Article
Chemistry, Physical
Yunjung Kim, Kyungbae Kim, Hyungeun Seo, Sung-Min Lee, Cheol-Min Park, Jae-Hun Kim
Summary: The study introduces a porous Sn2Nb2O7-graphene oxide composite material as an anode material for both lithium-ion and sodium-ion batteries, showing high reversible capacity and cycling stability. The enhanced electrode performance is attributed to the combination of porous structure and graphene oxide.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Qiong Peng, Javed Rehman, Kamel Eid, Ayman S. Alofi, Amel Laref, Munirah D. Albaqami, Reham Ghazi Alotabi, Mohamed F. Shibl
Summary: This study utilizes density-functional theory to investigate the performance of V4C3 MXene as an anode for Li-ion batteries and Na-ion batteries. The results show that V4C3 exhibits excellent electrical conductivity, low voltages, and good storage capacity and cycling performance, suggesting its potential application in future ion batteries.
Article
Chemistry, Physical
Shuaiwei Wang, Baocheng Yang
Summary: A three-dimensional porous carbon honeycomb material, Immm-C16, has been designed as a high capacity, low diffusion barrier, and stable anode material for Li-ion batteries. It shows fast charge/discharge rates and long cycling performance, potentially opening up a promising application for the next generation of LIBs.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Dong Won Kim, Sung Mi Jung, Chenrayan Senthil, Sun-Sik Kim, Byeong-Kwon Ju, Hyun Young Jung
Summary: The increase in capacity of porous graphene electrodes in Li storage devices is explained through morphological control and crystal structure transformation excluding functional groups. The synergy of edge effect and surface effect in reduced dimensional scale graphene in an open-porous structure significantly enhances capacity through multidimensional Li-ion accessibility and accumulation of Li atoms.
Review
Electrochemistry
Yao Liu, Wei Li, Yongyao Xia
Summary: While carbon, oxide, and silicon-based materials have limitations in current LIB applications, polyanionic compounds have gained attention for their ability to stabilize structures, adjust redox couples, and provide migration channels for guest ions, leading to electrode materials with long-term cycling, high energy density, and outstanding rate capability.
ELECTROCHEMICAL ENERGY REVIEWS
(2021)
Article
Chemistry, Physical
Darshil Chodvadiya, Ujjawal Jha, Piotr Spiewak, Krzysztof J. Kurzydlowski, Prafulla K. Jha
Summary: In this study, the applicability of the h-AlC monolayer as an anode material was investigated using first principles based density functional theory. It was found that the h-AlC monolayer exhibited excellent metallic behavior and high storage capacity for Li and Na ions. The diffusion barrier for Li and Na ions on the h-AlC monolayer was also found to be favorable. This research provides valuable experimental work for the future storage mechanisms of lithium-ion batteries and sodium-ion batteries.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Deepak S. Gavali, Yoshiyuki Kawazoe, Ranjit Thapa
Summary: The ratio of C3N and graphene in multilayer heterostructures plays a significant role in defining Li-ion battery performance, with higher graphene content leading to increased specific capacity. The proposed 2D heterostructures show promise as future anode materials for LIB's, with implications for further development in the field.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Sandeep Kanade, Manu Gautam, Anuradha Ambalkar, Yogesh Sethi, Musthafa Ottakam Thotiyl, Bharat B. Kale, Anil B. Gambhire
Summary: A facile synthesis of multilayered VC@rGO nanocomposite material has been demonstrated, which shows superior specific capacity, long-term cyclic stability, and rate performance when used as an anode in both lithium-ion and sodium-ion batteries.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Environmental
Jingbo Yang, Moujie Huang, Lingyun Xu, Xin Xia, Chuang Peng
Summary: This study reports the synthesis of mesoporous flower-like titanium-deficient anatase TiO2 (TDAT) and its application in both lithium-ion and sodium-ion batteries. The experimental results show that TDAT exhibits high capacity, high rate, and ultra-long cycle stability. Computational analysis reveals that Ti vacancies in TDAT reduce the energy barrier for ion intercalation, enhance diffusion kinetics, and provide additional storage and diffusion pathways.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Hussen Maseed, Shaikshavali Petnikota, Vadali V. S. S. Srikanth, Naresh Kumar Rotte, Madhavi Srinivasan, Francesco Bonaccorso, Vittorio Pellegrini, Mogalahalli Reddy
Summary: Highly crystalline few-layered graphene (hcFLG) synthesized using microwave exfoliation of in-house prepared graphene oxide exhibits unique lithiation electrochemistry in Li-ion coin cell. The hcFLG shows enhanced surface lithiation above 0.3 V and diffusion-controlled lithiation below 0.3 V, delivering reversible specific capacities at different current rates. It also demonstrates excellent rate capability and safe in-situ exfoliation, making it a promising candidate for emerging battery technologies like 'All Graphene Battery'.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Multidisciplinary
Yinger Xiang, Xinyu Hu, Xue Zhong, Wentao Deng, Guoqiang Zou, Hongshuai Hou, Xiaobo Ji
Summary: This study proposes a strategy of hierarchical double carbon/Sb composite to enhance the performance of Sb anode. The composite employs carbon spheres to encapsulate Sb nanoparticles with strong interfacial chemical bonds, and utilizes graphene as a conductive network to connect the composite materials. The hierarchical double carbon/Sb composite shows excellent rate and long cycling performance, and provides theoretical guidance for the development of metal anodes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Wen-Han Zhao, Feng-Yin Li, Hong-Xing Zhang, Roberts I. Eglitis, Jian Wang, Ran Jia
Summary: In this theoretical study, the physical properties of monolayer carbon allotrope Me-graphene were manipulated by doping with Al, Si, P, and Ge atoms. The doping systems showed even stronger mechanical strengths than the pristine one. The band gap of the system narrowed after Si doping, but had limited influence with Ge doping. Al and P doping resulted in metallic properties. The study also investigated the adsorption sites and energy profiles of Li atoms on Me-graphene for potential use in lithium-ion batteries.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Jun Qi, Jiaqing Zhang, Jiangwen Liu, Liuzhang Ouyang, Hui Wang, Lichun Yang, Renzong Hu
Summary: The Sn4P3@FLG developed by ball milling exhibits superior rate capability and cyclic stability as an anode material for lithium-ion batteries, with advantages of high tap density, stability, and fast electron and Li+ transfer kinetics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Electrochemistry
Daniela Sollinger, Thomas Berger, Gunther J. Redhammer, Juergen Schoiber, Simone Pokrant
Summary: By modifying the structure of layered H2V3O8, this study has improved its electrochemical properties, making it a promising cathode material for sodium-ion batteries and lithium-ion batteries.
Article
Chemistry, Physical
U. Younis, I. Muhammad, F. Qayyum, W. Wu, Q. Sun
Summary: A novel two-dimensional pentadiamond monolayer C-558 composed of pentagons and octagons is proposed, showing metallic properties and high ion adsorption sites, suitable for high-performance lithium, sodium, and potassium ion batteries.
MATERIALS TODAY ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Raghuram Gaddam, Dipobrato Sarbapalli, Jason Howard, Larry A. Curtiss, Rajeev S. Assary, Joaquin Rodriguez-Lopez
Summary: The fundamental process in non-aqueous redox flow battery (NRFB) operation is the electron transfer (ET) between the current collector electrode and redox-active organic molecules (redoxmers) in solution. The authors present a method utilizing scanning electrochemical microscopy (SECM) to evaluate interfacial ET kinetics between redoxmers and various electrode materials. This method enables the quantification of Butler-Volmer kinetic parameters and can be used to assess non-idealities in redoxmer/electrode/solvent systems for redox-flow battery research.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Physical
Kendrich O. Hatfield, Seth T. Putnam, Joaquin Rodriguez-Lopez
Summary: Graphitic carbon electrodes are crucial for electrochemical energy storage and conversion technologies. By combining surface-enhanced Raman scattering (SERS) with electrochemical methods using a hybrid substrate of graphene sheets and silver nanoparticles, the reversible redox response of adsorbed anthraquinone-2,6-disulfonate was observed. The SERS effect was confirmed, providing new opportunities for studying electrochemical processes on graphitic carbon electrodes.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
Patricia H. R. Martins, Adolfo I. B. Romo, Francisco O. N. da Silva, Otaciro R. Nascimento, Joaquin Rodriguez-Lopez, Izaura C. N. Diogenes, Luiz G. F. Lopes, Eduardo H. S. Sousa
Summary: The role and reactivity of metal complexes in interacting with DNA, especially metallonitrosyl compounds, have been poorly investigated. A nitrosyl compound cis-[Ru(bpy)(2)(SO3)(NO)](PF6)(A) exhibited promising biological activities, while a final product cis-[Ru(bpy)(2)(SO3)(H2O](B) showed important reactivity with H2O2 causing DNA degradation. The aqua product of the nitrosyl ruthenium complex should be further studied for its potential genotoxicity to DNA.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2023)
Article
Chemistry, Analytical
Oliver Rodriguez, Michael A. Pence, Joaquin Rodriguez-Lopez
Summary: This article develops an open-source Python library to control commercial potentiostats, which standardizes commands for different potentiostat models and enables automated experiments. The automation of the Randles-Seveik methodology using cyclic voltammetry was demonstrated by writing a Python script for data acquisition, analysis, and simulation. The library has potential applications in laboratory automation, advanced optimization, and machine learning.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Md. Sazzad Hossain, Adolfo I. B. Romo, Seth T. Putnam, Jahan Dawlaty, Veronica Augustyn, Joaquin Rodriguez-Lopez
Summary: Recently, non-Faradaic effects have been found to influence the electronic structure and reactivity of electrode-bound species. In this study, the near-electrode dissociation of N-heterocycle-BF3 Lewis adducts was investigated outside of the redox potential window. Through the use of scanning electrochemical microscopy and confocal fluorescence spectroscopy, a potential-dependent depletion of the adduct near the electrode was detected. This study suggests the presence of an electro-inductive effect on the N-heterocycle, and highlights the potential of electrostatics in field-driven electrocatalytic and electro-synthetic processes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Electrochemistry
Andrew S. Danis, Michael J. Counihan, Kendrich O. Hatfield, Jingjing Zhang, Garvit Agarwal, Lu Zhang, Rajeev S. Assary, Joaquin Rodriguez-Lopez
Summary: Non-aqueous redox flow batteries with high voltages are crucial for grid-level energy storage technologies, despite the challenge of redoxmer decomposition. In this study, we investigate the decomposition mechanisms of the catholyte candidate C7 in the presence of pyridine using spectroelectrochemistry. By colocalizing Raman microscopy and scanning electrochemical microscopy, we quantify the decomposition rates and identify the reaction intermediates and products. Our findings emphasize the importance of spatiotemporal resolution in understanding the behavior of materials in redox flow batteries.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Jacob T. Bryant, Matthew W. Logan, Zhihengyu Chen, Marcus Djokic, Daniel R. Cairnie, Demetrius A. Vazquez-Molina, A. Nijamudheen, Kyle R. Langlois, Michael J. Markley, Gisselle Pombar, Ashley A. Holland, Jonathan D. Caranto, James K. Harper, Amanda J. Morris, Jose L. Mendoza-Cortes, Titel Jurca, Karena W. Chapman, Fernando J. Uribe-Romo
Summary: Metal-organic frameworks (MOFs) with photoredox activity have tunable pore sizes and electronic structures, making them suitable for systematic studies and synthetic control. In this study, a library of photoredox-active MOFs with different link sizes and electron-donating group functionalization was synthesized, and their effects on substrate adsorption and photoredox transformation were investigated. The results showed that longer links and increased electronic functionalization improved photocatalytic rates significantly.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Electrochemistry
Yunhao Xiao, Panni Zheng, Tairan Yang, Sriya Karambor Chakravarty, Joaquin Rodriguez-Lopez, Alexander Urban, Zheng Li
Summary: An integrated combinatorial synthesis, characterization, and testing methodology and platform is proposed and developed for high-throughput exploration of Li-ion rechargeable battery cathode chemistries. This article describes the design of the platform's combinatorial synthesis part and its prototype performance. The synthesized LiNiO2 materials show excellent electrochemical performance comparable to manually synthesized LiNiO2.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Abhiroop Mishra, Junyoung Kim, Michelle Zorigt, Adolfo I. B. Romo, Raghuram Gaddam, James E. Braun, Davide Ziviani, Joaquin Rodriguez-Lopez
Summary: Air conditioning, space heating, and refrigeration consume a large amount of electricity in the U.S. buildings, accounting for around 40% of the total usage. The development of energy efficient heat pump technologies is crucial to improve the energy consumption in this sector. Electro-chemical looping heat pump (ELHP) technology shows promise as an alternative to traditional vapor compression systems, offering potential improvements in performance and energy consumption. In this study, the oxidation of isopropanol (IPA) to acetone mediated by 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) was investigated as a promising system for ELHP, with 4-Methoxy-TEMPO identified as the most promising candidate.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Computer Science, Artificial Intelligence
Eric Dolores-Cuenca, Jose Antonio Arciniega-Nevarez, Anh Nguyen, Amanda Yitong Zou, Luke Van Popering, Nathan Crock, Gordon Erlebacher, Jose L. L. Mendoza-Cortes
Summary: This paper investigates the flow of signals through linear paths with a nonlinear condition where nodes emit signals based on external stimuli or the coincidence of incoming signals. These nodes form polychrony groups and can lead to cascades, where the number of nodes activated by other nodes exceeds the number of externally activated nodes. The difference between these two numbers is defined as profit. The paper predicts activation conditions for specific vertices and provides an algorithm to efficiently reconstruct cascades, establishing a dictionary between polychrony groups and graph theory. The resulting graphs, called chinampas, can be topologically classified, and enumerations and descriptions of specific chinampas are provided.
Article
Multidisciplinary Sciences
Yuting Zhou, Joaquin Rodriguez-Lopez, Jeffrey S. Moore
Summary: Post-consumer plastic waste has prompted the development of deconstruction methods to recover valuable substances, but depolymerization of highly crystalline engineering thermoplastics remains challenging. In this study, the authors demonstrate the electrochemical depolymerization of polyoxymethylene into repolymerizable monomer under ambient conditions. Through various experiments, they uncover the heterogeneous electro-mediated acid depolymerization mechanism and the dual role of the co-solvent HFIP. This research highlights the potential of electromediated depolymerization in sustainable chemistry by merging renewable energy and circular plastic economy concepts.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Andy D. Zapata-Escobar, Alejandro F. Maldonado, Jose L. Mendoza-Cortes, Gustavo A. Aucar
Summary: In this article, the electronic mechanisms underlying NMR magnetic shieldings in molecules containing heavy atoms are investigated. The results obtained from the innovative LRESC-Loc model are presented, which employs localized molecular orbitals (LMOs) instead of canonical MOs. The electronic origins of trends and behaviors in the molecular systems analyzed are elucidated, including the role of the different relativistic mechanisms involved.
Article
Chemistry, Analytical
Michael A. Pence, Oliver Rodriguez, Nikita G. Lukhanin, Charles M. Schroeder, Joaquin Rodriguez-Lopez
Summary: In this study, a novel platform is developed for determining the rate constant of chemical reactions in solution. The platform uses microfabricated interdigitated electrode arrays (IDAs) with variable gap widths to achieve automated, multiplexed, and robust measurements. The results show that the natural logarithm of collection efficiency is linear with respect to gap width, enabling the determination of the decomposition rate constant of electrogenerated species. The platform allows for the characterization of a wide range of reactions under various conditions and can be applied in high-throughput workflows.
ACS MEASUREMENT SCIENCE AU
(2023)
Article
Polymer Science
Niloofar Safaie, Austin Rodriguez, Gourhari Jana, Jessica Smak, Jose L. Mendoza-Cortes, Robert C. C. Ferrier Jr
Summary: Polyethers are important polymers made from the polymerization of functional epoxide monomers. Our study elucidates the mechanism of epoxide polymerization with aluminum-based compounds and reveals the impact of N-Al adduct catalyst chemistry on the polymerization rate and polydispersity. Our findings provide insights for enhancing catalyst and initiator design and advancing the synthesis of polyethers.
Article
Chemistry, Multidisciplinary
Abdelilah Asserghine, Aravind Baby, Seth T. Putnam, Peisen Qian, Elizabeth Gao, Huimin Zhao, Joaquin Rodriguez-Lopez
Summary: This study investigates the impact of the oxygen reduction reaction (ORR) on the sulfation of LAB anodes, and finds that the presence of oxygen significantly enhances the sulfation reaction and leads to the formation of reactive oxygen species (ROS). The findings have important implications for the cycle life of LABs and the generation of CO and CO2 during related chemical reactions.