Article
Chemistry, Physical
Andrei I. Klyndyuk, Michal Mosialek, Dmitry S. Kharitonov, Ekaterina A. Chizhova, Malgorzata Zimowska, Robert P. Socha, Anna Komenda
Summary: Single- and double-doped YBa(Fe,Co,Cu)(2)O5+delta layered perovskites were prepared by solid state reaction method. The substitution of Co by Fe or/and Cu significantly improved thermal expansion properties, and the synthesized materials showed promising performance as cathode materials at intermediate temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Andrei Klyndyuk, Dzmitry S. Kharytonau, Michal Mosialek, Ekaterina A. Chizhova, Anna Komenda, Robert P. Socha, Malgorzata Zimowska
Summary: Double-doped NdBa(Fe, Co, Cu) (2)O5+delta layered perovskites were prepared and examined in this study. The physicochemical analysis showed that these materials have good electrical conductivity and linear thermal expansion coefficient, making them suitable as cathode materials for solid-oxide fuel cells.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Gjorgji Nusev, Bertrand Morel, Julie Mougin, Dani Juricic, Pavle Boskoski
Summary: This study investigates the internal condition of a 6-cell solid oxide fuel cell stack during a 3600-hour test with short fuel starvation intervals, analyzing the relationship between condition changes, impedance spectra, and equivalent circuit model parameters. Features indicating reduced fuel supply are identified.
JOURNAL OF POWER SOURCES
(2021)
Article
Electrochemistry
Caterina Sanna, Paola Costamagna, Peter Holtappels
Summary: Several core-shell nanofiber electrodes are prepared through electrospinning and tested for application as intermediate-temperature solid oxide fuel cell (IT-SOFC) cathodes. The materials investigated are La0.6Sr0.4MnO3 (LSM), La0.6Sr0.4Cu0.1Mn0.9O3-delta (LSCuM_1), and La0.6Sr0.4Cu0.2Mn0.8O3-delta (LSCuM_2) perovskites, used at the shell side of the nanofibers. Ce0.9Gd0.1O1.95 (GDC10) fluorite is used as the core material. The electrochemical characterization of the core-shell nanofiber electrodes is performed through electrochemical impedance spectroscopy (EIS). The polarization resistance of the core-shell nanofiber electrodes is reported, and the most promising shell perovskite is identified through SEM characterization.
Article
Chemistry, Physical
Zewei Lyu, Hangyue Li, Minfang Han, Zaihong Sun, Kaihua Sun
Summary: The commercial application of solid oxide fuel cells (SOFCs) is facing the challenge of limited lifetime and durability. This study establishes a quantitative evaluation method based on dynamic electrochemical impedance spectroscopy (DEIS) to understand the performance degradation mechanisms. The contributions of ohmic resistance and different polarization resistances are determined separately, and post-test characterization on electrode microstructures is provided to support the impedance-based analysis results.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
A. P. Khandale, S. S. Bhoga
Summary: The dispersion of nanocrystalline Ce0.9Gd0.1O2-delta in superfine Sm1.5Sr0.5NiO4+delta is achieved using a modified precipitation technique, inhibiting grain growth and providing morphological stability. The concentration-dependent behaviors of ionic conductivity, surface exchange rate, and electrode polarization resistance are comprehended using a percolation model. Improvement in electrochemical performance is correlated to the nano crystallite size of Ce0.9Gd0.1O2-delta.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Huilin Zhang, Ting Chen, Zuzhi Huang, Guangzhou Hu, Juan Zhou, Shaorong Wang
Summary: A cathode-supported SOFC with improved electrochemical performance was successfully fabricated in this study, and the mechanism of electrochemical reaction was investigated using the DRT method. The results showed that the impregnated LSC particles increased the triple phase-boundaries and improved the oxygen reduction reaction rate.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Ayesha Akter, John Pietras, Srikanth Gopalan
Summary: This paper investigates the application of a 50 mol% neodymium doped ceria (NDC50) barrier layer between the oxygen electrode and electrolyte. Compared to the GDC10 barrier layer, the NDC50 barrier layer exhibits lower polarization resistance and improved ionic conductivity across a wide range of temperature and oxygen partial pressure.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Aroosa Javed, Daniel Sikstrom, Venkataraman Thangadurai
Summary: Perovskite-type structure oxides with Nd1-xSrxCo0.8Fe0.2O3-delta (0 <= x <= 0.85) (NSCF) composition were synthesized to investigate the effect of Sr-doping on crystal structure and electrochemical performance. The NSCF compositions showed a transition from semiconducting to metallic behavior with increasing temperature. The electrochemical performance of NSCF electrodes with LSGM electrolyte was studied, and the composite electrode of Nd0.3Sr0.7Co0.8Fe0.2O3-delta - LSGM showed the best performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
K. Cwieka, A. Lysik, T. Wejrzanowski, T. Norby, W. Xing
Summary: This paper demonstrates the influence of modifications in microstructure and chemical composition on the electrochemical behavior of cathodes for molten carbonate fuel cells (MCFCs). By designing new three-layer cathode structures, combining porous silver, nickel oxide, and nickel foam layers, it is possible to enhance cell performance, decrease internal resistance, and improve charge transfer and mass transport efficiency.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Di Yang, Gang Chen, Hailiang Liu, Linlin Zhang, Yang He, Xuebai Zhang, Kai Yu, Shujiang Geng, Ying Li
Summary: The study found that the NCAL cathode has better electrochemical performance at 550 degrees C, especially when used in a composite with GDC with a mass ratio of 8/2. High temperature sintering can decrease the performance of the composite cathode, while the high oxygen vacancy concentration at the NCAL-Li2CO3/GDC interfaces enhances oxygen ion conductivity and lowers the activation energy for reactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Juntao Gao, Yingying Liu, Tian Xia, Liping Sun, Hui Zhao, Bo Wei, Qiang Li
Summary: In this study, Sr0.5Bi0.4Ca0.1FeO3-delta (SBCF) and Sr0.5Bi0.5FeO3-delta (SBF) oxides were investigated as oxygen electrodes for solid oxide fuel cells (SOFCs). SBCF showed lower polarization resistance and better chemical stability, suggesting its potential as an electrode for SOFCs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Energy & Fuels
Masashi Kishimoto, Shohei Kishida, Haewon Seo, Hiroshi Iwai, Hideo Yoshida
Summary: A novel numerical methodology is proposed for predicting the electrochemical characteristics of a practical-size solid oxide fuel cell (SOFC). The method involves dividing the cell into independent one-dimensional unit cells and evaluating the cell's performance based on the performance of local unit cells. By constructing a database of unit cell performance and using theoretical expressions, the method accurately predicts the macroscopic characteristics of the entire cell.
Article
Green & Sustainable Science & Technology
Wan Nor Anasuhah Wan Yusoff, Nur Nadhihah Mohd Tahir, Nurul Akidah Baharuddin, Mahendra Rao Somalu, Andanastuti Muchtar, Lai Jian Wei
Summary: The solid oxide fuel cell (SOFC) is a highly anticipated green and sustainable energy technology. This study successfully produced cathode material with a desired microstructure by improving the oxidation-reduction process and utilizing specific processing techniques. The study also highlights the importance of processing techniques in optimizing electrochemical performances.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Materials Science, Ceramics
Tian Song, Tian Xia, Liping Sun, Qiang Li, Hui Zhao
Summary: Solid oxide fuel cells (SOFCs) have been widely applied in energy conversion field due to their high efficiency, low cost and pollution, and flexible fuel choice. However, the sluggish oxygen reduction reaction (ORR) rate is a challenge for the development of SOFCs. In this study, a series of Ruddlesden-Popper-type Sr2.7Pr0.3Fe2-xCuxO7-delta (SPFCx) oxides were synthesized and evaluated as potential SOFCs cathodes. Among them, Sr2.7Pr0.3Fe1.9Cu0.1O7-delta (SPFC10) showed the best electrocatalysis performance and improved oxygen reduction kinetics. Cu-doping was found to enhance oxygen transport kinetics, increase oxygen vacancy concentration, and improve electrocatalysis performance.
CERAMICS INTERNATIONAL
(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)