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Anion storing,oxygen vacancy incorporated perovskite oxide composites for high-performance aqueous dual ion hybrid supercapacitors

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Journal of Energy Chemistry 2024年第7期94卷 646-655页

作者： taehun kang Puritut Nakhanivej Kyung Jae Wang Yu Chen Yongchul G Chung Ho Seok Park School of Chemical Engineering Sungkyunkwan University(SKKU)2066Seobu-roJangan-guSuwonGyeonggi-do 16419Republic of Korea Warwick Manufacturing Group(WMG) University of WarwickCoventry CV47ALUnited Kingdom School of Chemical Engineering Pusan National UniversityGeumjeong-guBusanGyeongsangnam-do 46241Republic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan University2066SeoburoJangan-guSuwon 440-746Republic of Korea SKKU Advanced Institute of Nano Technology(SAINT) Sungkyunkwan University2066SeoburoJangan-guSuwon 440-746Republic of Korea Department of Health Sciences and Technology Samsung Advanced Institute for Health Sciences and Technology(SAIHST)Sungkyunkwan UniversitySuwon 16419Republic of Korea

Dual ion storage hybrid supercapacitors(HsCs)are considered as a promising device to overcome the limited energy density of existing supercapacitors while preserving high power and long ***,the development of high-capacity anion-storing materials,which can be paired with fast charg-ing capacitive electrodes,lags behind cation-storing ***,we demonstrate the surface faradaic OH-storage mechanism of anion storing perovskite oxide composites and their application in high-performance dual ion *** oxygen vacancy and nanoparticle size of the reduced LaMnO_(3)(r-LaMnO_(3))were controlled,while r-LaMnO_(3) was chemically coupled with ozonated carbon nanotubes(oCNTs)for the improved anion storing capacity and cycle *** taken by in-situ and ex-situ spectroscopic and computational analyses,OH-ions are inserted into the oxygen vacancies coordi-nating with octahedral Mn with the increase in the oxidation state of Mn during the charging process or vice *** OH-storing r-LaMnO_(3)/oCNT composite with Na*storing MXene,the as-fabricated aqueous dual ion HSCs achieved the cycle performance of 73.3%over 10,000 cycles,delivering the max-imum energy and power densities of 47.5 w h kg^(-1) and 8 kw kg^(-1),respectively,far exceeding those of previously reported aqueous anion and dual ion storage *** research establishes a foundation for the unique anion storage mechanism of the defect engineered perovskite oxides and the advancement of dual ion hybrid energy storage devices with high energy and power densities.

关键词： Anion storage Dual ion storage Defect engineered perovskites Hybrid supercapacitors Nanocomposites

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MXene ink hosting zinc anode for high performance aqueous zinc metal batteries

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Journal of Energy Chemistry 2023年第1期76卷 187-194,I0005页

作者： Jae Min Park Milan Jana Sang Ha Baek taehun kang Peixun Xiong Jeong Hee Park Jun Soo Kim Ali Shayesteh Zeraati Mikhail Shekhirev Paul V.Braun Yury Gogotsi Ho Seok Park School of Chemical Engineering Sungkyunkwan University2066SeoburoJangan-guSuwon 440-746Republic of Korea Department of Chemical and Petroleum Engineering University of Calgary2500 University Dr NWCalgary T2N 1N4Canada Department of Materials Science and Engineering Materials Research LaboratoryBeckman Institute for Advanced Science and TechnologyUniversity of Ilinois at Urbana-ChampaignUrbanaIL61801USA A.J.Drexel Nanomaterials Institute and Department of Materials Science and Engineering Drexel UniversityPhiladelphiaPA 19104USA SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan University2066SeoburoJangan-guSuwon 440-746Republic of Korea SKKU Advanced Institute of Nano Technology(SAINT) Sungkyunkwan University 2066SeoburoJangan-guSuwon 440-746Republic of Korea

Despite the safety,low cost,and high theoretical capacity(820 mA h g^(-1))of Zn metal anodes,the practical application of aqueous Zn metal batteries remains a critical challenge due to the Zn dendrite growth,corrosion,and hydrogen evolution ***,we demonstrate the MXene ink hosting Zn metal anodes(MX@Zn)for high-performance and patternable Zn metal full *** as-designed MX@Zn electrode is more facile and reversible than bare Zn and CC@Zn,as verified by better cyclic stability and lower overpotentials of symmetric cells with the plating capacity of 0.05 mA h cm^(-2)at 0.1 m A cm^(-2)and of 1 m A h cm^(-2)at 1 m A cm^(-2).The MX@Zn|MnO_(2)full cells deliver a high specific capacity of 281.9 m A h g^(-1),91.5%of the theoretical capacity,achieving 50%capacity retention from 60 mA g^(-1)to 300 mA g^(-1)and 79.7%of initial capacity after 200 ***,the patterned devices based on the MX@Zn electrode achieve high energy and power densities of 348.57 Wh kg^(-1)and 1556 W kg^(-1),respectively,along with a capacity retention of 64%and Coulombic efficiency of 99%over 500 *** high performance of MX@Zn is attributed to the high electrical conductivity and hydrophilicity of MXene and rapid ion diffusion through the 3D interconnected porous channels.

关键词： MXene ink Zinc anode Metal batteries Patterning Electrodeposition

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Effects of Inertia and Viscosity on Single Droplet Deformation in Confined Shear Flow

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Communications in Computational Physics 2013年第3期13卷 706-724页

作者： Samaneh Farokhirad taehun Lee Jeffrey F.Morris Department of Mechanical Engineering City College of City University of New YorkNew YorkNew York 10031USA Department of Chemical Engineering and Levich Institute City College of City University of New YorkNew YorkNew York 10031USA

Lattice Boltzmann simulations based on the Cahn-Hilliard diffuse interface approach are performed for droplet dynamics in viscous fluid under shear flow,where the degree of confinement between two parallel walls can play an important *** effects of viscosity ratio,capillary number,Reynolds number,and confinement ratio on droplet deformation and break-up in moderately and highly confined shear flows are investigated.

关键词： Lattice Boltzmann method droplet deformation confinement

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Is Osteosarcoma between the Two Peak Ages Different?

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Journal of Cancer Therapy 2018年第1期9卷 64-78页

作者： taehun Kim Hak Sun Chung Wan-Hyeong Cho Dae-Geun Jeon So Hak Chung Department of Orthopaedic Surgery Kosin University Gospel Hospital Busan Republic of Korea Department of Orthopaedic Surgery Korea Cancer Center Hospital Seoul Republic of Korea

Background: Unlike two known peak age groups (10 - 14 and older than 65 years of age), there was relatively scant attention in osteosarcoma patients between them, and previous reports had analyzed other than Asians. Therefore we conducted this study with Korean patients and focused on 20 - 40 years of age, then investigated age-specific or race-specific meaningful outcomes. Materials and Methods: 379 patients who were newly diagnosed as osteosarcoma in two Korean major cancer hospitals from September 1986 to July 2015 with more than 2-year follow-up were retrospectively studied. There were 290 patients with 20 - 40 years of age, 60 patients aged 19 or younger, and 29 patients aged 41 or older. Age at diagnosis, gender, location of primary lesion, metastasis at diagnosis, histologic subtypes, histologic response were analyzed as prognostic factors by overall survival (OS) and event-free survival (EFS) rates. Results: Primary pelvic lesion and poor histologic response were significantly unfavorable prognostic factors, but not age-specific. However, proportion of metastasis at diagnosis was significantly highest in 20 - 40 years of age group. For the age at diagnosis, older patients presented poorer 5-year OS and EFS rates, but for 10-year, 20 - 40 years of age group showed unusually better prognosis than younger age’s, with statistic significance in OS rates but not in EFS rates. Conclusion: Osteosarcoma patients with 20 - 40 years of age in Korea presented relatively better prognosis after longer-term 10-year despite their late diagnosis causing more metastasis at diagnosis, which emphasized expedite diagnosis and appropriate treatment to expect much better prognosis than peak age groups.

关键词： Osteosarcoma Age Young Adult Outcome Prognosis

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文丘里分液器内气液两相流动行为的数值模拟

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家电科技 2024年第S01期 147-150页

作者：代传民张蕊赵红雷郝奇金兑宪耿佃桥青岛海尔智能技术研发有限公司山东青岛266103 东北大学材料电磁过程研究教育部重点实验室辽宁沈阳110819 东北大学冶金学院辽宁沈阳110819

采用CFD数值模拟方法,基于欧拉-欧拉两相流模型,建立了空调用分液器内气液两相流动数学模型,并分析了不同干度、质量流速及放置方式对分液器内部制冷剂气液两相体积分数分布、流速及分配性能的影响。结果表明:当分液器竖直放置时,制冷... 详细信息

采用CFD数值模拟方法,基于欧拉-欧拉两相流模型,建立了空调用分液器内气液两相流动数学模型,并分析了不同干度、质量流速及放置方式对分液器内部制冷剂气液两相体积分数分布、流速及分配性能的影响。结果表明:当分液器竖直放置时,制冷剂干度和进口质量流量对分液器分配性能影响较小;制冷剂干度和分液器放置方式对分液器中制冷剂气液两相流动状态影响较大;分液器竖直放置时的分配性能优于倾斜放置的。

关键词：欧拉-欧拉模型数值模拟分液器干度质量流速

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