Article
Multidisciplinary Sciences
Damien Degoulange, Raj Pandya, Michael Deschamps, Dhyllan A. Skiba, Betar M. Gallant, Sylvain Gigan, Hilton B. de Aguiar, Alexis Grimaud
Summary: High-resolution Raman imaging is used to investigate the interface of salt-salt aqueous biphasic systems (ABSs) at a molecular level, revealing a gradual change of environment instead of a sharp molecular interface. This knowledge is of great importance in understanding aqueous interfaces and has significant implications in various biological and technological settings, including novel battery technologies.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Physical
Jinsol Im, Jung-Dae Kwon, Dong-Ho Kim, Sukeun Yoon, Kuk Young Cho
Summary: This study developed a new sandwich Si anode without the need for prelithiation, providing high conductivity and specific capacity. It showed excellent performance in terms of initial Coulombic efficiency and capacity retention, demonstrating great potential for practical applications.
Article
Chemistry, Physical
Chisang Park, Sorout Shalini, Alauddin Ahmed, Thomas P. Vaid, Kwangnam Kim, Adam J. Matzger, Donald J. Siegel
Summary: The inclusion of salts in metal-organic frameworks (MOFs) has been shown to increase ionic conductivities, suggesting their potential use as solid electrolytes. This study explores the mechanism and maximum loadings of including ionic liquids (ILs) in MOFs. The results suggest that electrostatic interactions contribute to the upper limit of loading and that conductivity is maximized for loadings that do not completely fill the MOF pores. The surface area and pore volume of empty MOFs are good predictors of the maximum salt loading.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Ceramics
Chenxin Jin, Jianglei Dan, Yue Zou, Guojun Xu, Zhihao Yue, Xiaomin Li, Fugen Sun, Lang Zhou, Li Wang
Summary: By doping SiOx with ammonium sulfate and carbon-coating it with glucose, carbon-coated nitrogen-doped SiOx (N doped SiOx@C) was successfully prepared to enhance electronic and ionic conductivity. This synergistic effect greatly improved the electrochemical performance, achieving a high specific capacity retention rate of 91.4% after 100 cycles at a high rate. The method is characterized by its flexibility, simplicity, and efficiency.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Kristian Les, Jens Schoenewerk, Jens Glenneberg, Carmen-Simona Jordan
Summary: The performance of solid polymer electrolytes is characterized by lower ionic conductivity than conventional liquid electrolytes, but it provides advantages in terms of operational safety. A quasi-solid polymer electrolyte (QSPE) based on a new plasticizer and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) was successfully prepared via UV-induced copolymerization. The QSPE exhibits highly uniform morphology, thermal stability, ionic conductivity, high electrochemical stability, and a low glass transition temperature. It offers potential application in high-voltage lithium-ion batteries.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Energy & Fuels
Asif Raza, So Yeun Kim, Jeong-Hee Choi, Jeom-Soo Kim, Min-Sik Park, Sang-Min Lee
Summary: Silicon suboxides (SiOx) are potential anode materials for high-energy lithium-ion batteries (LIBs) due to their high specific capacity and stable cycling performance. The crystallinity of Si embedded in the SiO2 matrix significantly influences the electrochemical performance of SiOx. The presence of heat absorbents (KCl and NaCl) during the magnesiothermic reduction of SiO affects the crystallinity of SiOx particles and hence the electrochemical behavior of SiOx during cycling, with KCl leading to superior performance compared to NaCl.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Haiqing Xiao, Chen Fang, Tianyue Zheng, Hua Bai, Gao Liu
Summary: Silicon suboxide (SiOx) is a promising anode material for lithium-ion batteries, but it suffers from severe capacity fading during cycling. This study investigates the fading mechanisms of SiOx anode materials, revealing the role of surface instability.
Article
Chemistry, Multidisciplinary
Jacobs H. Jordan, Henry S. Ashbaugh, Joel T. Mague, Bruce C. Gibb
Summary: There are still many unresolved questions regarding the supramolecular properties of ions in water, and the mathematical models used by supramolecular chemists do not adequately account for screening effects. The study shows that both screening and competitive binding have significant impacts on affinity in buffered solutions, especially when the ionic strength changes significantly. The competitive mathematical model proposed in the study suggests that competitive binding to the host is a major factor for binding attenuation in buffer systems, outweighing the effect of screening.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Applied
Renlong Li, Binghan Cui, Qingjie Zhou, Xue Mu, Yunzhi Gao, Geping Yin, Chuankai Fu, Pengjian Zuo
Summary: An organic-inorganic composite interfacial layer rich in benzene ring groups, polyisocyanates, and LiF was successfully obtained on SiOx anode by introducing specific additives, which effectively improved its cycling performance.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Jin-Ah Kim, Se-Hoon Choi, Hong-Gyu Park
Summary: We investigate the effect of varying solution-derived zinc oxide (ZnO) concentrations on liquid crystal (LC) alignment after treatment with atmospheric plasma. Uniform alignment of the LC alignment layer is crucial for high-performance displays. The combination of atmospheric plasma and inorganic alignment layer introduces a new efficient manufacturing process with potential applications in various fields. By analyzing the surface modification, LC alignment, and electro-optical characteristics, we find that increasing the ZnO concentration enhances the pretilt angle and dipole moment between LC molecules, leading to improved driving voltage and rapid response time (<20 ms) in the samples. Optimal process conditions for manufacturing ZnO alignment films are determined using the rubbing-atmospheric pressure plasma coprocessing technique.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Jose C. Diaz, Jovan Kamcev
Summary: Accurate measurements of membrane ionic conductivity are essential for understanding ion transport, but there is no standardized technique for such measurements. Discrepancies in reported ionic conductivity values for common commercial membranes are common. This study presents a non-invasive method based on electrochemical impedance spectroscopy to address external resistances in thin membranes equilibrated with dilute salt solutions.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Ni Yan, Rahul Sujanani, Jovan Kamcev, Eui-Soung Jang, Kentaro Kobayashi, Donald R. Paul, Benny D. Freeman
Summary: Salt permeability and ionic conductivity are critical properties for membranes in water purification and energy applications. In this study, a series of uncharged and charged membranes were synthesized and the effects of polymer structure on ion transport properties were investigated. The results showed that water content has a strong influence on ion diffusion in both uncharged and charged polymers.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Hang Zhan, Yu Wen Chen, Qiang Qiang Shi, Yu Zhang, Run Wei Mo, Jian Nong Wang
Summary: The study demonstrates a simple method to prepare highly aligned carbon nanotube films with excellent thermal conductivity, electrical conductivity, mechanical strength, and Young's modulus, which remain stable even after 500 cycles of bending test.
Article
Multidisciplinary Sciences
Azeem Shahzad, Fakhira Liaqat, Zaffer Ellahi, Muhammad Sohail, Muhammad Ayub, Mohamed R. Ali
Summary: This study investigates the flow and heat transfer of Cu-nanofluid in a thin film over a stretching sheet, considering different shape factors and boundary conditions. The results show that the platelet-shaped nanoparticles have the highest heat transfer rate among the different particle shapes.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Omar Alshangiti, Giulia Galatolo, Gregory J. Rees, Hua Guo, James A. Quirk, James A. Dawson, Mauro Pasta
Summary: The use of solvent-in-salt electrolytes for fluoride ion batteries (FIBs) is explored to overcome the limitations of insufficiently stable and conductive electrolytes at room temperature. Aqueous cesium fluoride is found to exhibit high solubility, enabling an enhanced stability window and improved cycling stability for FIBs. The solvation structure and transport properties of the electrolyte are also investigated using spectroscopic and computational methods.
ACS ENERGY LETTERS
(2023)
