Search

Your search keyword '"Hwang, Yunil"' showing total 18 results
Start Over Author "Hwang, Yunil"
18 results on '"Hwang, Yunil"'

3. Revealing evolving affinity between Coulombic reversibility and hysteretic Li-Si phase transformations

Author

Ogata, Ken, Jeon, Seongho, Ko, Dong-Su, Jung, Insun, Kim, Jinhae, Ito, Kimihiko, Kubo, Yoshimi, Takei, Koichi, Saito, Shunsuke, Cho, Yonghee, Park, Hosang, Jang, Jihyun, Kim, Heegoo, Kim, Jung-Hwa, Kim, Yongsu, Koh, Meiten, Uosaki, Kohei, Doo, Seok-Gwang, Hwang, Yunil, and Han, Sung-soo

Subjects
Condensed Matter - Materials Science
Abstract

Nano-structured silicon anodes are attractive alternatives to graphite in Li-ion batteries. Despite recent remarkable progresses in numerous Si-C composites, the commercialisation with significance is still limited. One of the most critical issues remained to understand is fundamentals on Li-Si Coulombic efficiency, namely, CE. Particularly, it is key to quantitatively and qualitatively resolve CE alterations and evolutions by the various Li-Si structural changes over longer cycling. However, such work is surprisingly scarce. Here, we provide new findings that iterating the hysteretic amorphous-crystalline Li-Si phase transformations accumulatively governs CE evolutions, the manner of which is numerically distinguished from incremental amorphous Li-Si volume changes. The iterations, usually featured as capacity degradation factors, can form the most efficient CE profiles over hundreds of cycles, i.e. minimising accumulative irreversible Li consumption, among the given Li-Si reaction sequences. Combined with atomistic probing methodologies, we show that the iteration drastically alters electrochemical and structural characteristics, which is synchronised with the CE behaviours., Comment: Main body (33 pages), main figures (7 figures), supplementary information (32 pages), supplementary table (5 tables), supplementary figures (26 figures)

Published
2017

4. High-Performance Thick Cathode Based on Polyhydroxyalkanoate Binder for Li Metal Batteries

Author

Kang, Dong Hyuk, primary, Park, Minhyuck, additional, Lee, Jeonghun, additional, Kim, Chan Yeol, additional, Park, Jimin, additional, Lee, Youn-Ki, additional, Hyun, Jong Chan, additional, Ha, Son, additional, Kwak, Jin Hwan, additional, Yoon, Juhee, additional, Kim, Hyemin, additional, Kim, Hyun Soo, additional, Kim, Do Hyun, additional, Kim, Sangmin, additional, Park, Ji Yong, additional, Jang, Robin, additional, Yang, Seung Jae, additional, Lim, Hee-Dae, additional, Cho, Se Youn, additional, Jin, Hyoung-Joon, additional, Lee, Seungjin, additional, Hwang, Yunil, additional, and Yun, Young Soo, additional

Published
2023
Full Text
View/download PDF

9. The effects of standardized ileal digestible His to Lys ratio on growth performance, intestinal health, and mobilization of histidine-containing proteins in pigs at 7 to 11 kg body weight.

Author

Cheng, Yi-Chi, Lee, Hye-lim, Hwang, Yunil, and Kim, Sung Woo

Subjects
BODY weight, SWINE, PROTEINS in animal nutrition, PROTEINS, MUSCLE proteins, BLOCK designs
Abstract

The objectives were to evaluate the effects of standardized ileal digestible (SID) His:Lys ratio above the current NRC requirement on growth performance, intestinal health, and mobilization of His-containing proteins, including hemoglobin, carnosine, and trypsinogen, in nursery pigs from 7 to 11 kg body weight (BW). Forty pigs (26 d of age; initial BW of 7.1 ± 0.5 kg) were allotted to 5 dietary treatments based on a randomized complete block design with sex and initial BW as blocks. Dietary treatments were supplemented with varying SID His to Lys ratios of 26%, 32%, 38%, 43%, and 49% and fed to pigs for 14 d (SID Lys = 1.22%). Feed intake and BW were recorded at d 0, 7, and 14 to measure growth performance. Blood samples were collected on d 12. Pigs were euthanized on d 14 to collect pancreas, longissimus dorsi muscles, mid-jejunum, and jejunal mucosa. Data were analyzed using the Proc Mixed of SAS. Growth performance was not affected, whereas varying SID His to Lys ratio affected hemoglobin (P  < 0.05, max: 12 g/dL at 36%), immunoglobulin A (IgA, P  < 0.05, min: 1.25 μg/mg at 35%) in jejunal mucosa, villus height (P  = 0.065, max: 536 μm at 40%) in jejunum, trypsinogen (P  = 0.083, max: 242 pg/mg at 41%) in pancreas, and carnosine (P  = 0.051, max: 4.7 ng/mg at 38%) in muscles. Varying SID His to Lys ratios linearly increased (P  < 0.05, from 1.95 to 2.80 nmol/mg) protein carbonyl in muscles and decreased (P  < 0.05, from 29.1% to 26.9%) enterocyte proliferation. In conclusion, SID His to Lys ratio between 35% and 41% in diets fed to nursery pigs at 7 to 11 kg enhanced intestinal health and maximized concentrations of His-containing proteins, indicating that His-containing proteins are effective response criteria when determining His requirement. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

12. Dendrite-Free Lithium Deposition for Lithium Metal Anodes with Interconnected Microsphere Protection

Author

Lee, Yong-Gun, primary, Ryu, Saebom, additional, Sugimoto, Toshinori, additional, Yu, Taehwan, additional, Chang, Won-seok, additional, Yang, Yooseong, additional, Jung, Changhoon, additional, Woo, Jaesung, additional, Kang, Sung Gyu, additional, Han, Heung Nam, additional, Doo, Seok-Gwang, additional, Hwang, Yunil, additional, Chang, Hyuk, additional, Lee, Jae-Myung, additional, and Sun, Jeong-Yun, additional

Published
2017
Full Text
View/download PDF

13. A Self-Healing Aqueous Lithium-Ion Battery

Author

Zhao, Yang, primary, Zhang, Ye, additional, Sun, Hao, additional, Dong, Xiaoli, additional, Cao, Jingyu, additional, Wang, Lie, additional, Xu, Yifan, additional, Ren, Jing, additional, Hwang, Yunil, additional, Son, In Hyuk, additional, Huang, Xianliang, additional, Wang, Yonggang, additional, and Peng, Huisheng, additional

Published
2016
Full Text
View/download PDF

14. Energy-Efficient Signal Processing Using FPGAs

Author

K Prasanna Viktor, Hwang Yunil, Scrofano Ronald, and Jang Ju-wook

Subjects
Signal processing, Computer architecture, Computer science, Field-programmable gate array, Efficient energy use
Published
2005

Catalog

Books, media, physical & digital resources
See catalog results