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CO_(2)-adsorbent spongy electrode for non-aqueous Li–O_(2) batteries

Journal of Energy Chemistry 2022年第2期31卷 646-653页

作者： Yiseul Yoo Giseung Lee Min-Gi Jeong Hun-Gi Jung Sunghee Shin Dongjin Byun Taeeun Yim hee-dae lim Center for Energy Storage Research Korea Institute of Science and Technology(KIST)Hwarang-ro 14-gil 5Seongbuk-guSeoul 02792Republic of Korea Department of Materials Science and Engineering Korea University145 Anam-roSeongbuk-guSeoul 02841Republic of Korea Department of Chemistry Incheon National University119 Academy-roYeonsu-guIncheon 22012Republic of Korea Department of Chemical and Biological Engineering Korea UniversitySeoul 02841Republic of Korea

Regulation of the Li_(2)CO_(3) byproduct is the most critical challenge in the field of non-aqueous Li–O_(2) *** considerable efforts have been devoted to preventing Li_(2)CO_(3) formation,no approaches have suggested the ultimate solution of utilizing the clean Li_(2)O_(2) reaction instead of that of Li_(2)CO_(3).Even if extremely pure O_(2) is used in a Li–O_(2) cell,its complete elimination is impossible,eventually generating CO_(2) gas during *** this paper,we present the new concept of a CO_(2)-adsorbent spongy electrode(CASE),which is designed to trap the evolved CO_(2) using adsorption *** candidates composed of amine functional groups(–NH2)for capturing CO_(2) were screened,with quadrapurebenzylamine(QPBZA)exhibiting superior CO_(2)-adsorbing ability among the proposed ***,we fabricated the CASE by sandwiching QPBZA between porous carbon layers,which facilitated the transport of gaseous *** new electrode was demonstrated to effectively capture the evolved CO_(2) during charge,therefore altering the reaction pathways to the ideal *** is highly advantageous to mitigate the undesirable CO_(2) incorporation in the next discharge,resulting in improved *** novel concept of a CO_(2)-sponging electrode provides an alternative route to the realization of practically meaningful Li–O_(2) batteries.

关键词： Li-O_(2)battery Benzylamine CO_(2)adsorption Li_(2)CO_(3) Li_(2)O_(2) CO_(2)-sponging electrode

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Comprehensive molecular characterization to predict immunotherapy response in advanced biliary tract cancer:a phase II trial of pembrolizumab

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Oncology Research 2025年第1期33卷 57-65页

作者： RYUL KIM JOO KYUNG PARK MINSUK KWON MINAE AN JUNG YONG HONG JOON OH PARK SUNG hee lim SEUNG TAE KIM Division of Hematology-Oncology Department of MedicineSamsung Medical CenterSungkyunkwan University School of MedicineSeoulKorea Division of Gastroenterology Department of MedicineSamsung Medical CenterSungkyunkwan University School of MedicineSeoulKorea Department of Hematology-Oncology Ajou University School of MedicineSuwon-siGyeonggi-doKorea Samsung Advanced Institute of Health Science and Technology Sungkyunkwan University School of MedicineSeoulKorea

Background:Immune checkpoint inhibitors(ICIs)are effective in a subset of patients with metastatic solid ***,the patients who would benefit most from ICIs in biliary tract cancer(BTC)are still *** and methods:We molecularly characterized tissues and blood from 32 patients with metastatic BTC treated with the ICI pembrolizumab as second-line ***:All patients had microsatellite stable(MSS)type *** of the 32 patients achieved partial response(PR),with an objective response rate(ORR)of 9.4%(95%confidence interval[CI],2.0–25.2)and nine showed stable disease(SD),exhibiting a disease control rate(DCR)of 37.5%(95%CI,21.1–56.3).For the 31 patients who had access to PD-1 ligand 1(PD-L1)combined positive score(CPS)testing(cut-off value≥1%),the ORR was not different between those who had PD-L1-positive(PD-L1+;1/11,9.1%)and PDL1-(2/20,10.0%)tumors(p=1.000).The tumor mutational burden(TMB)of PD-L1+BTC was comparable to that of PD-L1-BTC(p=0.630).TMB and any exonic somatic mutations were also not predictive of pembrolizumab *** analysis of blood and tumor samples demonstrated a relatively high natural killer(NK)cell proportion in the peripheral blood before pembrolizumab treatment in patients who achieved tumor ***,the tumors of these patients presented high enrichment scores for NK cells,antitumor cytokines,and Th1 signatures,and a low enrichment score for cancer-associated ***:This study shows the molecular characteristics associated with the efficacy of pembrolizumab in BTC of the MSS type.

关键词： Pembrolizumab Whole-exome sequencing Whole-transcriptome sequencing Biliary tract cancer

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High‑Performance Thick Cathode Based on Polyhydroxyalkanoate Binder for Li Metal Batteries

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Advanced Fiber Materials 2024年第1期6卷 214-228页

作者： Dong Hyuk Kang Minhyuck Park Jeonghun Lee Chan Yeol Kim Jimin Park Youn‑Ki Lee Jong Chan Hyun Son Ha Jin Hwan Kwak Juhee Yoon Hyemin Kim Hyun Soo Kim Do Hyun Kim Sangmin Kim Ji Yong Park Robin Jang Seung Jae Yang hee‑dae lim Se Youn Cho Hyoung‑Joon Jin Seungjin Lee Yunil Hwang Young Soo Yun KU‑KIST Graduate School of Converging Science and Technology Korea University145 Anam‑roSeongbuk‑guSeoul 02841South Korea Carbon Composite Materials Research Center Korea Institute of Science and Technology(KIST)92 Chundong‑roBongdong‑eupWanju‑gunJeollabuk‑do 55324South Korea Energy Storage Research Center Korea Institute of Science and Technology(KIST)514‑gil Hwaraong‑roSeoul 02792South Korea Program in Environmental and Polymer Engineering Inha University100 Inha‑ro Michuhol‑guIncheon 22212South Korea Advanced Analysis Data Center Korea Institute of Science and Technology(KIST)514‑gil Hwaraong‑roSeoul 02792South Korea Advanced Nanohybrids Laboratory Department of Chemistry and Chemical EngineeringInha University100 Inha‑roMichuhol‑guIncheon 22212South Korea CJ CheilJedang Corporation 55 Gwanggyo‑ro 42Beon‑gilYeongtong‑guSuwon 16495South Korea Department of Chemical Engineering Hanyang University222 Wangsimni‑roSeongdong‑guSeoul 04763South Korea Department of Integrative Energy Engineering Korea University145 Anam‑roSeongbuk‑guSeoul 02841South Korea

Thick cathodes can overcome the low capacity issues,which mostly hamper the performance of the conventional active cathode materials,used in rechargeable Li ***,the typical slurry-based method induces cracking and flaking during the fabrication of thick *** addition,a significant increase in the charge-transfer resistance and local cur-rent overload results in poor rate capabilities and cycling stabilities,thereby limiting electrode *** this study,a synergistic dual-network combination strategy based on a conductive nanofibrillar network(CNN)and a nano-bridging amor-phous polyhydroxyalkanoate(aPHA)binder is used to demonstrate the feasibility of constructing a high-performance thick *** CNN and aPHA dual network facilitates the fabrication of a thick cathode(≥250μm thickness and≥90 wt%active cathode material)by a mass-producible slurry *** thick cathode exhibited a high rate capability and excel-lent cycling *** addition,the thick cathode and thin Li metal anode pair(Li//t-NCM)exhibited an optimal energy performance,affording high-performance Li metal batteries with a high areal energy of~25.3 mW h cm^(-2),a high volumetric power density of~1720 W L^(-1),and an outstanding specific energy of~470 W h kg^(-1)at only 6 mA h cm^(-2).

关键词： Thick cathode Polyhydroxyalkanoate binder Nano-bridging Conductive nano-fibrillar network Lithium metal battery

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Nasal cavity fungus ball discovered accidentally:A case report

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World Journal of Clinical Cases 2025年第5期13卷 44-48页

作者： dae-Neung Lee Dong Hoon Lee Sang Chul lim Department of Otolaryngology-Head and Neck Surgery Chonnam National University Medical SchoolChonnam National University Hwasun HospitalHwasun 58128South Korea Department of Otolaryngology-Head and Neck Surgery Chonnam National University Medical SchoolHwasun HospitalChonnam National University Hwasun HospitalHwasun 58128South Korea Department of Otolaryngology-Head and Neck Surgery Chonnam National University Medical SchoolKwangju 501190South Korea

BACKGROUND Fungal balls within the nasal cavity are an exceedingly rare clinical entity,typically presenting with nonspecific symptoms or being identified *** SUMMARY This report presents an incidental discovery of a fungal ball in the nasal cavity during routine imaging,with no associated clinical *** This case underscores the importance of considering the possibility of asympto-matic presentations of nasal fungal balls,which may be detected incidentally during imaging evaluations.

关键词： Fungi Mycoses Fungus ball Nasal cavity Nasal surgical procedures Case report

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A case of gouty arthritis following percutaneous radiofrequency ablation for hepatocellular carcinoma

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World Journal of Gastroenterology 2010年第6期16卷 778-781页

作者： dae hee Choi Hyo-Suk Lee Department of Internal Medicine Kangwon National University College of Medicine Department of Internal Medicine and Liver Research Institute Seoul National University College of Medicine

Percutaneous radiofrequency thermal ablation(RFA) is considered an effective technique for providing local control in the majority of Hepatocellular carcinoma(HCC) *** RFA is generally well tolerated,recent studies have reported complications associated with *** describe a case of acute gouty arthritis in a 71-year-old man with chronic renal failure who was treated with RFA for a HCC lesion and who had hepatitis B-associated cirrhosis and mild renal *** surveillance of the patient detected a 3.5 cm HCC *** the patient had declined surgery,RFA was chosen for *** the third post-procedural day,the laboratory results showed increases in his uric acid and potassium levels,which were compatible with a tumor lysis syndrome. On the 6th post-procedural day,the patient complained of new right knee *** joint aspiration revealed monosodium urate monohydrate *** made the diagnosis of acute gouty arthritis arising from tumor lysis and liver infarction caused by HCC ablation,which was aggravated by acute renal insufficiency. After adequate hydration and administration of oral colchicines,the patient's right knee pain subsided andthe uric acid serum level returned to *** is the first described case of acute gouty arthritis after RFA for a HCC lesion in a patient with underlying chronic renal *** avoid hyperuricemia and an acute attack of gout after RFA therapy for HCC,early identification of patients at risk is warranted,such as those with a large tumor,rapid tumor growth,and renal insufficiency,and preventative measures should be considered.

关键词： Radiofrequency thermal ablation Hepatocellular carcinoma Gout Tumor lysis syndrome Complications

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Development of polyimide films reinforced with boron nitride and boron nitride nanosheets for transparent flexible device applications

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Nano Research 2018年第5期11卷 2366-2378页

作者： You Jin Min Kyeong-hee Kang dae-Eun Kim Department of Mechanical Engineering Yonsei University 50 Yonsei-ro Seodaemun-gu Seoul 03722 Republic of Korea

The benefits of reinforcing polyimide （PI） films with boron nitride （BN） particles and boron nitride nanosheets （BNNSs） were assessed with the aim of enhancing their thermal, optical, and mechanical properties for flexible device applications. BNNSs were prepared from BN particles using a liquid-phase exfoliation method assisted by an ultrasonic probe-type sonicator and centrifugator. PI-based composite films blended with BNNSs and BN particles were fabricated at various concentrations via mechanical stirring and spin coating. The transparency of the PI/BNNS composite films remained almost the same as that of pure PI films up to 3 wt.% whereas the transparency of the PI/BN composite films decreased with increasing concentration of the BN fillers at 550 nm. The thermal stability improved significantly with increasing concentrations of both BN and BNNS relative to that of pure PI films. The temperature for 5% weight loss of the PI/BNNS composite film was higher than that of the PI/BN composite film at the same filler concentration. The composite films with 2 wt.% BN or BNNS showed the lowest wear rate, and the PI/BNNS composite films showed more stable frictional behavior compared to the PI/BN composite films. In addition, bending tests showed that the PI/BNNS composite films exhibited excellent flexibility compared to the PI/BN composite films. Overall, the results indicate that the BNNS can be effectively used as a filler that can enhance the thermal and mechanical properties of polymer materials for flexible device applications.

关键词： polyimide (PI) boron nitride (BN) transparency thermal properties flexibility tribology

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Optimization of post-warranty sequential inspection for second-hand products

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Journal of Systems Engineering and Electronics 2017年第4期28卷 793-800页

作者： dae-Kyung Kim Jae-Hak lim Dong Ho Park Department of Statistics Chonbuk National University Department of Management & Accounting Hanbat National University Industry Academic Cooperation Foundation Hallym University

This paper considers an optimal sequential inspection schedule for a second-hand product after that the free nonrenewable warranty is expired. The length of warranty is prespecified and during the warranty period, the product is minimally repaired by the dealer when it fails. Following the expiration of the non-renewing warranty, the product is inspected and upgraded sequentially a fixed number of times at the expenses of the *** each inspection, the failure rate of the product is reduced proportionally so that the product is upgraded. The product is assumed to deteriorate as it ages and the replacement of the product occurs when a fixed number of inspections are rendered. In addition,the intervals between two successive inspections are assumed to decrease monotonically. The main objective of this paper is to determine the optimal improvement level to upgrade the product at each inspection so that the expected maintenance cost during the life cycle of the product is minimized from the perspective of the customer. Under the given cost structures, we derive an explicit formula to obtain the expected maintenance cost incurred during the life cycle of the product and discuss the method to find the optimal level of the improvement analytically in case the failure times follow the Weibull distribution. Numerical results are analyzed to observe the impact of relevant parameters on the optimal solution.

关键词： second-hand product sequential inspection upgrade action life cycle of the product expected maintenance cost free non-renewable warranty

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Model development to estimate site index values for six major tree species in North Korea

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Journal of Forestry Research 2023年第2期34卷 387-400页

作者： Sohee Park A-Ram Yang Eun-hee Kim Joongbin lim Division of Global Forestry Department of Future Forest StrategyNational Institute of Forest ScienceSeoul 02455Republic of Korea Forest ICT Research Center National Institute of Forest ScienceSeoul 02455Republic of Korea

Due to considerable deforestation in North Korea,there is a need to plan forest restoration programs based on scientific forest *** this study,a methodology was developed for estimating the site index values of six major tree species and the forest productivity *** site index values of these tree species were derived in South Korea using the Chapman-Richards *** values were used with data from the 6th National Forest Inventory,which included 20 types of edaphic,topographic,and climatic factors,and random forest analysis—a widely used machine learning technique for spatial prediction—to develop a new model for estimating the site index values of these species across South *** prediction accuracy of this model was evaluated using the root mean square *** results show that the prediction accuracy was high,with a root mean square error of~***,the importance of the variables related to climate and geography was generally *** proposed site index estimation model for six tree species was applied across North Korea,and its effectiveness tested by comparing the estimated values with those reported in literature from North *** differences between the model outputs and recorded data in the northern alpine regions were presumably due to the lack of data for high-altitude regions in South *** model is based on the determination of the suitability of tree species in restoration ***,it can contribute to the evaluation of forest productivity in North Korea and may help plan efficient forest restoration programs.

关键词： Environmental factors Forest productivity Machine learning North Korea Random forest Site index

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Discovery of Zr-based metal-organic polygon:Unveiling new design opportunities in reticular chemistry

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Nano Research 2021年第2期14卷 392-397页

作者： Jiyeon Kim Dongsik Nam Hiroshi Kitagawa dae-Woon lim Wonyoung Choe Department of Chemistry Ulsan National Institute of Science and Technology50 UNIST-gilUlsan 44919Republic of Korea Department of Chemistry Graduate School of ScienceKyoto UniversityKitashirakawa Oiwake-choSakyo-kuKyoto 606-8502Japan Department of Chemistry and Medical Chemistry College of Science and TechnologyYonsei University1 Yonseidae-gilWonjuGangwon-do 26493Republic of Korea

Metal-based secondary building unit and the shape of organic ligands are the two crucial factors for determining the final topology of metal-organic materials.A careful choice of organic and inorganic structural building units occasionally produces unexpected structures,facilitating deeper fundamental understanding of coordination-driven self-assembly behind metal-organic ***,we have synthesized a triangular metal-organic polygon(MOT-1),assembled from bulky tetramethyl terephthalate and Zr-based secondary building ***,the Zr-based secondary building unit serves as an unusual ditopic Zr-connector,toform metal-organic polygon MOT-1,proven to be a good candidate for water adsorption with *** study highlights the interplay of the geometrically frustrated ligand and secondary building unit in controlling the connectivity of metal-organic *** a strategy can be further used to unveil a new class of metal-organic materials.

关键词： reticular chem istry Zr-based metal-organic polygon geometrical frustration ditopic secondary building unit

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Compensation of image noise induced by difference in optical characteristics of array-LED chips of LED print head

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Science China(Technological Sciences) 2017年第12期60卷 1819-1830页

作者： KIM Wan-Chin PARK Yong-Shik KIM Sung-dae lim Jiseok Department of Automotive Engineering Honam University Gwansan-gu Gwangju 62399 Korea Mangoslab Co. Ltd. Startupeampus 20 Pangyo-ro 289beon-gil Bundang-gu Seongnam-si Gyeonggi-do 13488 Korea S-Printing Solution Co. Ltd. (Samsung Electronics Ltd) Suwon Gyeonggi-do 443-742 Korea School of Mechanical Engineering Yeungnam University Gyeongsan Gyeongbuk 38541 Korea

There are various applied electro-optical devices, which utilize light emitting didoe(LED) chip array for applications to displays and opto-electronic sensors. In those devices, it is the one of the critical technical issues to minimize uncertain fluctuations including optical power and optical density. Due to variation in operating environment of a device, those are not corrected precisely by controlling parameters based on simple relation between parameters and resultant abovementioned ***, there is essential need to correct outputs in real-time based on correction function generated from the consideration on various operation condition. In this article, we introduce an output correction method through reporting real-time image noise reduction in the application to electro-photography with LED print head. In the technology of LED print head, as differences in optical characteristics between each LED cause vertical image noise, it should be corrected in order to obtain images that are comparable or better in quality compared to those produced by the conventional laser scanning method. Even though it seems that the method used to obtain uniform light power from each LED can solve this problem, it does not work well for high-resolution printing. Therefore, a scan method involving correction by a printed and scanned pattern is introduced through this work. The scan method is composed of correction patterns to minimize printing noise by its shape, the correction algorithm to calculate the optimized value and the printing algorithm to control gray levels in real-time precisely. We believe that the developed correction method upgrades the printing quality of the LPH printer better than commercial printers. The developed correction method can also be applied to various application areas that use an array-type light source such as display systems and lighting systems.

关键词： real-time image correction LED print head(LPH) vertical image noise electro-photography temporal correction spatial correction

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