Article
Chemistry, Physical
V Cascos, L. Troncoso, A. Larralde, C. Alvarez-Galvan, M. T. Fernandez-Diaz, J. A. Alonso
Summary: In this research, two perovskite materials were prepared and tested as cathode materials for solid-oxide fuel cells, showing high power densities at 850 degrees C. The introduction of highly charged cations like Ir4+ and Ta5+ at the Co sites improved essential properties such as electrical conductivity and polarization resistances.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Monica Chivite Lacaba, Alex Alveal, Jesus Prado-Gonjal, Jose Antonio Alonso, Maria Teresa Fernandez Diaz, Loreto Troncoso, Vanessa Cascos
Summary: Recent studies have explored the stabilization of perovskite phases in the SrCoO3-delta system at room temperature by partially replacing Co atoms with highly charged cations like Ti4+ in SrCo0.95Ti0.05O3-delta. This material demonstrates excellent performance as a cathode for SOFCs at intermediate temperatures (800-850 degrees C). This study aims to further improve the cathode by reducing its Co content and thermal expansion coefficient, resulting in the successful synthesis of SrCo0.50Fe0.45Ti0.05O3-delta perovskite with promising mechanical and electrical properties.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Vanessa Cascos, Maria Teresa Fernandez-Diaz, Jose Antonio Alonso
Summary: Two SrMo1-xAlxO3-delta perovskite materials were synthesized and found to be suitable as anode materials for solid oxide fuel cells. Neutron diffraction investigations revealed the random distribution of Mo and Al cations in the perovskite structure, as well as the presence of oxygen vacancies induced by the introduction of Al at Mo positions. These oxygen vacancies are essential for inducing ionic diffusion and achieving mixed ionic and electronic conduction. The materials also demonstrated excellent compatibility with other components of the fuel cell and exhibited promising performance in real tests.
Article
Chemistry, Physical
Zhe Zhang, Sigeng Chen, Haixia Zhang, Chuangang Yao, Wenwen Zhang, Tingting Qu, Tan Wang, Haocong Wang, Xiaoshi Lang, Kedi Cai
Summary: Novel composite cathode materials prepared through a one-pot strategy showed improved oxygen reduction activity and CO2 tolerance in solid oxide fuel cells, leading to enhanced performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Materials Science, Ceramics
Shammya Afroze, Nico Torino, Md Sumon Reza, Nikdalila Radenahmad, Quentin Cheok, Paul F. Henry, Abul K. Azad
Summary: The study investigated the structural and electrochemical properties of the double perovskite-type oxide PrBaMnMoO6-delta using neutron diffraction and in-situ conductivity measurement. Results revealed a monoclinic crystal structure with minor phases present. Morphological images showed a porous and intertwined microstructure.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Petteri Laine, Marianna Hietaniemi, Juho Valikangas, Toni Kauppinen, Pekka Tynjala, Tao Hu, Shubo Wang, Harishchandra Singh, Lassi Ulla
Summary: The co-precipitation of Ni0.8Co0.1Mn0.1(OH)(2) (NCM811) and Mg-doped (0.25 wt% and 0.5 wt%) NCM811 precursors from concentrated metal sulphate solutions was investigated. The study aimed to understand the impact of magnesium dopant on the co-precipitation step and the performance of Li-ion battery cells using NCM811 as the cathode active material. The results showed that magnesium was fully co-precipitated in the NCM811 precursors and evenly distributed throughout the sample. However, contrary to expectations, magnesium doping did not improve the cyclability of coin cells. Evaluation in pouch cells after 1000 cycles showed a slight improvement in cyclability. Washing effects were observed in lattice parameters, and washing also decreased the capacity retention after 62 cycles for all samples.
DALTON TRANSACTIONS
(2023)
Article
Electrochemistry
Jaewoon Hong, Hohan Bae, Junghyun Park, Sun-Ju Song, Eric D. Wachsman
Summary: This study investigated the changes in cathode parameters before and after infiltration using Jamnik and Maier's MIEC transmission line model. The results showed that infiltrating SSC into the LSCF6428 perovskite electrode resulted in a significant decrease in surface reaction resistance Rp and oxygen ion diffusion resistance Rs. The surface adsorption capacitance CHN0 increased after infiltration, indicating a change from bulk diffusion to surface diffusion. Additionally, the characteristics of surface reactions changed from the reduction reaction of the intermediate stage to the dissociative adsorption reaction of the initial stage.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
A. A. Solovyev, A. V. Shipilova, S. V. Rabotkin, E. A. Smolyanskiy, A. N. Shmakov
Summary: This study investigates the influence of the LSC-GDC composite cathode interlayer on the operation of solid oxide fuel cells. It is shown that the composite layers with 50% GDC content possess the most efficient electrochemical activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Sajad Vafaeenezhad, Miguel A. Morales -Zapata, Amir Reza Hanifi, Miguel A. Laguna-Bercero, Partha Sarkar, Thomas H. Etsell
Summary: The electrochemical performance and stability of infiltrated praseodymium nickelate (PNO) as the cathode for solid oxide fuel cell (SOFC) applications was studied. The results showed that PNO infiltrated into gadolinium-doped ceria (GDC) scaffolds improved the oxygen reduction reaction and transformed into a phase with higher electrical conductivity and thermal stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Cuicui Sun, Yu Shen, Fang Wang, Qian Duan
Summary: Nano-sized hollow porous network composite cathode LSF-BZCY is prepared by electrostatic spinning and applied to anode-supported proton-conducting solid oxide fuel cell. The LSF-BZCY composite cathode exhibits loose texture and porous nanofiber structure, and shows excellent electrochemical performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Crystallography
Crisanto Garcia-Ramos, Vanessa Cascos, Jesus Prado-Gonjal, Rainer Schmidt, Maria Teresa Fernandez-Diaz, Kiril Krezhov, Jose Antonio Alonso
Summary: In this study, the structural analysis of two new perovskite materials BaFe0.875Re0.125O3-delta and BaFe0.75Ta0.25O3-delta was conducted using neutron powder diffraction data. BaFe0.875Re0.125O3-delta exhibits a hexagonal structure, while BaFe0.75Ta0.25O3-delta is cubic. Both materials show oxygen deficiency, and the oxygen atoms in BaFe0.75Ta0.25O3-delta are arranged in flattened disks, which may be related to the dynamic movement of oxygen ions caused by oxygen vacancies.
ZEITSCHRIFT FUR KRISTALLOGRAPHIE-CRYSTALLINE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Hiroshi Mizoguchi, Sang-Won Park, Hideo Hosono
Summary: Transition metals, including platinum group carbonyl complexes, are important catalysts with theoretical and practical value, successfully applied in many organic synthesis reactions and reactions of oxidizing olefin compounds.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Brian C. Sales, William R. Meier, David S. Parker, Li Yin, Jiaqiang Yan, Andrew F. May, Stuart Calder, Adam A. . Aczel, Qiang Zhang, Haoxiang Li, Turgut Yilmaz, Elio Vescovo, Hu Miao, Duncan H. Moseley, Raphael P. Hermann, Michael A. . McGuire
Summary: The kagome metal CoSn has been studied and shown to have flat electronic bands, but electronic instabilities are not realized due to the complete filling of the bands. By replacing Sn with In in CoSn1-xInx, the chemical potential is moved into the flat band region, resulting in the emergence of antiferromagnetic order. This work provides clear evidence that chemically manipulating flat bands in bulk crystals can control correlated ground states.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Ceramics
K. H. Tan, H. A. Rahman, M. S. Azami, U. A. Yusop, N. A. Baharuddin, M. I. Nor Ma'arof
Summary: This paper presents the development and characterization of a new composite cathode material BSCF-SDCC for low-temperature solid oxide fuel cell cathode application. The BSCF-SDCC composite cathode demonstrated excellent microstructural, chemical, and electrochemical properties. The composite cathode exhibited low polarization resistance and high conductivity, making it a promising candidate for low-temperature solid oxide fuel cell cathodes.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
E. Pikalova, N. Bogdanovich, A. Kolchugin, K. Shubin, L. Ermakova, N. Eremeev, A. Farlenkov, A. Khrustov, E. Filonova, V. Sadykov
Summary: In this study, bilayer composite electrodes based on LNF electronic conductor and Bi2O3-based electrolytes doped with Er and Y have been developed and their performance has been investigated under different electrolyte content and sintering conditions. The optimized electrodes showed polarization resistance in the range of 0.65-1.09 Omega cm(2) at 600 degrees C and 0.10-0.12 Omega cm(2) at 700 degrees C, with significantly improved performance compared to standard platinum cathodes in single cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Liang Lu, Chunwen Sun, Jian Hao, Zelin Wang, Sergio F. Mayer, Maria Teresa Fernandez-Diaz, Jose Antonio Alonso, Bingsuo Zou
Summary: This work studies magnesium-doped Na3Zr2Si2PO12 as a solid electrolyte for solid-state Na-CO2 batteries, and utilizes a composite electrolyte composed of highly conductive Na3.2Zr1.9Mg0.1Si2PO12 and high processability PVDF-HFP to assemble a solid-state Na-CO2 battery, demonstrating promising performance.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Joao E. F. S. Rodrigues, Javier Gainza, Federico Serrano-Sanchez, Romualdo S. Silva Jr, Catherine Dejoie, Norbert M. Nemes, Oscar J. Dura, Jose L. Martinez, Jose Antonio Alonso
Summary: In this study, Gd-filled skutterudite GdxCo4Sb12 was prepared under high pressure and moderate temperature. The structural characterization revealed a filling fraction of x = 0.033(2) and an average bond length of 3.3499(3) angstrom. The lattice thermal expansion and Debye temperature were determined, showing that the application of the harmonic Debye theory underestimates the Debye temperature in skutterudites. The presence of Gd atom contributed to an ultra-low thermal conductivity and high thermoelectric efficiency.
Article
Materials Science, Multidisciplinary
J. E. Rodrigues, A. D. Rosa, J. Lopez-Sanchez, E. Sebastiani-Tofano, N. M. Nemes, J. L. Martinez, J. A. Alonso, O. Mathon
Summary: Understanding the electronic and structural changes in nickelates with a perovskite structure is crucial for their application as industrial devices. This study focuses on PrNiO3 and investigates the structural changes at a local level using X-ray absorption spectroscopy. The results reveal the presence of different phases and the coupling behavior between spin configuration and phonons. This approach provides new opportunities for similar studies in related materials.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Crystallography
Javier Gainza, Federico Serrano-Sanchez, Joao E. F. S. Rodrigues, Oscar J. J. Dura, Brenda Fragoso, Mateus M. M. Ferrer, Norbert M. M. Nemes, Jose L. Martinez, Maria T. Fernandez-Diaz, Jose A. Alonso
Summary: Among chalcogenide thermoelectric materials, SnTe is a promising alternative to toxic PbTe for intermediate temperature applications. Pure polycrystalline SnTe was obtained by arc melting and its structural evolution was studied using temperature-dependent neutron powder diffraction (NPD) from room temperature up to 973 K. The sample exhibited a cubic crystal structure (space group Fm-3m) with pronounced displacement parameters for Te atoms. The structural analysis allowed the determination of Debye model parameters and provided insights into the Sn-Te chemical bonds. SEM images revealed nanostructuration in layers below 30 nm, contributing to a reduced thermal conductivity of 2.5 W/m center dot K at 800 K. The SPS treatment appeared to reduce Sn vacancies, resulting in decreased carrier density, increased Seebeck coefficient (up to 60 mu V K-1 at 700 K), and nearly doubled weighted mobility compared to the as-grown sample.
Article
Crystallography
Joao Elias F. S. Rodrigues, Javier Gainza, Federico Serrano-Sanchez, Norbert M. Nemes, Oscar J. Dura, Jose Luis Martinez, Jose Antonio Alonso
Summary: A novel Eu-filled skutterudite has been synthesized under high-pressure conditions, and its structure was studied by high-resolution synchrotron X-ray diffraction. The thermal conductivity of this alloy was measured to be 0.82 W m(-1) K-1, lower than that of other filled skutterudites.
ZEITSCHRIFT FUR KRISTALLOGRAPHIE-CRYSTALLINE MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Fatima Zohra Bouasla, Nabil Mahamdioua, Jose A. Alonso, Jose L. Martinez, Faiza Meriche, Cabir Terzioglu, Sevgi Polat Altintas
Summary: The orthochromites La0.7RE0.1Ca0.2CrO3 (RE = Nd, Sm, and Eu) with orthorhombic perovskite structure were studied for their structural, microstructural, optical, and magnetic properties. The results showed different bandgap energy values for Nd, Sm, and Eu doped samples, explaining the creation of localized states. The investigation also revealed the refractive index, Urbach energy, optical conductivity, and magnetic behavior of the samples.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Radjia Belguet, Nabil Mahamdioua, Faiza Meriche, Jose A. Alonso, Jose L. Martinez, Fatih Denbri, Sevgi Polat-Altintas, Cabir Terzioglu
Summary: Hole-doping double-layered manganites with the formula La1:0Gd(0.2-x)PbxCa1.2Sr0.6Mn2O7 (x = 0, 0.1, and 0.2) were prepared and characterized. The samples exhibited a tetragonal structure with an I4/mmm space group. Micrographs obtained using a scanning electron microscope showed a granular and porous structure with spherical grains. Fourier-transform infrared (FTIR) analysis confirmed the presence of characteristic vibrational bands. Electrical resistivity measurements revealed a decrease in resistivity with increasing Pb concentrations. The samples exhibited magnetic phase changes and displayed potential as temperature and magnetic sensors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Multidisciplinary Sciences
Dmitry Galyamin, Jorge Torrero, Isabel Rodriguez, Manuel J. Kolb, Pilar Ferrer, Laura Pascual, Mohamed Abdel Salam, Diego Gianolio, Veronica Celorrio, Mohamed Mokhtar, Daniel Garcia Sanchez, Aldo Saul Gago, Kaspar Andreas Friedrich, Miguel A. Pena, Jose Antonio Alonso, Federico Calle-Vallejo, Maria Retuerto, Sergio Rojas
Summary: The study finds that low-ruthenium-content pyrochlores (R2MnRuO7, R = Y, Tb, and Dy) exhibit high activity and durability for the oxygen evolution reaction (OER) in acidic media. Among them, Y2MnRuO7 is the most stable catalyst, showing a voltage of 1.5 V at 10 mA cm(-2) for 40 h, or 5000 cycles up to 1.7 V. Experimental and computational results indicate that the excellent performance is attributed to the Ru sites embedded in RuMnOx surface layers. A water electrolyzer with Y2MnRuO7 and only 0.2 mgRu cm(-2) achieves a current density of 1 A cm(-2) at 1.75 V, remaining stable at 200 mA cm(-2) for over 24 h. These findings suggest further investigation on Ru catalysts with the goal of enhancing OER performance through a partial replacement of Ru with inexpensive cations. Ru-pyrochlores can serve as alternative anodes of PEM water electrolyzers, and their high performance is attributed to the Ru sites embedded in RuMnOx surface layers. The durability of a water electrolyzer with Y2MnRuO7 and only 0.2 mgRu cm(-2) has been successfully demonstrated.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Jorge Torrero, Tobias Morawietz, Daniel Garcia Sanchez, Dmitry Galyamin, Maria Retuerto, Vlad Martin-Diaconescu, Sergio Rojas, Jose Antonio Alonso, Aldo Saul Gago, Kaspar Andreas Friedrich
Summary: In this study, an anode with reduced iridium loading (0.2 mg) compared to commercial proton exchange membrane water electrolysis (PEMWE) (2-3 mg) was developed, demonstrating high performance and stability for over 1000 hours. An advanced catalyst based on an Ir mixed oxide (Sr2CaIrO6) was used, which has an unconventional structure that contributes to the reduction of iridium in the catalyst layer. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) showed the reconfiguration of the ionomer in the catalyst layer, resulting in almost full coverage of the catalytic layer with ionomers.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Crisanto A. Garcia-Ramos, Kiril Krezhov, Maria T. Fernandez-Diaz, Jose A. Alonso
Summary: By using X-ray and neutron powder diffraction, magnetization measurements, and Fe-57 Mossbauer spectroscopy, the structural and magnetic properties of Sr1-xBaxFeO2F were investigated. The results showed the random occupancy of Sr and Ba atoms at the A-cation site and the statistical distribution of O and F at the anionic sublattice. The magnetic structure was determined to be a G-type antiferromagnetic arrangement with Fe3+ moments oriented along the c axis.
Article
Chemistry, Multidisciplinary
Carmen Abia, Carlos A. Lopez, Javier Gainza, Joao Elias F. S. Rodrigues, Brenda Fragoso, Mateus M. Ferrer, Norbert M. Nemes, Oscar J. Dura, Jose Luis Martinez, Maria Teresa Fernandez-Diaz, Jose Antonio Alonso
Summary: Rubidium di-tin pentabromide (RbSn2Br5) is a lead-free alternative material with high crystallinity that can be easily synthesized using a ball milling procedure. It has the potential to be used as a photovoltaic and optoelectronic material due to its improved stability and tolerance to ambient conditions. Experimental studies have shown that it has high electronic conductivity and Seebeck coefficient, as well as low thermal conductivity.
Article
Chemistry, Physical
Kaiyong Tuo, Chunwen Sun, C. A. Lopez, Maria Teresa Fernandez-Diaz, Jose Antonio Alonso
Summary: We report a new mixed-metal halide superionic conductor Li3-xY1-xHfxCl6 (0≤x<1) with high ionic conductivity up to 1.49 mS cm(-1) at room temperature. By using experimental characterization techniques and calculations, we investigate the influence of aliovalent substitution of Hf for Y on the local structural environment and lithium-ion transport in Li3YCl6. The presence of prevalent cation site disorder and defect structure as well as the synthetically optimized (Y/Hf)Cl-6 framework strongly enhances the transport properties.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Carmen Abia, Carlos A. Lopez, Javier Gainza, Joao Elias F. S. Rodrigues, Maria T. Fernandez-Diaz, Eva Cespedes, Jose Luis Martinez, Jose Antonio Alonso
Summary: The search for lead-free materials for optoelectronic applications is a current research focus in the field of environment-friendly energy transition. In this study, we investigated the substitution of toxic Pb2+ with Cu2+ in all-inorganic CsPbBr3 perovskite, and explored the CsCuBr3 halide with little previous research. A mechanically-synthesized CsCuBr3 specimen was obtained and characterized by calorimetric and structural analysis techniques. The results revealed a structural phase transition and the presence of magnetic coupling between Cu2+ spins.
Article
Chemistry, Physical
Javier Gainza, Orlando N. Guinazu, Eva Cespedes, Horacio Falcon, Jose Luis Martinez, Jose Antonio Alonso
Summary: In this study, MnIn2S4 polycrystalline samples with tunable degree of inversion were prepared using a rapid high-pressure synthetic method. The crystal structure refinement showed a positive correlation between the inversion degree and properties such as band gap and magnetic behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Nestor E. Massa, Leire del Campo, Vinh Ta Phuoc, Paula Kayser, Jose Antonio Alonso
Summary: This study investigates the zone center terahertz excitations of non-Jahn Teller distorted perovskites LaFeO3, PrFeO3, ErFeO3, and LuFeO3 under external magnetic fields. The results show that the low-energy excitations strongly depend on the size of the lanthanide ions and are affected by minute lattice displacements. This study provides insights into the mechanism and manipulation of magnetic states using phonons in these perovskites.
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)
