Article
Chemistry, Physical
Allan J. M. Araujo, Francisco J. A. Loureiro, Rafael A. Raimundo, Daniel A. Macedo, Carlos A. Paskocimas, Duncan P. Fagg
Summary: This study investigates the potential of the [BaCoO3] [BaCo8O11] family as a cathode or anode for solid oxide fuel cells or electrolyser cells. The electrochemical analysis shows that the performance of the Ba2Co9O14/Ce0.8Gd0.2O2-δ composite electrode is improved under cathodic polarization but impaired under anodic polarization. These results highlight the higher potential of Ba2Co9O14 as a cathode material for intermediate-temperature solid oxide fuel cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
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
Energy & Fuels
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: This article analyzes the electrode performance of misfit-layered calcium cobaltite as a cathode and anode for solid oxide fuel cell and solid oxide electrolysis cell, respectively, using electrochemical impedance spectroscopy. The addition of Ce0.8Gd0.2O2-delta as a composite electrode phase significantly improves the electrochemical processes and reduces the polarization resistance. Short-term stability testing demonstrates that the composite material shows stable current density and no observable microstructure delamination at 700°C.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Electrochemistry
Allan J. M. Araujo, Francisco J. A. Loureiro, Joao P. F. Grilo, Daniel A. Macedo, Carlos A. Paskocimas, Duncan P. Fagg
Summary: This study investigates the use of composite oxygen electrodes in Solid Oxide Cells (SOCs) using the material Ca3Co4O9+delta - C349. The low intrinsic level of ionic conductivity in this material restricts its electrochemical performance, necessitating the addition of an ionic-conducting composite phase such as Ce0.8Gd0.2O2-delta (CGO). However, little attention has been given to alternative ionic phases like Ce0.8Pr0.2O2-delta, which also offer p-type conductivity. The study demonstrates that the oxygen reaction pathway in the CGO-based electrode is preferential and performs better at high temperatures and low oxygen partial pressures, while the CPO-based electrode performs better under highly oxidising conditions and at low temperatures.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Zhongtao Ma, Waynah Lou Dacayan, Christodoulos Chatzichristodoulou, Kristian Speranza Molhave, Francesco Maria Chiabrera, Wenjing Zhang, Soren Bredmose Simonsen
Summary: The combination of electrical impedance spectroscopy (EIS) and environmental transmission electron microscopy (ETEM) is demonstrated by testing a specially designed micro gadolinia-doped ceria (CGO) sample. The EIS-TEM method provides valuable information on the structural and compositional aspects relevant to electrochemical performance. The developed platform is important for understanding nanoscale processes in green energy technologies.
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
Electrochemistry
M. E. Aristizabal, J. Vega-Castillo, Y. M. Torres, M. D. S. Sanchez, F. Prado
Summary: The effects of B site deficiency on the cubic perovskite La0.8Pr0.2BaCo2-yO6-6 (0.00 ≤ y ≤ 0.10) were studied, including crystal structure, phase relationships, surface, and high temperature properties. Co deficiency at the B site prevented the formation of secondary phases and maintained the cubic crystal structure. The presence of Co3+ and Pr3+ was confirmed by X-ray photoelectron spectroscopy (XPS). The oxygen reduction reaction in the electrodes exhibited low polarization resistance values at 600 degrees C. The impedance spectra revealed two arcs representing the diffusion of oxygen molecules and the oxygen exchange at the surface of the electrode, with slightly slower rate of change of polarization resistance for the Co-deficient electrodes compared to the stoichiometric sample.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
A. Urusova, A. Bryuzgina, E. Solomakhina, A. Kolchugin, D. Malyshkin, E. Pikalova, E. Filonova
Summary: This study investigates the functional properties of yttrium-doped Ca3Co4O9+3 complex oxides as potential cathode materials for proton-conducting fuel cells. The phase equilibria in the 1/2Y2O3-CaO-1/3Co3O4 system at 900℃ in air has been experimentally observed. The misfit-layered structure of Ca3-kYkCo4O9+3 solid solutions and their chemical compatibility with proton-conducting electrolytes have been established.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Allan J. M. Araujo, Francisco J. A. Loureiro, Laura I. V. Holz, Joao P. F. Grilo, Daniel A. Macedo, Carlos A. Paskocimas, Duncan P. Fagg
Summary: The composite electrode of misfit calcium cobaltite [Ca2CoO3-delta](0.62)[CoO2] (C349) and Ce0.8Pr0.2O2-delta (CPO) shows high levels of electrochemical performance comparable to the standard La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF), providing insight into critical optimization factors for similar SOC electrodes with low ionic transport.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(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)
Review
Chemistry, Physical
Elena Filonova, Elena Pikalova
Summary: The development of low-cost, commercially competitive solid oxide fuel cells with reduced operating temperatures is closely related to the search for new functional materials and technologies to improve the properties of established materials. Efforts are being made to improve air electrodes, which contribute to the degradation of cell performance at reduced temperatures. This review summarizes methods to improve the electrochemical performance of conventional air electrodes and provides background information for further development of electrode modification technologies.
Article
Electrochemistry
Nicholas J. Williams, Conor Osborne, Ieuan D. Seymour, Martin Z. Bazant, Stephen J. Skinner
Summary: Electrochemical impedance spectroscopy (EIS) is a powerful tool for understanding electro-chemical systems, and the distribution of relaxation times (DRT) calculation allows us to identify and analyze relaxation processes occurring in the system. By using Gaussian process (GP) regression, we propose a method to find a unique solution to the ill-posed DRT problem. Our analysis on EIS data from a solid-oxide fuel cell reveals the current-voltage relationship and sheds light on the charge transfer mechanism at the solid-gas interface.
ELECTROCHEMISTRY COMMUNICATIONS
(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
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
Yuqian Zhang, Yuguang Liu
Summary: A comprehensive system combining electrochemical impedance spectroscopy and digital microfluidics has been introduced to easily and sensitively evaluate a patient's immune function. The unique droplet manipulation feature of the microfluidic platform allows for dynamic cell capture assay, improving detection signal by 2.4-fold, demonstrating high sensitivity.
Article
Materials Science, Ceramics
M. Starykevich, A. I. B. Rondao, J. P. F. Grilo, F. M. B. Marques
Summary: MgO partially stabilized zirconia (xMgPSZ) was prepared using a ceramic route starting from pure metal oxides. The focus was on 7.5MgPSZ, which was sintered at 1700 degrees C and cooled at different rates, with or without intermediate dwells at various temperatures and durations. Customized thermal expansion data analysis and powder X-ray diffraction were used to determine the phase content. Novel radar-type charts were created to group the structural and microstructural information. Original benchmarking exercises with literature data provided insights on the thermal performance and property tuning rationale of these materials.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Rafael A. Raimundo, Cleber S. Lourenco, Nailton T. Camara, Thayse R. Silva, Jakeline R. D. Santos, Allan J. M. Araujo, Maite M. S. Silva, Joao F. G. de A. Oliveira, Daniel A. Macedo, Uilame U. Gomes, Marco A. Morales, Marcio M. Soares
Summary: The continuous supply of hydrogen from renewable sources is crucial for human development, and catalysts based on transition metals show promise for the hydrogen and oxygen evolution reactions. In this study, nanocrystalline Co3O4 was synthesized using a proteic sol-gel method and tested as an electrocatalyst for the oxygen evolution reaction. Characterization techniques confirmed the purity of the Co3O4 phase, and scanning electron microscopy revealed a predominantly spherical morphology. The Co3O4 calcined at 400 degrees C exhibited superior electrocatalytic performance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Freud A. Medeiros, Rafael A. Raimundo, Cleber S. Lourenco, Thayse R. Silva, Nailton T. Camara, Allan J. M. Araujo, Marco A. Morales, Daniel A. Macedo, Uilame U. Gomes, Francine A. Costa
Summary: In this study, Mo-Ag nanocomposites were prepared through high energy ball milling and reduction, and their electrochemical performance was evaluated. The results showed that longer milling time led to smaller particle and crystallite sizes, resulting in higher electrocatalytic activity. The Mo-Ag nanocomposites exhibited good electrochemical stability and catalytic activity in the oxygen evolution reaction.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Electrochemistry
Dixcy Xavier, Ayana George, Francisco J. A. Loureiro, Surendran Rajesh
Summary: A novel double molybdate LiSm(MoO4)(2) composition was prepared for potential application as a solid-state Li+-ion conductor in low-loss dielectric ceramics. The material exhibited a tetragonal crystal system with high symmetry and regular MoO42- tetrahedra. The electrochemical properties of the ceramic system were investigated, revealing the coexistence of delocalized (long-range conductivity) and localized (dipole relaxation) phenomena.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Thayse R. Silva, Rafael A. Raimundo, Vinicius D. Silva, Jakeline R. D. Santos, Allan J. M. Araujo, Joao F. G. de A. Oliveira, Lais C. de Lima, Fausthon F. da Silva, Luciena dos S. Ferreira, Daniel A. Macedo
Summary: In this study, a copper cobalt oxide-copper oxide composite electrode was synthesized using flaxseed oil as a polymerizing agent in a sol-gel process combined with hydrothermal method. The composite electrode showed a low overpotential and superior electrocatalytic performance compared to other copper and cobalt based oxides. Short-term stability testing also demonstrated good stability with no observable secondary phase.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Rafael A. Raimundo, Vinicius D. Silva, Luciena S. Ferreira, Francisco J. A. Loureiro, Duncan P. Fagg, Daniel A. Macedo, Uilame U. Gomes, Rodinei M. Gomes, Marcio M. Soares, Marco A. Morales
Summary: This work investigates the magnetic behavior and electrocatalytic properties of CoFe2/CoFe2O4 composite and CoFe2 alloy obtained through proteic sol-gel synthesis. The samples were characterized using microscopy, XRD, Mossbauer spectroscopy, and magnetometry. The results show that both samples exhibit promising magnetic properties and demonstrate good electrochemical stability for the oxygen evolution reaction (OER). These materials based on transition metals, Co and Fe, have great potential in energy storage and conversion systems due to their high performance and low cost.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Rafael A. Raimundo, Jonattan N. Silva, Thayse R. Silva, Allan J. M. Araujo, Joao F. G. A. Oliveira, Lais C. de Lima, Marco A. Morales, Marcio M. Soares, Daniel A. Macedo
Summary: We have synthesized Co3O4-CoO nanocomposite nanoparticles through a two-step green chemistry synthesis method. The synthesized nanocomposite was characterized using various spectroscopic techniques and showed excellent electrochemical activity for oxygen evolution reaction (OER), with an overpotential of 337 mV vs. RHE at 10 mA cm(-2) and Tafel slope of 65 mV dec(-1). This novel route provides a competitive performance for Co3O4-CoO nanocomposite as an electrocatalyst for OER.
Article
Chemistry, Physical
Thayse R. Silva, Rafael A. Raimundo, Vinicius D. Silva, Jakeline Raiane D. Santos, Luciena S. Ferreira, Allan J. M. Araujo, Francisco J. A. Loureiro, Fausthon F. da Silva, Duncan P. Fagg, Daniel A. Macedo
Summary: This research presents a simplified sol-gel method combined with an adapted hydrothermal process to synthesize MnCo2O4 nanoparticles on nickel foam catalyst. The catalyst possesses a large surface area and the absence of binders promotes adhesion of the active material, which boosts the electrocatalytic reactions. The structural, microstructural, and surface properties of the MnCo2O4 electrode are studied through XRD, FESEM, TEM, FTIR, Raman, and XPS analysis. The electrode exhibits excellent electrochemical stability, with an overpotential of 296 mV (at 25 mA cm-2 current density) and a Tafel slope of 82 mV dec � 1, indicating its great potential for future applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Energy & Fuels
Vanessa C. D. Graca, Laura I. V. Holz, Allan J. M. Araujo, Francisco J. A. Loureiro, Duncan P. Fagg
Summary: To address the urgent need for alternative energy transfer methods, Proton Ceramic Membrane Reactors (PCMRs) are being investigated as a clean alternative for energy production and chemical synthesis. This study focuses on using niobium (oxy)nitride with proton ceramic conducting materials as a new composite electrode for PCMRs applications, specifically in the synthesis and fuel use of ammonia. The chemical compatibility and thermal stability of the composite electrode material were assessed, and the electrode mechanism under hydrogenation/de-hydrogenation conditions was studied using electrochemical impedance spectroscopy.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Zinaida Shakel, Francisco J. A. Loureiro, B. M. G. Melo, D. Pukazhselvan, Sergey M. Mikhalev, Aliaksandr L. Shaula, Duncan P. Fagg
Summary: This work provides a detailed analysis of the electrochemical properties of lithium titanium phosphate grain boundary in all-solid-state lithium-ion batteries. The addition of boron significantly improves both the bulk and grain boundary conductivities due to Li-enrichment associated with charge compensation for the boron doping. Detailed analysis using the brick layer model and space charge analysis reveals a lower depletion of Li+ species at the grain boundary of the boron-doped sample, leading to a higher intrinsic grain boundary conductivity and overall conductivity.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Multidisciplinary
Vanessa C. D. Graca, Laura I. V. Holz, Francisco J. A. Loureiro, Glenn C. Mather, Duncan P. Fagg
Summary: In recent years, there has been increasing interest in transition metal oxynitrides due to their attractive properties, such as high conductivity, hardness, and catalytic activity. Among them, niobium oxynitrides have shown great potential for various applications. This study focuses on the impact of ammonolysis conditions on the crystalline phase formation of niobium oxynitride compounds. The results demonstrate that careful control of ammonolysis conditions can tailor the anion composition, cation/anion ratio, and crystallographic structure of the materials.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Rafael A. Raimundo, Thayse R. Silva, Jakeline R. D. Santos, Allan J. M. Araujo, Joao F. G. A. Oliveira, Marco A. Morales, Marcio M. Soares, Daniel A. Macedo
Summary: Nickel oxide nanoparticles with a crystallite size of 4 nm were prepared and used as catalyst for oxygen evolution reaction. The nanocatalyst was characterized and electrochemically evaluated using various techniques such as XRD, FT-IR, RAMAN, UV-VIS, LSV, CV, and EIS. The NiO nanoparticles exhibited promising catalytic properties with low overpotential, high Tafel slope, good charge transfer, high specific activity, and high mass activity.
MRS COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Allan J. M. Araujo, Vanessa C. D. Graca, Rafael A. Raimundo, Antonio C. L. Filho, Daniel A. Macedo, Francisco J. A. Loureiro
Summary: Protonic ceramic cells (PCCs) have the potential to be energy conversion devices operating at lower temperatures. This study introduces Ba2Co9O14 (BCO) as an electrocatalyst for oxygen reactions in PCCs, demonstrating high electrochemical performance and chemical compatibility. The results highlight the importance of surface diffusion in explaining the high-performing behavior of BCO electrodes.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)