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Rapid determination of lithium-ion battery degradation: High C-rate LAM and calculated limiting LLI

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Journal of Energy Chemistry 2022年第4期31卷 663-671页

作者： Gyuwon Seo Jaeyun Ha Moonsu Kim Jihyeon Park Jaewon lee Eunoak Park Sungyool bong Kiyoung lee Soon Jong Kwon Seung-pil Moon Jinsub Choi Jaeyoung lee Electrochemical Reaction and Technology Laboratory School of Earth Sciences and Environmental EngineeringGwangju Institute of Science and Technology(GIST)Gwangju 61005South Korea Department of Chemistry and Chemical Engineering Inha UniversityIncheon 22212South Korea Ertl Center for Electrochemistry and Catalysis GISTGwangju 61005South Korea Korea Electric Power Corporation Research Institute Daejeon 34056South Korea International Future Research Center of Chemical Energy Storage and Conversion Processes(ifRC-CHESS) GISTGwangju 61005South Korea

Herein,incremental capacity-differential voltage (IC-DV) at a high C-rate (HC) is used as a non-invasive diagnostic tool in lithium-ion batteries,which inevitably exhibit capacity fading caused by multiple mechanisms during charge/discharge *** battery degradation modes are complex,the simple output of capacity fading does not yield any useful data in that *** IC and DV curves obtained under restricted conditions (<0.1C,25℃) were applied in non-invasive analysis for accurate observation of degradation symptoms,a facile,rapid diagnostic approach without intricate,complex calculations is critical in on-board ***,Li Ni_(0.5)Mn_(0.3)Co_(0.2)O_(2)(NMC532)/graphite pouch cells were cycled at 4 and 6C and the degradation characteristics,i.e.,loss of active materials (LAM) and loss of lithium inventory (LLI),were parameterized using the IC-DV *** the incremental current cycling,the initial steep LAM and LLI slopes underwent gradual transitions to gentle states and revealed the gap between low-and high-current measurements.A quantitative comparison of LAM at high and low C-rate showed that a IC;revealed the relative amount of available reaction region limited by cell ***,this did not provide a direct relationship for estimating the LAM at a low ***,the limiting LLI,which is calculated at a C-rate approaching 0,was obtained by extrapolating the LLI through more than two points measured at high C-rate,and therefore,the LLI at 0.1C was accurately determined using rapid cycling.

关键词： Battery degradation Rapid degradation diagnosis Loss of active materials(LAM) Loss of lithium inventory(LLI) Incremental capacity(IC) Differential voltage(DV)

Graphene derivatives supported nanocatalysts for oxygen reduction reaction

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Chinese Journal of Catalysis 2015年第11期36卷 1799-1810页

作者： Ilkeun lee Ji bong Joo Mohammadreza Shokouhimehr 加利福尼亚大学河滨分校化学系美国韩国能源研究所低碳过程实验室韩国大田305-343 国立首尔大学工程学院化工和生物工程系韩国首尔151-741

Very recent progress on the graphene derivatives supported variable nanocatalysts for oxygen reduction reaction （ORR） in fuel cell is reviewed. First, common electrochemical techniques to characterize graphene-based electrocatalysts are mentioned. Second, recent updates on gra- phene-derived electrocatalysts are introduced. In this part, both electrochemical activity and stabil- ity of Pt catalysts can be improved when they are supported by reduced graphene oxide （RGO）. Other noble-metal catalysts including Pd, Au, and Ag showing comparable performance have been investigated. The stability of Pd catalyst is enhanced by RGO or few-layered graphene support. Syn- thetic approaches for Au or Ag catalysts supported on graphene oxide are discussed. In addition, non-noble transition metals in N4-chelate complexes can reduce oxygen electrochemically. Fe and Co are cheap alternative catalysts for ORR. In most cases, the stability and tolerance issues are overcome well, but their overall performances don＇t seem to surpass Pt/C catalyst yet,

关键词： Graphene Oxygen reduction reaction Electrocatalyst Nanocatalyst

Development of a Specific CHIKV-E2 Monoclonal Antibody for Chikungunya Diagnosis

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Virologica Sinica 2019年第5期34卷 563-571页

作者： Jaemoo Kim Jihyun Yang Young bong Kim Hee-Jung lee Sehyun Kim Haryoung Poo Infectious Disease Research Center Korea Research Institute of Bioscience and BiotechnologyDaejeon 34141Republic of Korea Department of Biosystems and Bioengineering University of Science and TechnologyDaejeon 34113Republic of Korea Department of Biomedical Science and Engineering Konkuk UniversitySeoul 05029Republic of Korea Department of Bio-Industrial Technologies Konkuk UniversitySeoul 05029Republic of Korea

Chikungunya fever is a vector-borne viral disease transmitted to humans by chikungunya virus(CHIKV)-infected *** have been many outbreaks of CHIKV infection worldwide,and the virus poses ongoing risks to global *** prevent and control CHIKV infection,it is important to improve the current CHIKV diagnostic approaches to allow for the detection of low CHIKV concentrations and to correctly distinguish CHIKV infections from those due to other mosquito-transmitted viruses,including dengue virus(DENV),Japanese encephalitis virus(JEV),and Zika virus(ZIKV).Here,we produced monoclonal antibodies(mAbs)against the CHIKV envelope 2 protein(CHIKV-E2)and compared their sensitivity and specificity with commercially available mAbs using enzyme-linked immunosorbent assays(ELISA).Two anti-CHIKV-E2 mAbs,19-1 and 21-1,showed higher binding affinities to CHIKV-E2 protein than the commercial mAbs *** particular,the 19-1 mAb had the strongest binding affinity to inactivated ***,the 19-1 mAb had very little cross-reactivity with other mosquito-borne viruses,such as ZIKV,JEV,and *** results suggest that the newly produced anti-CHIKV-E2 mAb,19-1,could he used for CHIKV diagnostic approaches.

关键词： Chikungunya virus(CHIKV) Envelope 2 Monoclonal antibody Diagnosis• Sensitivity Specificity

Nano-precision combined process of electrolytic in-process dressing grinding and magnetic assisted polishing on optics glass material

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中国有色金属学会会刊：英文版 2009年第B9期19卷 301-306页

作者： Tae-Soo KWAK Yong-Chul lee Gyung-Nyun KIM Dae-bong CHOI Mikio YAMANOI Hitoshi OHMORI Department of Mechanical Engineering Jinju National University

This study is focused on the application of an effective fabrication method combining electrolytic in-process dressing(ELID) grinding and magnetic assisted polishing(MAP) to nano-precision mirror surface grinding on the optics glass-ceramic named Zerodure that is commonly used in precision optics components. The results show the variation of surface roughness after MAP processes utilizing Fe+CeO2, Fe+CeO2+diamond paste and Fe+diamond paste are applied to ELID ground surfaces. The MAP surface roughnesses for ELID ground surface roughnesses(Ra) of 52.1, 39.8 and 51.1 nm using #1200 grinding wheel are improved to 6.1, 4.6 and 1.9 nm, respectively. The surface roughness of MAP process using Fe+CeO2+diamond paste is superior to that using other processes. Moreover, it takes less than 10 min to conduct the MAP processes. The combined method suggested effectively reduces the working time to get the required surface qualities.

关键词：在线电解修整光学玻璃纳米相抛光材料电解过程表面粗糙度地面粗糙度磨削

Obesity is an important determinant of severity in newly defined metabolic dysfunction-associated fatty liver disease

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Hepatobiliary & Pancreatic Diseases International 2022年第3期21卷 241-247页

作者： Ji Hye Huh Kwang Joon Kim Seung Up Kim bong-Soo Cha Byung-Wan lee Division of Endocrinology and Metabolism Department of Internal MedicineHallym University Sacred Heart HospitalAnyang 14068Korea Division of Geriatrics Department of Internal MedicineYonsei University College of MedicineSeoul 03722Korea Division of Endocrinology and Metabolism Department of Internal MedicineYonsei University College of MedicineSeoul 03722Korea Institute of Gastroenterology Department of Internal MedicineYonsei University College of MedicineSeoul 03722Korea

Background: The recently proposed definition of metabolic dysfunction-associated fatty liver disease(MAFLD) is based on the co-existence of hepatic steatosis with other metabolic disorders, including obesity and metabolic risk abnormalities such as hyperglycemia, high blood pressure and dyslipidemia. This study aimed to assess MAFLD severity according to the presence of metabolic abnormalities and obesity. Methods: Using transient elastography, hepatic steatosis and fibrosis severity were assessed by measuring the controlled attenuation parameter and liver stiffness measurement. A total of 1163 patients with MAFLD were categorized into the following four groups according to metabolic risk abnormalities and obesity presence: non-obese without metabolic risk abnormality group(Group 1;reference group);nonobese with metabolic risk abnormality group(Group 2);obese without metabolic risk abnormality group(Group 3);and obese with metabolic risk abnormality group(Group 4). A multiple logistic regression analysis was performed to determine severe hepatic steatosis and fibrosis risk in each group in both unadjusted and adjusted models. Results: In the adjusted model, the odds ratios(ORs) [95% confidence interval(CI)] for severe hepatic steatosis in Groups 2, 3, and 4 were 1.07(0.61-1.88), 2.43(1.44-4.08), and 4.07(2.56-6.48), respectively( P trend < 0.001). For liver fibrosis, compared with Group 1, Group 2 showed no significant increases in OR, whereas Groups 3 and 4(obese groups) showed significant increases(OR = 4.70, 95% CI: 1.24-17.82 and OR = 6.43, 95% CI: 1.88-22.02, respectively). Conclusions: Obesity, rather than metabolic abnormality, is the principal determinant of severe hepatic steatosis and fibrosis in patients with MAFLD.

关键词： Metabolic dysfunction-associated fatty liver disease Metabolically-healthy obesity Liver fibrosis

Effect of incision types for Artisan phakic intraocular lens implantation on ocular higher order aberrations

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International Journal of Ophthalmology(English edition) 2016年第12期9卷 1785-1789页

作者： Young Min Park bong Joon Choi Jong Soo lee Department of Ophthalmology Gyeongsang National University School of Medicine Gyeongsang National University Changwon Hospital 11 Samjeongja-ro Seongsan-gu Changwon-si Gyeongsangnam-do 51472 Korea lee Eye Clinic Pusan 47524 Korea Department of Ophthalmology School of Medicine Pusan National University and Medical Research Institute Pusan National University Hospital Pusan 602-739 Korea

AIM： To evaluate the effect of incision types for Artisan phakic intraocular lens （PIOL） implantation on ocular higher-order aberrations （HOAs）.METHODS： A retrospective review was conducted of the patients who had undergone Artisan PIOL implantation for the correction of myopia and followed up for at least 6mo. Patients are classified into 2 groups considering the incision type： cornea group with patients undergone clear corneal incision; sclera group with patients undergone sclera tunnel incision. All patients with postoperative astigmatism of under 1 diopter （D） were included to minimize the effect of residual astigmatism on postoperative HOAs. Visual acuity, special equivalents, astigmatism, predictability （±1 D from target refraction）, HOAs （coma, trefoil, spherical aberration）, and corneal endothelial counts were analyzed preoperatively and 6mo ***： At the postoperative 6mo, all patients of both groups achieved uncorrected visual acuity of 16/20 or better, and significantly decreased the spherical equivalents compared with preoperative values. The predictability of refractive correction was 96% in the former, and 94% in the latter. Unlike the sclera group, preoperative astigmatism decreased significantly in cornea group at postoperative 6mo. The HOAs increased significantly at postoperative 6mo compared to the preoperative values in both groups, and the root mean square （RMS） total and trefoil wavefront aberration of cornea group were significantly higher than those of sclera ***： Although corneal incision significantly reduces preexisting astigmatism, the postoperative 6mo of total RMS and trefoil aberration change may deteriorate the visual quality after Artisan PIOL implantation.

关键词： Artisan astigmatism higher-order aberrations incision phakic intraocular lens

Synthesis and Gas Sensing of TiO_2 Ultrafine Powders by Precipitating

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稀有金属材料与工程 2006年第A3期35卷 163-164页

作者： Min-Hyun Seo bong-Ho lee Jong-Won Kim Gi-Hong Rue Duk-Dong lee Jeung-Soo Huh Department of Sensor and Display Engineering Kyungpook National UniversitySangyuk-DongBukguDaegu 1370Korea Department of Materials Science and Metallurgy Kyungpook National UniversitySangyuk-DongBukguDaegu 1370Korea Department of Nano-science and Technology Kyungpook National UniversitySangyuk-DongBukguDaegu 1370Korea School of Electronic Engineering Kyungpook National UniversitySangyuk-DongBukguDaegu 1370Korea Department of Sensor and Display Engineering Kyungpook National UniversitySangyuk-DongBukguDaegu 1370Korea.Department of Nano-science and TechnologyKyungpook National UniversitySangyuk-DongBukguDaegu 1370Korea

We investigated the gas sensing characteristics of rutile and anatase TiO_2 nano-particle sensors for chemical warfare ***_2 nano-powders with rutile and anatase structure were fabricated by controlling pH value without heat treatment *** mean particle size of TiO_2 powders were below 10 ***-prepared TiO_2 powders have several advantages of nano particle size and high surface area and could be a prominent candidate for ***_2 sensors were examined with DMMP for chemical warfare agents detection.

关键词： TiO2 chemical warfare agents sensor nano-sensor pH

In?uence of Carbon Equivalent Value on the Weld Bead Bending Properties of High-Strength Low-Alloy Steel Plates

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Journal of Materials Science & Technology 2017年第4期33卷 321-329页

作者： Ki Hyuk Kim In Jun Moon Ki Won Kim Ki bong Kang Byung Gyu Park Kwang Seok lee R&D Center of Dongkuk Steel Mill Co. Ltd Pohang 790-729 South Korea Korea Institute of Materials Science Implementation Research Division Materials Deformation Department 797 Changwondaero Changwon Gyeongnarn642-831 South Korea

The contribution of chemical compositions in terms of carbon equivalent value（CEV） on impending crack propagation during weld bead bend tests（WBBTs） was studied with five different high-strength lowalloy steel plates that underwent different rolling processes. The test showed that cracks developed at the weld joint, easily passed through the coarse-grain heat-affected zone（CGHAZ）, and finally were arrested within the heat-affected zone（HAZ）. An apparent decrease in the average crack length, which consequently indicated improvement in crack arrestability, was found with decreasing CEV. In addition,the relatively fine microstructure in the HAZ of low-CEV steel plates helped in preventing the crack from further propagation. Special emphasis was placed on the empirical expectation of critical CEV above which WBBT might fail.

关键词： Mechanical characterization Steel Welding Fracture Crack arrestability against bending

Antioxidant activity and free radical scavenging activities of Streptomyces *** MJM 10778

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Asian Pacific Journal of Tropical Medicine 2014年第12期7卷 962-967页

作者： Dong-Ryung lee Sung-Kwon lee bong-Keun Choi Jinhua Cheng Young-Sil lee Seung Hwan Yang Joo-Won Suh Division of Bioscience and Bioinformatics Myongji UniversityYoungin-siGyeonggi-do 449728Korea Center for Neutraceutical and Pharmaceutical Materials Myongji UniversityYongin-siGyeonggi-do 449728Korea

Objective:To investigate the antioxidant activity of soil-borne ***:The total phenolic contents,the level of antioxidant potential by DPPH radical scavenging activity,MO scavenging activity,and ABTS radical scavenging activity in ethyl acelale extract were ***:The 16 S rDNA sequencing analysis revealed that Streptomyces *** MJM *** was isolated from Hambak ***,has 99.9% similarity to Streptomyces misionensis(***) NBRC *** physiological and the morphological test revealed that the strain MJM 10778 has different characteristics from the strain *** entire antioxidant assay with the ethyl acelale extract displayed good radical scavenging *** IC_(50) values of the strain MJM 10778 extract on DPPH,.*** ABTS radicals were identified to he 92.8 μg/mL,0.02 μg/ml,and 134.9 μg/mL,*** ethyl acetate extract of the strain MJM 10778 showed an 81.500% of cell viability at 100 μg/mL in Raw264.7cell viability ***:The results obtained suggesl that the ethyl acetate extract of Streptomyces *** MJM 10778 could be considered as a potential source of drug for the diseases that is caused by free radicals with its anti-oxidant activities and low cytotoxicity.

关键词： Streptomyces sp.strain MJM 10778 Antioxidant activity DPPH radical scavenging assay NO radical scavenging assay