Article
Engineering, Electrical & Electronic
A. K. Panda, Lutu Sahoo, N. C. Nayak, B. N. Parida, R. K. Parida
Summary: The polycrystalline PCBNO is synthesized using mixed oxide technique, and its structural distortion, surface morphology, and elemental purity are characterized by XRD, SEM, and EDS. UV-visible spectroscopy reveals a strong absorption with a cutoff wavelength of 612 nm and an optical bandgap of 2.50 eV in direct transition, indicating its electro-optic nature. LCR study shows that the PCBNO exhibits a dielectric constant of approximately 507 and a loss tangent of approximately 0.207 at ambient conditions. Ferroelectric to paraelectric transition occurs at temperatures beyond 370 degrees C for a 100-Hz applied field and 420 degrees C for higher frequencies. The conduction property follows the Jonscher law and the activation energy is determined to be 1.398 eV through Arrhenius's relation.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Environmental
Rinat Attias, Sourav Bhowmick, Yoed Tsur
Summary: The reaction kinetics of RuO2 were accurately evaluated using impedance spectroscopy analysis by genetic programming (ISGP) with the distribution function of relaxation times (DFRT) model. The DFRT method proved to be more precise and effective in determining the reaction kinetics compared to the classical Tafel method.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
B. M. G. Melo, Francisco J. A. Loureiro, Duncan P. Fagg, L. C. Costa, M. P. F. Graca
Summary: Electrochemical Impedance Spectroscopy (EIS) combined with the estimation of Distribution Function of Relaxation Times (DFRT) helps differentiate overlapped polarizations and understand suitable electrical circuit models. A user-friendly, free graphical interface is presented for transforming DFRT data into synthetic impedance spectra and adjusting DFRT peaks for automatic estimation of resistance, time constants, and capacitances of each response.
ELECTROCHIMICA ACTA
(2021)
Article
Electrochemistry
Maria Luisa Sartorelli, Aldo Matthaeus Cutrim Gomes, Muriel de Pauli, Carleane Patricia da Silva Reis, Rafael Bento Serpa, Francoise Toledo Reis, Everton Fabian Jasinski, Lucas Natalio Chavero, Robson Lourenco Cavalcante, Daiana Galvao, Zair Ocubo Raulino, Yihao Zhou, Yaying Feng, Tasso von Windheim, Mariana Vasquez Sanchez, Edgard Ngaboyamahina, Jason J. Amsden, Charles B. Parker, Jeffrey T. Glass
Summary: A novel generalized capacitance concept is proposed in this paper to describe the impedance spectroscopy characteristics of different electrodes. Through experiments on nanostructured silicon electrodes, it is demonstrated that the proposed method outperforms traditional analysis in terms of accuracy and applicability.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Michael Braig, Roswitha Zeis
Summary: Polybenzimidazole-based electrochemical hydrogen pumps (EHPs) can separate hydrogen from gas mixtures at low cell overpotential. They have robustness towards catalyst poisoning by common impurities in steam reformate and can operate at temperatures up to 180 degrees C. The physico-chemical processes in EHPs supplied with H2 contaminated with N2, CO2, and CO were investigated using electrochemical impedance spectroscopy (EIS) and distribution of relaxation times (DRT) analysis. Five different processes were identified in the DRT spectrum, including proton transport, hydrogen evolution and oxidation reactions, mass transport in the anode gas diffusion electrode, and movement of phosphoric acid anions.
JOURNAL OF POWER SOURCES
(2023)
Article
Plant Sciences
Mutsumi Sugiyama, Mayu Okajima
Summary: The application of electrochemical impedance spectroscopy (EIS) analytical theory in characterizing cellular tissues and cell membrane activities, with a focus on direct observation of ions in plant cells, was investigated in this study. A new equivalent circuit, involving a non-uniform capacitance-like element called 'constant phase element', was proposed for cellular tissues based on accurate understanding of in situ plant observation using EIS measurements. The time dependence of the proposed circuit model was found to be able to evaluate the non-uniformity of interfacial polarization of the cell membrane through EIS, using non-destructive surface-contact electrodes. Further investigations are still required, but the results indicate the potential of the proposed equivalent circuit in revealing plant dynamics and non-destructive plant monitoring.
THEORETICAL AND EXPERIMENTAL PLANT PHYSIOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Danian Liu, Jingwen Wang, Wenhai Peng, Xinzhu Wang, Hua Ren, Donald W. Kirk
Summary: A semiconductor polyaniline in situ modified rGO nanosheets were proposed to maintain a stable dielectric constant at high frequencies. The pi-pi interface interaction blocked the migration of electrons, resulting in a reduction in relaxation time and a stable dielectric constant. This mechanism has great potential for various high-frequency devices.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Allan J. M. Araujo, Francisco J. A. Loureiro, Laura I. Holz, Vanessa C. D. Graca, Joao P. F. Grilo, Daniel A. Macedo, Carlos A. Paskocimas, Duncan P. Fagg
Summary: The study demonstrates that adding an active interlayer of Ce0.8Pr0.2O2-delta (CPO, + 2 mol% Co) can improve the electrochemical performance of C349 in solid oxide cells, especially at high temperatures. However, at lower temperatures, the interlayer pathway of CPO + Co may dominate due to its higher ionic conductivity compared to C349.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Analytical
Jia Wang, Qiu-An Huang, Weiheng Li, Juan Wang, Yuxuan Bai, Yufeng Zhao, Xifei Li, Jiujun Zhang
Summary: EIS is an important diagnostic tool, but identifying pseudo peaks decoded by the DRT/DDC method remains a challenge. This study presents new insights from the perspective of symmetry, categorizing pseudo peaks into three types and quantitatively evaluating the decoded peaks. The solution to pseudo peaks decoded by the DRT/DDC method was validated through simulated impedance spectra.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Yuan Zhou, Zhixuan Tian, Yanzhi Cai, Chengye Liu, Yifan Li, Xiang Li
Summary: Tm2O3 was introduced into the KNN structure for the first time in this study, and (1-x)K0.5Na0.5Nb0.7Ta0.3O3xTm(2)O(3) (x=0.1-1.0%) powders were synthesized through a solvothermal method. The corresponding ceramics were prepared via atmospheric sintering. The introduction of Tm3+ promoted the refinement of KNN grain and resulted in significant increase in room-temperature dielectric permittivity and relaxation dispersion.
CERAMICS INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
T. Paul, P. W. Chi, Phillip M. Wu, M. K. Wu
Summary: In this paper, DRT functions are numerically calculated for different systems with impedance data, and the quality of impedance data is checked using Kramers-Kronig relations. The DRTs are calculated using Tikhonov regularization method and the physical significance of peaks are discussed through peak fitting program.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Analytical
M. Zaki, Ezz El Shafie, Soha A. Abdel-Gawad, Amany M. Fekry, Renad S. El-Kamel, M. Shehata
Summary: A novel electrochemical sensor for nicotine detection has been successfully prepared by depositing manganese/copper nanoparticles on the surface of a carbon paste electrode. This sensor showed good catalytic activity for the anodic oxidation of nicotine in potassium phosphate buffer solutions of different pH values. It exhibited high sensitivity and stability for detecting nicotine in urine and tobacco samples.
Article
Biotechnology & Applied Microbiology
Varun Vyas, Niranjan G. Kotla, Yury Rochev, Anup Poudel, Manus Biggs
Summary: Alternating current scanning electrochemical microscopy (AC-SECM) is a powerful tool for studying the electrochemical reactivity of surfaces, including biological interfaces and metallic surfaces. AC-SECM imaging is derived from electrochemical impedance spectroscopy (EIS), which has been used for a century to describe molecular behavior in solution or on surfaces. This technique has important predictive implications for developing minimally invasive and smart medical devices by measuring tissue electrochemical changes.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Amin Moradpour, Manuel Kasper, Johannes Hoffmann, Ferry Kienberger
Summary: This paper presents a comprehensive uncertainty analysis of calibrated electrochemical impedance spectroscopy (EIS) for batteries, aiming to identify the effect of fixture repeatability and measurement noise on the measured impedances. A specific error model is assigned to each uncertainty source, and the model parameters' real and imaginary parts are characterized through impedance measurements. The errors are propagated through the calibration and correction functions, and the resulting uncertainty is shown as ellipsoids in the Nyquist plot.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Materials Science, Multidisciplinary
S. Udhayakumar, G. Jagadish Kumar, E. Senthil Kumar, M. Navaneethan, K. Kamala Bharathi
Summary: The introduction of Sr doping into LiFe5O8 bulk material results in an enhanced dielectric constant and reduced dielectric loss. The Sr-doped samples exhibit relaxation behavior suitable for high frequency applications. Temperature and frequency dependent measurements show promising results for practical use.
Article
Electrochemistry
Pedro Cordoba-Torres
ELECTROCHIMICA ACTA
(2015)
Article
Chemistry, Analytical
P. Cordoba-Torres, N. T. C. Oliveira, C. Bolfarini, V. Roche, R. P. Nogueira
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2015)
Article
Chemistry, Physical
Pedro Cordoba-Torres, Thiago J. Mesquita, Ricardo P. Nogueira
JOURNAL OF PHYSICAL CHEMISTRY C
(2015)
Article
Mechanics
Pedro Cordoba-Torres, Silvia N. Santalla, Rodolfo Cuerno, Javier Rodriguez-Laguna
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2018)
Article
Electrochemistry
P. Cordoba-Torres, M. Keddam, R. P. Nogueira
ELECTROCHIMICA ACTA
(2008)
Article
Electrochemistry
P. Cordoba-Torres, Ricardo P. Nogueira
ELECTROCHIMICA ACTA
(2008)
Article
Electrochemistry
P. Cordoba-Torres, M. Keddam, R. P. Nogueira
ELECTROCHIMICA ACTA
(2009)
Article
Electrochemistry
P. Cordoba-Torres, T. J. Mesquita, O. Devos, B. Tribollet, V. Roche, R. P. Nogueira
ELECTROCHIMICA ACTA
(2012)
Article
Electrochemistry
P. Cordoba-Torres, T. J. Mesquita, R. P. Nogueira
ELECTROCHIMICA ACTA
(2013)
Article
Electrochemistry
P. Cordoba-Torres, T. J. Mesquita, R. P. Nogueira
ELECTROCHIMICA ACTA
(2013)
Article
Physics, Fluids & Plasmas
P. Cordoba-Torres, I. N. Bastos, R. P. Nogueira
Article
Physics, Multidisciplinary
P. Cordoba-Torres, T. J. Mesquita, I. N. Bastos, R. P. Nogueira
PHYSICAL REVIEW LETTERS
(2009)
Article
Electrochemistry
Pedro Cordoba-Torres
ELECTROCHIMICA ACTA
(2017)
Article
Electrochemistry
Pedro Cordoba-Torres
ELECTROCHIMICA ACTA
(2017)
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)