http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Seongmin Kim,Hanseul Kim,Sung Wook Doo,Hee-Jae Jeon,In Hye Kim,Hyun-seung Kim,Youngjin Kim The Korean Electrochemical Society 2023 Journal of electrochemical science and technology Vol.14 No.3
The global energy storage markets have gravitated to high-energy-density and low cost of lithium-ion batteries (LIBs) as the predominant system for energy storage such as electric vehicles (EVs). High-Ni layered oxides are considered promising next-generation cathode materials for LIBs owing to their significant advantages in terms of high energy density. However, the practical application of high-Ni cathodes remains challenging, because of their structural and surface instability. Although extensive studies have been conducted to mitigate these inherent instabilities, a two-step process involving the synthesis of the cathode and a dry/wet coating is essential. This study evaluates a one-step β-Li<sub>2</sub>SnO<sub>3</sub> layer coating on the surface of LiNi<sub>0.8</sub>Co<sub>0.2</sub>O<sub>2</sub> (NC82) via the thermal segregation of Sn owing to the solubility limit with respect to the synthesis temperature. The doping, segregation, and phase transition of Sn were systematically revealed by structural analyses. Moreover, surface-engineered 5 mol% Sn-coated LiNi<sub>0.8</sub>Co<sub>0.2</sub>O<sub>2</sub> (NC82_Sn5%) exhibited superior capacity retention compared to bare NC82 owing to the stable surface coating layer. Thus, the developed one-step coating method is suitable for improving the properties of high-Ni layered oxide cathode materials for application in LIBs.
Kim, Jun Young,Cho, Eunae,Kim, Jaehoon,Shin, Hyeonwoo,Roh, Jeongkyun,Thambidurai, Mariyappan,Kang, Chan-Mo,Song, Hyung-Jun,Kim, SeongMin,Kim, Hyeok,Lee, Changhee Optical Society of America 2015 Optics express Vol.23 No.19
<P>We demonstrate that nanocrystalline Al-doped zinc oxide (n-AZO) thin film used as an electron-extraction layer can significantly enhance the performance of inverted polymer solar cells based on the bulk heterojunction of poly[[9-(1-octylnonyl)-9H-carbazole-2,7-diyl]-2,5-thiophenediyl-2,1,3-benzothiadiazole-4,7-diyl-2,5-thiophenediyl] (PCDTBT) and [6,6]-phenyl C<sub>71</sub>-butyric acid methyl ester (PC<sub>70</sub>BM). A synergistic study with both simulation and experiment on n-AZO was carried out to offer a rational guidance for the efficiency improvement. As a result, An n-AZO film with an average grain size of 13 to 22 nm was prepared by a sol-gel spin-coating method, and a minimum resistivity of 2.1 ?? 10<sup>-3</sup> 곽·cm was obtained for an Al-doping concentration of 5.83 at.%. When an n-AZO film with a 5.83 at.% Al concentration was inserted between the ITO electrode and the active layer (PCDTBT:PC<sub>70</sub>BM), the power conversion efficiency increased from 3.7 to 5.6%.</P>
Caspase-8 controls the secretion of inflammatory lysyl-tRNA synthetase in exosomes from cancer cells
Kim, Sang Bum,Kim, Hye Rim,Park, Min Chul,Cho, Seongmin,Goughnour, Peter C.,Han, Daeyoung,Yoon, Ina,Kim, YounHa,Kang, Taehee,Song, Eunjoo,Kim, Pilhan,Choi, Hyosun,Mun, Ji Young,Song, Chihong,Lee, Sang Rockefeller University Press 2017 The Journal of cell biology Vol.216 No.7
<P>Aminoacyl-tRNA synthetases (ARSs), enzymes that normally control protein synthesis, can be secreted and have different activities in the extracellular space, but the mechanism of their secretion is not understood. This study describes the secretion route of the ARS lysyl-tRNA synthetase (KRS) and how this process is regulated by caspase activity, which has been implicated in the unconventional secretion of other proteins. We show that KRS is secreted from colorectal carcinoma cells within the lumen of exosomes that can trigger an inflammatory response. Caspase-8 cleaved the N-terminal of KRS, thus exposing a PDZ-binding motif located in the C terminus of KRS. Syntenin bound to the exposed PDZ-binding motif of KRS and facilitated the exosomic secretion of KRS dissociated from the multi-tRNA synthetase complex. KRS-containing exosomes released by cancer cells induced macrophage migration, and their secretion of TNF-α and cleaved KRS made a significant contribution to these activities, which suggests a novel mechanism by which caspase-8 may promote inflammation.</P>
Kim, Soohyun,Yuk, Seongmin,Kim, Hyun Gyu,Choi, Chanyong,Kim, Riyul,Lee, Jang Yong,Hong, Young Taik,Kim, Hee-Tak The Royal Society of Chemistry 2017 Journal of materials chemistry. A, Materials for e Vol.5 No.33
<▼1><P>A hydrocarbon/Nafion bilayer membrane is fabricated using a three-dimensionally interlocked interfacial layer for improved cycling durability of VRFBs.</P></▼1><▼2><P>Hydrocarbon (HC) membranes have not been successfully employed for vanadium redox flow batteries (VRFBs) due to their severe chemical degradation by highly oxidative VO2<SUP>+</SUP> ions in the positive electrolyte. Protective coating of chemically stable Nafion ionomers on HC membranes can retard the degradation, but how to achieve strong interfacial adhesion of the two layers without losing proton conductivity presents a challenge. Here, we report a sulfonated poly(arylene ether sulfone) (SPAES)/Nafion bilayer membrane (S/N membrane), the interface of which is mechanically fastened by a three-dimensionally interlocked interfacial layer (3-D IIL). The 3-D IIL, which features a ball and socket joint structure, strongly binds the two chemically dissimilar membranes and thus does not generate additional interfacial resistance for proton conduction. As a result, the VRFB with the S/N membrane achieves higher coulombic and energy efficiencies than that with Nafion 115. Moreover, it can operate more than 200 cycles in contrast to a sudden membrane failure after 110 cycles for the cell with a pristine SPAES membrane, demonstrating the efficacy of this approach.</P></▼2>