Article
Chemistry, Physical
Bo Jiang, Yue Qiu, Da Tian, Yu Zhang, Xueqin Song, Chenghao Zhao, Maoxu Wang, Xun Sun, Huihuang Huang, Chenyang Zhao, Hao Zhou, Aosai Chen, Lishuang Fan, Naiqing Zhang
Summary: Controlling exposed crystal facets through crystal facet engineering is effective in enhancing the catalytic activity of nanocrystalline catalysts. The synthesis of active SnO2 nano-octahedra enclosed by {332} crystal facets demonstrates powerful chemisorption and catalytic ability, improving the redox kinetics of sulfur species in lithium-sulfur chemistry. Crystal facet engineering is a promising strategy for optimizing catalyst performance and aiding in the rational design of advanced sulfur electrodes.
ADVANCED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Ying Wang, Zicong Tan, Zhu Zhang, Peili Zhu, Sze Wah Tam, Zhang Zhang, Xiaoli Jiang, Kaili Lin, Linyuan Tian, Zhifeng Huang, Shiqing Zhang, Yung-Kang Peng, Ken Kin Lam Yung
Summary: This study reports for the first time the role of facet-dependent CeO2-mediated redox homeostasis in regulating self-renewal and differentiation of NPCs. Different crystal facets of CeO2 nanoparticles exhibit different catalase-like (CAT) activities, modulating the redox homeostasis and fate of NPCs.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Chia-Jui Hsieh, Yi-Hong Liu, Chi-Yen Tsao, Jui-Tai Lin, Chong-Chi Chi, Chun-Wei Chang, Yueh-Chun Hsiao, Cheng-Yu Wu, Tung-Han Yang
Summary: This study utilizes quantitative analysis and observation of the synthesis process of Pd nanocrystals to reveal the influence of bromide on the reduction kinetics and etching process, thus determining the structure and facets of the nanocrystals. The results show that different rates of Pd(II) reduction regulated by Br- ions lead to the formation of Pd seeds with different structures, which can be selectively removed during the growth stage, leaving behind Pd seeds with desired structures for the evolution into well-defined facetted Pd nanocrystals. The mechanistic insights obtained from this study can be extended to the synthesis of Pd@Pd-Pt core-shell nanocubes with high-index facets, which have great potential as electrocatalysts and photocatalysts for hydrogen generation.
ADVANCED MATERIALS INTERFACES
(2022)
Review
Chemistry, Inorganic & Nuclear
Yuanzheng Zhu, Chunguang Chen, Ping Cheng, Jie Ma, Weibang Yang, Weixin Yang, Yaru Peng, Yiguo Huang, Shuping Zhang, Gimyeong Seong
Summary: CeO2-based nanomaterials have attracted great attention for their various applications, and this paper focuses on facet-controlled CeO2-based nanomaterials prepared by the hydrothermal method. By adjusting reaction parameters, CeO2-based nanomaterials with controllable size and exposed facets can be obtained. Furthermore, doping and loading metals can enhance the oxygen storage capacity and catalytic activity of CeO2. Various studies on catalytic applications have demonstrated the high potential of facet-controlled CeO2 nanomaterials.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Zhuobin Huo, Peng Zhao, Pengfei Miu, Lingling Ren, Bangjie Tan, Nengjie Feng, Hui Wan, Guofeng Guan
Summary: Ag-Ce modified 3DOM LaMnO3 catalysts synthesized by redox etching precipitation showed excellent catalytic performance for NOx-assisted soot oxidation, with good activity and water resistance. Ag and CeO2 played important roles in enhancing catalyst performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Dandan Cui, Yujiao Shi, Da Xing, Sihua Yang
Summary: An ultrahigh-sensitive and tumor-specific photoacoustography technique using photosensitive silver bromide nanocrystals has been developed for rapid and accurate identification of tumor tissues in the near-infrared region. Experimental results demonstrate that this tumor-specific photoacoustography technology holds great promise for high-precision cancer diagnosis and treatment monitoring.
Article
Public, Environmental & Occupational Health
Rasaq Adisa, Teju T. Ayandokun, Olusoji M. Ige
Summary: Prospective DS-TB patients have relatively high knowledge about TB, especially regarding modes of transmission and preventive measures, but a significant number lack understanding of ensuring optimal TB medication adherence to prevent TB transmission. Inaccessibility to healthcare facility largely accounts for treatment non-adherence. Treatment outcomes within the 5-year period show that nearly half of patients were cured, while almost one-tenth died. The overall treatment success rate is about 12% below the WHO-defined target, highlighting the need for stakeholders to step up efforts in consistent TB enlightenment and improving access to TB care for better treatment outcomes.
Article
Medicine, General & Internal
Berhane Megerssa Ereso, Mette Sagbakken, Christoph Gradmann, Solomon Abebe Yimer
Summary: Patients who chose community-based DOTS had a higher cure rate and lower risk of death and treatment failure compared to those who chose facility-based DOTS. Additionally, community-based DOTS resulted in a lower likelihood of positive sputum smear results compared to facility-based DOTS at the end of treatment.
Review
Chemistry, Multidisciplinary
Qiao Ni, Byunghoon Kim, Chuan Wu, Kisuk Kang
Summary: This article comprehensively reviews the recent research progress on non-electrode components in AZBs, including the introduction of new types of electrolytes, attempts to tailor SEI, and design efforts for multi-functional current collectors, binders, and separators. The challenges and future research directions in this field are also discussed.
ADVANCED MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Kyungho Yoon, Sunyoung Lee, Kyungbae Oh, Kisuk Kang
Summary: The significant improvement in the ionic conductivity of inorganic solid electrolytes has made commercialization of solid-state batteries possible, allowing for the utilization of lithium metal anodes without safety risks. However, challenges such as poor cycle stability and low energy efficiency in solid-state lithium metal batteries persist, requiring efforts to overcome interface stability and dendrite growth of lithium metal.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Do-Hoon Kim, Jun-Hyuk Song, Chul-Ho Jung, Donggun Eum, Byunghoon Kim, Seong-Hyeon Hong, Kisuk Kang
Summary: This study investigates the feasibility of doping strategies to improve the cycle stability of high-nickel NCM cathodes in lithium-ion batteries. A three-step screening process is used to identify effective dopants based on density functional theory calculations. The study successfully synthesizes a silicon-doped cathode with superior electrochemical performance compared to the undoped counterpart. Additionally, a comprehensive map of dopants for potential applicability is presented, providing guidance for an effective doping strategy for high-nickel NCM cathodes.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Junyoung Heo, Dohun Kang, Sungin Kim, Hoje Chun, Byungchan Han, Byung Hyo Kim, Jungwon Park
Summary: In this study, a method of symmetry analysis using 3D atomic coordinates is introduced, which provides a direct and quantitative analysis of the symmetrical properties and local structural characteristics of nanoparticles. The experimental results reveal the crystal structure features of platinum nanoparticles and demonstrate localized structural deformations different from their bulk counterpart.
Article
Green & Sustainable Science & Technology
Byunghoon Kim, Jun-Hyuk Song, Donggun Eum, Seungju Yu, Kyungbae Oh, Myeong Hwan Lee, Ho-Young Jang, Kisuk Kang
Summary: This study provides a theoretical framework to understand the trilateral correlation of oxygen redox, structural disorder, and bond covalency. Structural disorder associated with anionic redox stabilizes the oxygen redox by promoting the formation of oxygen covalent bonds, enhancing electrochemical reversibility.
NATURE SUSTAINABILITY
(2022)
Article
Nanoscience & Nanotechnology
Cu Dang Van, Jae Ryeol Jeong, Kyungho Yoon, Kisuk Kang, Min Hyung Lee
Summary: In this study, a core-shell structure of molybdenum-based nanoparticle/carbon nanotube (CNT)/carbon is successfully synthesized and applied as anode material for lithium-ion batteries (LIBs). The research shows that this structure can improve the capacity and stability of LIBs, with ultrafine nanoparticles enhancing pseudocapacitance and the conductivity of CNT contributing to stability at high current density.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yuna Bae, Min Young Ha, Ki-Taek Bang, Sanghee Yang, Sung Yun Kang, Joodeok Kim, Jongbaek Sung, Sungsu Kang, Dohun Kang, Won Bo Lee, Tae-Lim Choi, Jungwon Park
Summary: This paper utilizes liquid-phase transmission electron microscopy to track the real-time dynamics of single-chain polymers, revealing the conformational characteristics of these polymers and their dependence on intrachain interactions and environmental factors.
ADVANCED MATERIALS
(2022)
Article
Multidisciplinary Sciences
Sunyoung Lee, Kyeong-Su Lee, Sewon Kim, Kyungho Yoon, Sangwook Han, Myeong Hwan Lee, Youngmin Ko, Joo Hyeon Noh, Wonju Kim, Kisuk Kang
Summary: A rational layer-by-layer strategy using a lithiophilic and electron-blocking multilayer is demonstrated to enhance the performance and stability of all-solid-state batteries, by effectively blocking electron leakage and maintaining low electronic conductivity. This results in homogeneous lithium plating/stripping and achieves high critical current densities. A full cell paired with a commercial-level cathode exhibits exceptional durability and coulombic efficiency, setting a new performance record for all-solid-state lithium metal batteries.
Article
Chemistry, Physical
Jooha Park, Sung Joo Kim, Kyungmi Lim, Jiung Cho, Kisuk Kang
Summary: This study demonstrates that reconfiguring sodium intercalation via partial solvent cointercalation improves the reversibility and cycle stability of sodium-ion battery electrodes, enhancing the sodium intercalation capability.
ACS ENERGY LETTERS
(2022)
Review
Nanoscience & Nanotechnology
Jihyeon Kim, Youngsu Kim, Jaekyun Yoo, Giyun Kwon, Youngmin Ko, Kisuk Kang
Summary: Transition-metal-free organic rechargeable batteries are promising alternatives to lithium-ion batteries, with potential cost-effectiveness and eco-friendliness. This review evaluates the current status of organic rechargeable batteries and discusses their potential in various post-lithium-ion-battery platforms.
NATURE REVIEWS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Dohun Kang, Sungin Kim, Junyoung Heo, Dongjun Kim, Hyeonhu Bae, Sungsu Kang, Sangdeok Shim, Hoonkyung Lee, Jungwon Park
Summary: The study focuses on the complex adsorption behavior of polyvinylpyrrolidone (PVP) ligands on synthesized Pt nanoparticles. Machine-learning-accelerated ab initio calculation is applied to analyze the experimentally resolved 3D atomic structures. The results reveal the weak positive relationship between the binding energy of large-sized ligand and the generalized coordination number, as well as the preference of PVP ligands to adsorb where long-range van der Waals interaction is maximized.
Article
Multidisciplinary Sciences
Junyoung Heo, Dongjun Kim, Hyesung Choi, Sungin Kim, Hoje Chun, Cyril F. F. Reboul, Cong T. S. Van, Dominika Elmlund, Soonmi Choi, Kihyun Kim, Younggil Park, Hans Elmlund, Byungchan Han, Jungwon Park
Summary: This article introduces a method for determining the 3D atomic structures of multi-element nanoparticle systems. The method utilizes low-pass filtration and customized initial 3D model generation for different types of multi-element systems, enabling the reconstruction of high-resolution 3D Coulomb density maps and classification of heteroatom types.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Jaekyun Yoo, Byunghoon Kim, Byungju Lee, Jun-hyuk Song, Kisuk Kang
Summary: Selecting chemically compatible functional materials is crucial for the assembly and long-term stability of multi-component systems. In the design of organic-based batteries, the compatibility between organic compounds for the electrode and electrolyte is important. A new artificial neural network platform called ImRRNet was developed to predict the chemical reactivities of any combination of two organic compounds. The accuracy of ImRRNet was remarkably higher than previous models, making it suitable for practical use in the design of multi-component organic-based rechargeable batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Wonju Kim, Joohyeon Noh, Sunyoung Lee, Kyungho Yoon, Sangwook Han, Seungju Yu, Kun-Hee Ko, Kisuk Kang
Summary: Halide solid electrolytes are a promising option for cathode-compatible catholytes in solid-state batteries (SSBs) due to their superior oxidation stability and interfacial stability. However, their long-term aging at the cathode interface has not been explored before, which is crucial for practical deployment.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Youngmin Ko, Kyoungoh Kim, Jaekyun Yoo, Giyun Kwon, Hyeokjun Park, Jihyeon Kim, Byungju Lee, Jun-Hyuk Song, Jinsoo Kim, Kisuk Kang
Summary: This study elucidates the kinetic mechanism of redox-mediated oxygen reduction reactions in lithium-oxygen batteries using benzoquinone derivatives. It reveals that the oxygen reduction by the redox mediator occurs via inner-sphere electron transfer, and its kinetics is significantly affected by the steric hindrance effects. The electrochemical performance is governed by both the kinetics of redox mediators and their steric hindrance.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
