Article
Thermodynamics
Mingyue Zhao, Baojiang Sun, Changhong Yu, Cheng Yue, Yuhang Zhang, Litao Chen
Summary: This research presents a rapid and accurate method for predicting gas hydrate equilibrium conditions based on water activity measurement, which is tested and proven to be reliable and effective through experiments.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Chemistry, Physical
Christoph J. Sahle, Emmanuelle de Clermont Gallerande, Johannes Niskanen, Alessandro Longo, Mirko Elbers, Martin A. Schroer, Christian Sternemann, Sandro Jahn
Summary: This study investigates the hydration of ions in aqueous solutions using a combined experimental and theoretical approach. By analyzing the oxygen K-edge X-ray excitation spectra, the researchers were able to identify and characterize the hydration shells of Na+ and Cl- ions. The strongest spectral changes were found to originate from the first hydration shells of both ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Energy & Fuels
Nagakeerthana Apparla, Karnan Manickavasakam, Chandra Shekhar Sharma
Summary: Supercapacitors have advantages of ultra-long life cycles and high-power density, but face the challenge of low energy density. This study addresses this challenge through two approaches: one using carbon from candle soot activation, and the other increasing energy density with non-aqueous electrolytes and a redox additive.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Kouhei Komori, Takamichi Terao
Summary: Recently, there has been a lot of interest in the properties of screening phenomena in concentrated electrolytes. Molecular dynamics simulations were conducted on an aqueous NaCl solution to investigate the cluster-size distribution of cations and anions. The cluster-size distribution showed power-law decay behavior at sufficiently high concentrations. Additionally, the fraction of isolated ions without pairing or clustering was studied. The study clarifies the statistical physics of cations and anions in concentrated electrolytes.
CHEMICAL PHYSICS LETTERS
(2023)
Review
Nanoscience & Nanotechnology
Giulio Calcagno, Brian Evanko, Galen D. Stucky, Elisabet Ahlberg, Seung Joon Yoo, Anders E. C. Palmqvist
Summary: Compared to traditional electric double-layer capacitors, redox-enhanced electrochemical capacitors show higher energy density and more stable power output. This study aims to understand the electrochemical mechanisms of the aqueous pentyl viologen/bromide dual redox system at the interface of ordered mesoporous carbon and improve device performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Thermodynamics
Arnault Lassin, Laurent Andre
Summary: This article presents an improved model for accurately describing the CaCl2-H2O chemical system, covering a wide range of temperatures and concentrations. The model considers the aqueous speciation of the CaCl2 electrolyte and is applicable to ternary systems containing major cations.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2023)
Article
Electrochemistry
Huan Zhang, Suhee Choi, D. Ethan Hamilton, Michael F. Simpson
Summary: The study analyzed the feasibility of using electrochemical methods to measure the concentration of PuCl3 in MSR fuel in real time, using NaCl-CaCl2-UCl3 and NaCl-CaCl2-UCl3-CeCl3 mixtures and observing visible WE deposition and Na deposition challenges. This indicates challenges in applying electrochemical methods for actinide analysis in MSR fuel containing NaCl.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Long Su, Fei Lu, Yanrui Li, Xia Li, Liangdan Chen, Yanan Gao, Liqiang Zheng, Xinpei Gao
Summary: Despite the poor reversibility and electrochemical stability of typical aqueous Zn-ion rechargeable batteries, hydrated eutectic electrolytes (HEEs) have been gaining attention for their high designability and superior performances. This study reveals the distinct evolution path of Zn-ion species from aqueous to HEEs enriched with H-bonds, which influences the microstructure and enhances cation diffusion mechanisms and interfacial reaction kinetics. Overall, this highlights the importance of ion species microstructural evolution in the rational design of superior aqueous electrolytes.
Article
Energy & Fuels
Yuzhe Liu, Hao Wang, Chengcai Li, Shaohui Wang, Lin Li, Chengwen Song, Tonghua Wang
Summary: This study utilized waste PI film to fabricate flaky porous carbon materials with tailored pore structure and functional groups through KOH activation, achieving excellent electrochemical performance. The materials showed high specific capacitance, good capacitance retention rate, and low impedance, making them promising electrode materials for supercapacitors.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Fanglin Wu, Matthias Kuenzel, Thomas Diemant, Angelo Mullaliu, Shan Fang, Jae-Kwang Kim, Hee Woong Kim, Guk-Tae Kim, Stefano Passerini
Summary: This article introduces a method of using water-soluble materials in lithium battery manufacturing to avoid environmental impact. By utilizing water-soluble binders and phosphate coatings, high-performance and cycling stability of the electrodes are achieved in both conventional organic electrolyte and ionic liquid electrolyte.
Article
Chemistry, Physical
Danting Li, Tian Lv, Zilin Chen, Yunlong Yang, Yanan Liu, Jun Wan, Yunlong Qi, Shaokui Cao, Tao Chen
Summary: This study demonstrates a highly compressible zinc ion battery with a cathode of polyaniline/carbon foam, an anode of Zn/carbon foam, and a gel electrolyte containing polyvinyl alcohol and Zn(CF3SO3)2. The 3D interconnection structure of the self-supporting carbon foam material provides a compressible platform for active materials and facilitates ion transport. The compressible zinc ion battery exhibits high specific capacity and excellent cyclic stability, maintaining its original electrochemical performance even under high compressive strain and repeated compression/release cycles, showcasing exceptional compressible capability.
Article
Energy & Fuels
Kashif Mushtaq, Sofia Delgado, Adelio Mendes
Summary: Nonaqueous electrolytes allow redox flow batteries to achieve higher energy density. However, carbon felt electrodes available in the market typically exhibit high overpotentials for electrochemical reactions in a nonaqueous medium. Therefore, it is important to develop stable high-performance electrodes that have low activation overpotentials, low ohmic losses, and high porosity for uniform flow-through distribution of the electrolyte. This study investigates the effect of using carbon-based nanoparticles attached to the fibers of the supporting carbon-felt electrodes. Different types of nanoparticles, including reduced graphene oxide, graphene, multi-walled carbon nanotubes (CNT), carbon black Vulcan XC72, and Ketjen carbon nanoparticles bound to the support carbon felt electrode using a Nafion ionomer, were evaluated. Post-mortem analysis showed that the nanoparticles remained attached to the fibers even after extensive charge-discharge cycling. Among the tested electrodes, the carbon felt with CNT displayed the best performance in charge/discharge electrochemical reactions, achieving a 23% higher energy efficiency compared to commonly used electrodes. The addition of noble metal-based nanoparticles Pt-rGO only slightly improved the performance of rGO. Good binding of the carbon nanoparticles was achieved by adding the ionomer at a ratio of 15 wt%.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Bhaskar Kakoty, Rishikesh Vengarathody, Srimayee Mukherji, Vinita Ahuja, Anjana Joseph, Chandrabhas Narayana, Sundaram Balasubramanian, Premkumar Senguttuvan
Summary: This study focuses on the improvement of aqueous rechargeable zinc-ion batteries by introducing highly polar propylene carbonate (PC), which suppresses water-derived parasitic reactions and enhances battery performance. The addition of a small amount of PC in the zinc ion electrolyte results in a stable zinc plating/stripping process and inhibits the dissolution of the cathode, leading to exceptional capacity and coulombic efficiency.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
T. V. Gordeychuk, M. V. Kazachek
Summary: The structure of sonoluminescence spectra in argon-saturated aqueous solutions of various concentrations of CaCl2 and NaCl is examined. Using ultrasound at a frequency of 20 kHz and output power of 18 W, the spectrum of CaCl2 solution significantly changes with increasing concentration. The intensity of the continuum reaches a maximum near saturation concentration. Atomic, ionic, and molecular metal lines are observed at medium concentrations, but disappear at high concentrations. Similar behavior is observed for NaCl solutions. The differences in spectra are attributed to changes in vapor-gas content of the bubbles and their population, transitioning from large and non-inertial to small and pulsating inertially.
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Chemistry, Inorganic & Nuclear
Bo Li, Zachary R. Jones, Cecilia Eiroa-Lledo, Karah E. Knope, Veronika Mocko, Benjamin W. Stein, Jennifer N. Wacker, Stosh A. Kozimor, Enrique R. Batista, Ping Yang
Summary: In order to understand the behavior of lanthanide/actinide ions in solvent salts, molecular dynamics simulations and EXAFS measurements were performed. It was found that the increase in solvent salt polarity led to an increase in the coordination number of ions. This coordination change was validated by the EXAFS measurements. The rigidity of the coordination shell was found to be related to the diffusivity of the ions.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Kevin Leung, Louise J. Criscenti, Andrew W. Knight, Anastasia G. Ilgen, Tuan A. Ho, Jeffery A. Greathouse
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2018)
Article
Chemistry, Physical
Tuan A. Ho, Louise J. Criscenti, Jeffery A. Greathouse
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2019)
Article
Nanoscience & Nanotechnology
Tuan A. Ho, Yifeng Wang
Summary: The study reveals that changes in gas pressure can lead to complex alterations in the wettability of solid surfaces involved in shale gas production and geological carbon sequestration, depending on surface chemistry, structure, and molecular interactions. Different solid surfaces exhibit varied responses to changes in CO2 gas pressure, playing a significant role in the design and optimization of related subsurface engineering processes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Tuan A. Ho, Eric N. Coker, Carlos F. Jove-Colon, Yifeng Wang
Summary: Swelling clay hydration/dehydration processes are significant in environmental and industrial applications. Experimental studies lack the ability to capture rapid water transport and structural changes in interlayers. Using molecular simulations and thermogravimetric analyses, researchers have observed a two-stage dehydration process in swelling clay, which is closely associated with interlayer collapse and changes in the coordination number of cations.
Article
Chemistry, Physical
Tuan A. Ho, Kevin M. Rosso, Louise J. Criscenti
Summary: Oriented attachment is an important crystal growth pathway that has been used to develop hierarchically structured crystalline materials. Classical molecular simulations were employed to calculate the potential of mean force for different motions between gibbsite nanoplatelets. The results showed that the highest energy barrier is associated with jump to contact, while mutual rotation is more probable than sliding motion, and jump to contact is the least probable.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Tuan V. Vu, Tuan A. Ho, Louise J. Criscenti
Summary: This study investigates the effect of atomistic misalignment and the roles of solvent/particle and particle/particle interactions on the structure-energy relationship during an OA process. Molecular dynamics simulations are performed to calculate the potential of mean force (PMF) profile for gibbsite particle translation on a gibbsite slab with different water layers. The results provide insights into the roles of particle/slab misalignment and hydrogen bond network in the OA of mineral particles in aqueous solution.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Tuan A. Ho, Yifeng Wang, Susan B. Rempe, Nabankur Dasgupta, Cliff T. Johnston, Guangping Xu, Timothy S. Zwier, Melissa Mills
Summary: Using metadynamics molecular dynamics simulations, we investigated the energy landscape associated with CO2 intercalation into clay interlayers. Our free energy calculations revealed that CO2 preferentially partitions into nanoconfined water in clay interlayers, resulting in an increased CO2/H2O ratio compared to the bulk water. The distribution of structural charges significantly influences the amount of CO2 intercalated in the interlayers. These findings provide a mechanistic understanding of CO2 intercalation in clays for CO2 separation, capture, and storage.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Nabankur Dasgupta, Tuan A. Ho, Susan B. Rempe, Yifeng Wang
Summary: Understanding the formation of H2CO3 in water from CO2 is crucial in environmental and industrial processes. This study reveals significant differences in the free energy and reaction characteristics between bulk and nanoconfined water. Nanoconfinement not only lowers the energy barrier, but also alters the reaction from endothermic to exothermic. The stronger solvation and improved proton transfer under nanoconfinement enhance the reaction's thermodynamics and kinetics.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Lingyao Meng, Tuan V. Vu, Louise J. Criscenti, Tuan A. Ho, Yang Qin, Hongyou Fan
Summary: Using compressive mechanical forces to induce crystallographic phase transitions and mesostructural changes in nanoparticles has provided unique insights into new phase behaviors and novel nanostructures. Recent research has improved our understanding of the pressure-structure-property relationships and led to better design guidelines for nanomaterial synthesis. Molecular modeling has further contributed to mechanistic explanations and predictive guidelines for future experiments.
Article
Chemistry, Physical
Tuan A. Ho, Carlos F. Jove-Colon, Yifeng Wang
Summary: The intercalation of hydrogen into clay interlayers is thermodynamically unfavorable, unlike CO2 intercalation. The solubility of hydrogen in hydrated clay interlayers is similar to that in bulk water, indicating limited loss and leakage through intercalation in a subsurface storage system.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Nanoscience & Nanotechnology
Tuan A. Ho, Yifeng Wang, Carlos F. Jove Colon, Eric N. Coker
ACS APPLIED NANO MATERIALS
(2020)
Article
Energy & Fuels
Tuan A. Ho, Yifeng Wang
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2020)
Article
Chemistry, Multidisciplinary
Andrew W. Knight, Poorandokht Ilani-Kashkouli, Jacob A. Harvey, Jeffery A. Greathouse, Tuan A. Ho, Nadine Kabengi, Anastasia G. Ilgen
ENVIRONMENTAL SCIENCE-NANO
(2020)
Article
Chemistry, Physical
Tuan A. Ho, Yifeng Wang
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2019)
Article
Chemistry, Multidisciplinary
Tuan A. Ho, Yifeng Wang, Anastasia Ilgen, Louise J. Criscenti, Craig M. Tenney