Article
Engineering, Mechanical
Zhaoli Zheng, Chao Fu, Weidong Zhu, Jiepeng Zhao, Kaifu Zhang, Kuan Lu
Summary: This paper proposes a non-intrusive technique for propagating parameter uncertainties in nonlinear mechanical systems using frequency normalisation. The technique effectively addresses the multisolution dilemma found in resonance areas and resolves the issue of spurious peaks around nonlinear peaks and discontinuous points. It is demonstrated to be effective in uncertainty analysis of complex nonlinear vibration systems and can be easily applied to other nonlinear systems.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Giovanni Formica, Walter Lacarbonara, Hiroshi Yabuno
Summary: A nonlinear MEMS multimass sensor was investigated numerically, consisting of an array of nonlinear microcantilevers clamped to a shuttle mass. The linear and nonlinear detection capabilities of the device were explored by computing the shifts of the frequency response peaks caused by mass deposition. The sensitivity of the mass sensor in both linear and nonlinear dynamic ranges was improved due to larger nonlinear frequency shifts at resonance (up to 12%).
Article
Engineering, Civil
Shahin Farahmandpey, Pooyan Broumand, Seyyed Mehrab Amiri, Mohammad Reza Shekari
Summary: This paper investigates the simultaneous influences of base-isolator devices and annular baffles on the dynamic behavior of a three-dimensional cylindrical water storage tank. The numerical simulations reveal that relying only on the first convective mode frequency might not achieve satisfactory performance in certain cases. The results suggest that for slender tanks, a baffle geometry should be selected for each earthquake frequency content and analyzed over time to obtain the best performance, while for broad tanks, a baffle selection independent of the earthquake frequency content might be acceptable.
Article
Engineering, Multidisciplinary
Mohammad Malikan, Victor A. Eremeyev
Summary: This study introduces a new approach to address micro-mechanic problems using the modified couple stress theory. The model considers micro-particles' rotations, which are crucial for microstructural materials and small scales. While the framework is suitable for static situations, it is necessary to consider micro-rotations' mass inertias for dynamic investigations. The solution methods are validated using numerical models, highlighting the importance of static and dynamic length scale parameters in studying microstructure vibrations.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2023)
Article
Engineering, Multidisciplinary
Gao Hong, Deng Zhongmin
Summary: Nonlinear structural dynamics systems with hybrid uncertainties require mathematical models to accurately predict their behavior. To address the hybrid uncertainty often encountered in engineering applications, the NSDAHU method is proposed, which uses random interval moment and random interval perturbation methods to calculate the statistical characteristics of nonlinear structural dynamic responses. The NSDAHU method is verified using Monte Carlo simulation method and can solve hybrid random interval problems, as well as single interval, single random, and linear structural dynamics problems.
APPLIED MATHEMATICAL MODELLING
(2023)
Review
Chemistry, Physical
Tanja Vidakovic-Koch, Tamara Milicic, Luka A. Zivkovic, Hoon Seng Chan, Ulrike Krewer, Menka Petkovska
Summary: Nonlinear Frequency Response Analysis (NFRA) serves as an extension of electrochemical impedance spectroscopy, providing a comprehensive representation of system response and linking model parameters to observed phenomena. This article discusses various theoretical NFRA approaches and recent application examples, showcasing the advantages and drawbacks of analyzing system response using different methods. In addition, it demonstrates how to extract experimental harmonic values and analyze them.
CURRENT OPINION IN ELECTROCHEMISTRY
(2021)
Article
Construction & Building Technology
Mihail Iancovici, Georgiana Ionica, Florin Pavel, Florin Mota, George Bogdan Nica
Summary: This paper predicts the nonlinear wind-induced effects on structures using a non-commercial software based on the 3D Force Analogy Method (3D-FAM). The study involves dynamic nonlinear analyses for different mean hourly wind speeds and wind directions, monitoring the inelastic behavior of the building and quantifying it through damage indices at different levels.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Grzegorz Stepniak, Jerzy Siuzdak
Summary: The influence of LED chip parameters on the nonlinear dynamic response was investigated. The dynamic character of LED nonlinearity was demonstrated through the analysis of LED cores under different parameters. Two measures of LED nonlinearity were proposed. The analysis revealed that doping concentration and bias current have different effects on the nonlinear behavior of LED.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Energy & Fuels
Philip R. Herrington, Bryony James, Theunis F. P. Henning
Summary: The study investigated the formation of carbonyl compounds during the oxidation of bitumen at 50 degrees C, showing that the concentration of bitumen reactive species did not significantly affect the reaction rate regardless of the solvent used or the stage of reaction.
Article
Engineering, Mechanical
Zhenyuan Li, Yimin Zhang, Changyou Li, Mengtao Xu, Weibing Dai, Zhendong Liu
Summary: In this paper, a nonlinear dynamic model of bolted joint structure is proposed based on the fractal contact model, taking into account the relative sliding behavior. The model is experimentally validated and numerical simulation results show various nonlinear phenomena. The model predictions are helpful for preventing resonance and instability.
NONLINEAR DYNAMICS
(2022)
Article
Mathematics, Applied
Aydin A. Cecen, Pawan Jain, Linlan Xiao
Summary: The study found that HFT and machine trading appear to make return series more predictable, but do not affect the Markov property.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2021)
Article
Mathematics
Jaehun Lee, Younggeun Park, Yeji Lee, Seongmin Chang
Summary: This paper proposes an efficient and adaptive frequency sampling algorithm for frequency response analysis using dynamic condensation-based reduced-order modeling. The algorithm constructs multiple local reduced-order models (ROMs) at sample frequencies to enhance efficiency and accuracy. The method is validated through frequency response analysis on numerical examples, including a large-scale structural and dynamic system.
Article
Chemistry, Multidisciplinary
Pawel Przybylski, Adrian Konopko, Piotr Letowski, Katarzyna Jodko-Piorecka, Grzegorz Litwinienko
Summary: The reaction rates of a 2,2-diphenyl-1-picrylhydrazyl radical (dpph) with different phenols in methanol were measured to estimate the antiradical activity of phenolic compounds. The concentration of phenols was found to affect the reaction kinetics, with diluted phenols showing different kinetics compared to non-diluted solutions. This effect was explained by the ratio of [ArO-]/[ArOH], which leads to a higher contribution of electron transfer (ET) over hydrogen atom transfer (HAT) in diluted phenols. Simplified analysis of the reaction kinetics allowed for the estimation of k(ET)/k(HAT) ratios and the rate constants k(ET) for each phenol studied. These results demonstrate the importance of phenol concentration in determining the reaction mechanism and overall kinetics.
Article
Engineering, Marine
Zhanyang Chen, Hongbin Gui, Xiyu Liao, Mengchao Du
Summary: This study introduces a three-dimensional nonlinear hydroelastic theory and conducts numerical simulations on the dynamic response of a flexible hull, comparing different methods and discussing their reasonable applicable conditions for structural design.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Physical
Iranna Udachyan, Jayesh T. Bhanushali, Shanti G. Patra, Tomer Zidki, Amir Mizrahi, Dan Meyerstein
Summary: Nickel carbonate was electrodeposited on Pt and Pd electrode surfaces and characterized using various techniques. The electrodeposited Ni-2(CO3)(3)/Pt and Ni-2(CO3)(3)/Pd showed enhanced activity for methanol oxidation in KOH and Na2CO3 electrolytes. The Ni-2(CO3)(3)/Pt catalyst exhibited the highest forward scan peak current density of 19.8 mA cm(-2).
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Youngseung Na, Prashant Khadke, Andreas Gluesen, Nicola Kimiaie, Martin Mueller, Ulrike Krewer
Summary: The electrochemical behavior of direct methanol fuel cells (DMFCs) is influenced by the concentration of methanol. Monitoring the methanol concentration in the fuel circulation loop is crucial for the efficient operation of DMFC systems. This study presents a robust electrochemical methanol sensing technique that is not affected by temperature, cell degradation, and membrane electrode assembly (MEA) type. The proposed method achieves high accuracy and is expected to enhance the reliability and control logic of DMFC systems.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
F. Baakes, M. Luethe, M. Gerasimov, V Laue, F. Roeder, P. B. Balbuena, U. Krewer
Summary: This study developed a thermal runaway model that rigorously models the thermodynamic properties and reactions of each component within a Li-ion battery, considering the vapor-liquid equilibria of a binary solvent mixture for the first time. Simulations revealed a fragile equilibrium in the early phases of self heating and the influence of autocatalytic cycles and contaminants on thermal runaway.
JOURNAL OF POWER SOURCES
(2022)
Article
Green & Sustainable Science & Technology
Matthias Thomitzek, Oke Schmidt, Gabriela Ventura Silva, Hassan Karaki, Mark Lippke, Ulrike Krewer, Daniel Schroeder, Arno Kwade, Christoph Herrmann
Summary: The application of batteries in electric vehicles and stationary energy-storage systems is promising, but the battery production process is complex and has untapped potential. This study presents a framework that predicts the impact of processes on battery performance and provides decision support to improve production efficiency.
Article
Engineering, Chemical
Gregor D. Wehinger, Matteo Ambrosetti, Raffaele Cheula, Zhao-Bin Ding, Martin Isoz, Bjarne Kreitz, Kevin Kuhlmann, Martin Kutscherauer, Kaustav Niyogi, Jeroen Poissonnier, Romain Reocreux, Dominik Rudolf, Janika Wagner, Ronny Zimmermann, Mauro Bracconi, Hannsjoerg Freund, Ulrike Krewer
Summary: This paper reports the results of a perspective workshop discussing the current status and future needs for multiscale modeling in reaction engineering. The research topic is highly challenging and interdisciplinary in the chemical engineering community. The paper highlights recent achievements, challenges, and future needs in various areas such as reactors and cells, heterogeneous catalytic processes, and coupling first-principles kinetic models with CFD simulations.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Electrochemistry
Somayeh Toghyani, Florian Baakes, Ningxin Zhang, Helmut Kuhnelt, Walter Cistjakov, Ulrike Krewer
Summary: As the aircraft industry becomes more focused on sustainable aviation, there is increasing interest in hybrid-electric propulsion systems with batteries that have higher energy density to reduce fuel consumption. Next-generation chemistries like oxide-based all-solid-state Li-battery (ASSB) technologies could benefit future aircrafts. However, it is time- and resource-intensive to experimentally produce and evaluate a wide range of design parameters for maximizing the energy density of ASSB. Physics-based modeling offers a more efficient way to identify optimal designs for battery cells with high energy density.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Electrochemistry
Walter Cistjakov, Vincent Laue, Fridolin Roeder, Ulrike Krewer
Summary: All-solid state lithium polymer batteries offer high safety and energy density, and their success depends on an improved design of cathode manufacturing process. A model-based analysis was conducted to study the impact of cathode particle structure on electrochemical cell performance. The study found that the formation of large agglomerates during production of solid-state cathodes significantly affects transport properties.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Janis Geppert, Philipp Roese, Steffen Czioska, Daniel Escalera-Lopez, Alexey Boubnov, Erisa Saraci, Serhiy Cherevko, Jan-Dierk Grunwaldt, Ulrike Krewer
Summary: The microkinetics of the electrocatalytic oxygen evolution reaction were investigated using a dynamic microkinetic model. The study found that the interaction between water adsorption, deprotonation, and oxygen detachment processes limits the overall reaction turnover. Material changes were identified as the main cause of electrocatalytic activity loss.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Hoon Seng Chan, Edmund J. F. Dickinson, Tom P. Heins, Juyeon Park, Miran Gaberscek, Yan Ying Lee, Marco Heinrich, Vanesa Ruiz, Emilio Napolitano, Pertti Kauranen, Ekaterina Fedorovskaya, Joze Moskon, Tanja Kallio, Seyedabolfazl Mousavihashemi, Ulrike Krewer, Gareth Hinds, Steffen Seitz
Summary: Various methods based on impedance and nonlinear frequency response are evaluated for determining the state-of-health (SOH) of commercial lithium-ion cells. Frequency response-based measurements provide a spectral representation of the underlying physicochemical processes in the cell, giving evidence about its internal physical state. These methods can be carried out more rapidly and offer more efficiency in determining the SOH of aged lithium-ion cells.
JOURNAL OF POWER SOURCES
(2022)
Article
Electrochemistry
Janis Geppert, Philipp Roese, Swantje Pauer, Ulrike Krewer
Summary: The performance of electrocatalytic water splitting in polymer electrolyte membrane electrolysis is determined by the microkinetic processes of the oxygen evolution reaction (OER). The surface of the binary transition metal oxides IrO2 and RuO2 mixtures consists of active sites of both Ir and Ru, which undergo the OER mechanism independently and at different overpotentials. By applying microkinetic modeling and parameterization via cyclic voltammograms, a correlation between performance and the relative Ir content is found, which can be explained by two different deprotonation steps.
Article
Green & Sustainable Science & Technology
Alexander Barke, Walter Cistjakov, Dominik Steckermeier, Christian Thies, Jan-Linus Popien, Peter Michalowski, Sofia Pinheiro Melo, Felipe Cerdas, Christoph Herrmann, Ulrike Krewer, Arno Kwade, Thomas S. Spengler
Summary: The use of novel battery technologies in short-haul electric aircraft supports the aviation sector's sustainable development goals, but the production of these batteries can have adverse environmental and socio-economic impacts. This paper investigates alternative technologies for lithium-sulfur all-solid-state batteries (LiS-ASSBs) in terms of their contribution to sustainable development goals (SDGs). The study applies a life cycle sustainability assessment approach to analyze four LiS-ASSB configurations and compares them to a benchmark lithium-sulfur battery with a liquid electrolyte. The results show that LiS-ASSB technologies generally have a positive contribution to SDG achievement, but the battery configuration with the best technical characteristics may not be the most promising in terms of SDG achievement. Sensitivity analysis reveals that the results are robust against weighting factors within the SDG quantification method.
JOURNAL OF INDUSTRIAL ECOLOGY
(2023)
Article
Engineering, Environmental
Fabian Kubannek, Avital Zhegur-Khais, Songlin Li, Dario R. Dekel, Ulrike Krewer
Summary: We analyze the transport of anions in anion exchange membranes to understand the decarbonation process and its dynamics. The model covers the diffusive and migrative transport of water, carbonate anions, and hydroxide anions. The results reveal the factors affecting the decarbonation dynamics and provide insights into the properties of AEMs that are critical for electrochemical devices.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Michail Gerasimov, Fernando A. Soto, Janika Wagner, Florian Baakes, Ningxuan Guo, Francisco Ospina-Acevedo, Fridolin Roeder, Perla B. Balbuena, Ulrike Krewer
Summary: Lithium metal batteries hold great promise for future energy storage, but the formation of a stable and efficient Solid Electrolyte Interphase (SEI) remains a challenge. This study utilizes a combination of molecular dynamics, density functional theory, and 3D-kinetic Monte Carlo simulations to analyze the internal species distribution and geometrical aspects of the native SEI. The simulations confirm the layered structure of the SEI and reveal the prevalence of corrosion processes in the formation of the SEI. This novel modeling approach provides valuable insights for improving battery performance and durability.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
David Bernhard, Thomas Kadyk, Sebastian Kirsch, Hannes Scholz, Ulrike Krewer
Summary: This work presents a model for predicting and analyzing voltage losses in proton exchange membrane fuel cells during accelerated stress testing. The model consists of two submodels - one describing the degradation of the catalyst active surface using a statistical physics-based approach, and another incorporating the degradation of catalyst activity. The model allows the description of catalyst surface reduction, changes in Tafel slope and exchange current density, and voltage losses.
JOURNAL OF POWER SOURCES
(2023)
Article
Electrochemistry
Marco Heinrich, Nicolas Wolff, Steffen Seitz, Ulrike Krewer
Summary: A new measurement method is presented to assign features of impedance spectra of full Li-ion battery cells to single electrodes by imprinting temperature gradients. This allows for a reliable identification of changes in impedance spectra from the anode or the cathode.
Article
Electrochemistry
Daniel Witt, Fridolin Roeder, Ulrike Krewer
Summary: The quality of lithium-ion batteries is affected by the formation of the solid electrolyte interphase (SEI). Fast and economically scalable SEI diagnostics are essential for understanding its impact on cell performance and aging. Combining physicochemical SEI and cell modeling allows for a detailed analysis of both measurement types, providing insights into the SEI's influence on battery performance.
BATTERIES & SUPERCAPS
(2022)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)
