Here, we report the identification of a conserved region on PP2Cs, termed the VxG4ФL motif, which modulates the interaction with PYL/RCARs through its second and fourth residues. The effects of the second and fourth residues on the interaction of OsPP2CS0 with several OsPYIJRCAR proteins were investigated by systematic mutagenesis. One OsPP2C50 mutant, VFGML （＂FM＂） mutant, lowered the affinity to OsPYL/RCAR3 by Ф15-fold in comparison with the wUd-type. Compar- ison of the crystal structures of wild-type OsPP2C50：ABA：OsPYI./RCAR3 with those composed of FM mutant revealed local conformational changes near the VxGФL motif, further supported by hydrogen-deute- rium exchange mass spectrometry. In rice protoplasts, ABA signaling was altered by mutations in the VxGФL motif. Transgenic Arabidopsis plants overexpressing OsPP2C50 and OsPP2C5OFM showed altered ABA sensitivity. Taken together, the VxGФL motif of PP2Cs appears to modulate the affinity of PP2Cs with PYL/RCARs and thus likely to alter the ABA signaling, leading to the differential sensitivity to ABA in planta.

关键词： ABA receptor type 2C protein phosphatase VxGФL motif Oryza sativa

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A Rapid Adaptation Approach for Dynamic Air‑Writing Recognition Using Wearable Wristbands with Self‑Supervised Contrastive Learning

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Nano-Micro Letters 2025年第2期17卷 417-431页

作者： Yunjian Guo Kunpeng Li Wei Yue Nam‑young Kim Yang Li Guozhen Shen Jong‑chul lee Department of Electronic Convergence Engineering Kwangwoon UniversitySeoul 01897South Korea Radio Frequency Integrated Circuit(RFIC)Bio Centre Kwangwoon UniversitySeoul 01897South Korea Department of Electronic Engineering Kwangwoon UniversitySeoul 01897South Korea School of Microelectronics Shandong UniversityJinan 250101People’s Republic of China State Key Laboratory of Integrated Chips and Systems Fudan UniversityShanghai 200433People’s Republic of China School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081People’s Republic of China

Wearable wristband systems leverage deep learning to revolutionize hand gesture recognition in daily *** existing approaches that often focus on static gestures and require extensive labeled data,the proposed wearable wristband with selfsupervised contrastive learning excels at dynamic motion tracking and adapts rapidly across multiple *** features a four-channel sensing array composed of an ionic hydrogel with hierarchical microcone structures and ultrathin flexible electrodes,resulting in high-sensitivity capacitance *** wireless transmission from a Wi-Fi module,the proposed algorithm learns latent features from the unlabeled signals of random wrist ***,only few-shot labeled data are sufficient for fine-tuning the model,enabling rapid adaptation to various *** system achieves a high accuracy of 94.9%in different scenarios,including the prediction of eight-direction commands,and air-writing of all numbers and *** proposed method facilitates smooth transitions between multiple tasks without the need for modifying the structure or undergoing extensive task-specific *** utility has been further extended to enhance human–machine interaction over digital platforms,such as game controls,calculators,and three-language login systems,offering users a natural and intuitive way of communication.

关键词： Wearable wristband Self-supervised contrastive learning Dynamic gesture Air-writing Human-machine interaction

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LTCC SoP RF Transceiver Module for 60 GHz Wireless Gigabit Ethernet Communication System

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通讯和计算机（中英文版） 2010年第6期7卷 63-70页

作者： Azzemi Ariffin Suhandi Bujang Mohd Fadzil Amiruddin Salizul Jaafarl Noor Aisyah Mohd. Akib young chul lee System Technology Program Telekom Research ＆ Development Sdn. Bhd. TMR＆D Innovation Centre Cyberjaya 63000 Malaysia Division of Marine Electronics and Communication Engineering Mokpo National Maritime University （MMU） Jeonnam 530-729Korea

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氟利昂的替代品-植物油基环境友好型工业清洗剂

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中国洗涤用品工业 2018年第11期 46-59页

作者： Eui Jin Kim young-chul lee Hyun Uk lee Yun Suk Huh Myungjin lee 张家骆(译) 不详江南大学化学与材料工程学院江苏无锡214122

众所周知,氟利昂(CFCs)会导致平流层中臭氧的减少,加剧全球变暖。为此,许多研究团队都在致力于研究氟利昂的替代品。本文基于大豆油和菜子油制备两种生物表面活性剂,并将其分别应用于W/O和O/W型清洗剂配方。将上述生物表面活性剂与月桂... 详细信息

众所周知,氟利昂(CFCs)会导致平流层中臭氧的减少,加剧全球变暖。为此,许多研究团队都在致力于研究氟利昂的替代品。本文基于大豆油和菜子油制备两种生物表面活性剂,并将其分别应用于W/O和O/W型清洗剂配方。将上述生物表面活性剂与月桂醇、蓖麻油和油酸混合,研究了它们在4～60℃冷热循环的相变化,从而确定最佳的单相的形成参数。分析了生物表面活性剂的生物降解性能、清洗效率和在工业清洗过程中对基质材料(金属、聚合物)的腐蚀伤害。结果显示:大豆油甲酯(SME)在W/O和O/W配方中的生物降解度分别为94.66%和95.60%,在最佳清洗条件下对模型污染物的清洗效率分别为99%和97%;而菜籽油乙酯(CEE)在W/O和O/W配方中的生物降解度分别为94.43%和93.87%,对模型污染物的清洗效率分别为58%和15%。SME的W/O和O/W清洗剂配方、CEE的W/O和O/W清洗剂配方对生铁和聚氯乙烯的腐蚀伤害是最大的,最大腐蚀度分别为0.11/7.65、0.44/5.79、0.11/11.80、和0.12/2.84(rmg/cm^3)。SME的W/O清洗剂相较于传统工业清洗剂中所使用的三氯乙烯(TCE),可以在更短时间(<5min)内实现更高的清洗效率(99%),因此,有望在工业清洗中作为CFC的替代品使用。

关键词：工业清洗生物表面活性剂氟利昂生物降解能力清洗效率腐蚀度

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Analgesic and anti-inflammatory effects of UP1304,a botanical composite containing standardized extracts of Curcuma longa and Morus alba

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Journal of Integrative Medicine 2016年第1期14卷 60-68页

作者： Mesfin Yimam young-chul lee Breanna Moore Ping Jiao Mei Hong Jeong-Bum Nam Mi-Ran Kim Eu-Jin Hyun Min Chu Lidia Brownell Qi Jia Department of Discovery and Screening Unigen Inc. Seattle WA 98121 USA Department of Preclinical Development Unigen Inc. Cheonan-Si Chungnam 330-863 Korea

OBJECTIVE： Though the initial etiologies of arthritis are multifactorial, clinically, patients share the prime complaints of the disease, pain. Here the authors assessed the analgesic and anti-inflammatory effects of UP1304, a composite that contains a standardized blend of extracts from the rhizome of Curcuma /onga and the root bark of Morus a/ba, on rats with carrageenan-induced paw edema. METHODS： A plant library was screened for bradykinin receptor antagonists./n vivo, the anti- inflammatory and analgesic effects of the standardized composite, UP1304, were evaluated in rats with carrageenan-induced paw edema using oral dose ranges of 100-400 mg/kg. Ibuprofen, at a dose of 200 mg/kg, was used as a reference compound. In vitro, cycleoxygenase （COX） and lipoxygenase （LOX） inhibition assays were performed to evaluate the degree of inflammation. RESULTS： Statistically significant improvements in pain resistance and paw edema suppression were observed in animals treated with UP1304, when compared to vehicle-treated rats. Results from the highest dose of UP1304 （400 mg/kg） were similar to those achieved by ibuprofen treatment at 200 mg/kg. /n vitro, UP1304 showed dose-dependent inhibition of the enzymatic activities of COX and LOX. A half-maximal inhibitory concentration of 9.6 tJg/mL for bradykinin B1 inhibition was calculated for the organic extract of C./onga. Curcumin showed Ki values of 2.73 and 58 IJg/mL for bradykinin receptors B1 and B2, respectively. CONCLUSION： Data presented here suggest that UP1304, analgesic and anti-inflammatory agent of botanical origin, acted as a bradykinin receptor B1 and B2 antagonist, and inhibited COX and LOX enzyme activities. This compound should be considered for the management of symptoms associated with arthritis.

关键词： Curcuma Ionga Morus alba arthritis chronic pain bradykinin inhibition

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