Review
Materials Science, Ceramics
Teruhisa Horita
Summary: This paper discusses the crucial challenge of prolonged durability in Solid Oxide Fuel Cell systems, focusing on volatile chromium species poisoning. Through chemical reactions and electrochemical reduction, the interactions between perovskite oxide cathode surface and volatile Cr species are studied. The paper proposes solutions and analyzes recovery mechanisms, providing insights for new material combinations in next-generation SOFCs.
CERAMICS INTERNATIONAL
(2021)
Article
Electrochemistry
Lingfeng Zhou, Harry O. Finklea, Wenyuan Li, Wangying Shi, Michael P. Brady, Tim B. Eldred, Roberto Garcia, Hanchen Tian, Liang Ma, Yi Wang, Zhipeng Zeng, Xingbo Liu
Summary: This study analyzed the potential of Al2O3-forming austenitic (AFA) stainless steels as replacements for balance of plant (BoP) components in solid oxide fuel cells (SOFCs). The chromium (Cr) poisoning in anode supported cells (ASCs) coupled with various alloys was examined using the distribution of relaxation times (DRT). The deterioration of ASC performance was mainly attributed to increased polarization resistances caused by chemisorption of oxygen on the cathode and oxygen diffusion and reaction. ASCs coupled with AFA alloys showed superior performance due to the formation of a continuous alumina layer, which reduced the evaporated gaseous Cr species and alleviated Cr poisoning on the cathode region.
ELECTROCHIMICA ACTA
(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
D. A. Osinkin
Summary: This study presents the results of tests on different types of electrochemical cells, focusing on the impedance spectra analysis of fuel cells using the distribution of relaxation times (DRT) technique. By comparing the data obtained with symmetrical cells and using simple oxides with high electrochemical activity for electrode impregnation, the polarization resistance of the cathode and anode of the fuel cell can be determined separately, along with the reasons limiting the power of the cells. It was found that gas diffusion in the pores of the anode primarily limits the performance of high-performance fuel cells.
JOURNAL OF POWER SOURCES
(2022)
Review
Chemistry, Physical
Daniel A. Kurtz, Bryan M. Hunter
Summary: Transition metal oxides/oxyhydroxides have generated much interest as electrocatalysts for water splitting due to their ability to cycle between different oxidation states. A thermodynamic model is proposed to explain the trends in first-row transition metal catalysts for oxygen evolution half-reaction. The model can provide quantitative predictions based on experimental data.
Article
Chemistry, Physical
Lingfeng Zhou, Zhipeng Zeng, Michael P. Brady, Donovan N. Leonard, Harry M. Meyer III, Yukinori Yamamoto, Wenyuan Li, Greg Collins, Xingbo Liu
Summary: The study showed that the chromium evaporation rates of AFA alloys were 5 to 35 times lower than that of Cr2O3-forming alloys, and silicon contamination in the quartz tube was observed during testing.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Hafiz Ahmad Ishfaq, Muhammad Zubair Khan, Yogita Manikrao Shirke, Sanaullah Qamar, Amjad Hussain, Muhammad Taqi Mehran, Rak-Hyun Song, Mohsin Saleem
Summary: Here, we report a highly conductive, robust, and innovative Gd and Pr multi-doped ceria (GPDC) coating to enhance the ORR kinetics and stability against Cr poisoning of the state-of-the-art LSCF cathode. The GPDC coating significantly improves the ORR kinetics by improving the surface of the LSCF cathode and shows a two-fold increase in electrochemical performance compared to the bare LSCF cathode. It also exhibits outstanding stability in an accelerated Cr poisoning test, attributed to the alleviation of SrCrO4 formation. Both relaxation time-based analysis and experimental results confirm that the GPDC coating enhances the ORR activity and Cr tolerance of the LSCF cathode.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
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
Nanoscience & Nanotechnology
Bartosz Kamecki, Grzegorz Cempura, Piotr Jasinski, Sea-Fue Wang, Sebastian Molin
Summary: Improvements in solid oxide fuel cell (SOFC) oxygen electrode design can be achieved through microstructure miniaturization and the implementation of nanomaterials. This study successfully improved the electrochemical performance of an LSCF cathode by modifying the LSC nanocrystalline interlayer, resulting in enhanced oxygen surface exchange kinetics and reduced polarization resistances. Aging tests also showed promising results for the developed electrode.
ACS APPLIED MATERIALS & INTERFACES
(2022)
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
Electrochemistry
Nina Schrodl, Andreas Egger, Judith Lammer, Ferdinand Hofer, Werner Sitte
Summary: Long-term stability tests on Pr2NiO4+delta air electrodes were conducted at 800 degrees C, revealing good stability under dry conditions but decreased performance in a humid environment with chromium introduction. Post-test analyses showed a correlation between Cr-deposition extent and electrode degradation, supporting enhanced resilience of Pr2NiO4+delta against Cr-poisoning in SOEC mode.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Zhongqiu Li, Bo Guan, Fang Xia, Jiuyuan Nie, Wenyuan Li, Liang Ma, Wei Li, Lingfeng Zhou, Yi Wang, Hanchen Tian, Jian Luo, Yan Chen, Matthew Frost, Ke An, Xingbo Liu
Summary: A new series of HEPs are investigated as cathode materials for SOFCs, achieving both chromium tolerance and high performance. The A-site elements have a significant influence on overall performance, and using the three most active elements simultaneously leads to the best candidate. Excellent Cr tolerance has been observed, with degradation of only 0.25%/kh during operation.
ACS APPLIED MATERIALS & INTERFACES
(2022)
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
Green & Sustainable Science & Technology
Priyakant Pushkar, Arvind Kumar Mungray
Summary: The study showed that sediment height, anode size, and chamber volume can impact the diffusion impedance and power density in benthic microbial fuel cells (BMFCs), suggesting practical implications for improving energy generation efficiency. Microbial consortia were found to play a crucial role in mass transport phenomena and electrochemical diffusion in BMFCs.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
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
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)