Article
Chemistry, Physical
Jisu Shin, Sungeun Yang, Ho-Il Ji, Sangbaek Park, Hyoungchul Kim, Ji-Won Son, Jong-Ho Lee, Byung-Kook Kim, Jongsup Hong, Kyung Joong Yoon
Summary: The study demonstrates high-performance SOFCs with an LNO-based cathode fabricated by a low-temperature processing route that suppresses harmful chemical reactions. The addition of sintering additives enhances the bonding between the cathode and electrolyte at temperatures significantly lower than typical processing temperatures, simplifying the cell structure and manufacturing process. These results highlight the importance of carefully engineering processing parameters to fully exploit the superior intrinsic properties of the LNO-based cathode.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Tiezhu Ma, Tian Xia, Qiang Li, Lihua Huo, Hui Zhao
Summary: In this study, the Ruddlesden-Popper Sr2.9La0.1Fe1.9Ni0.1O7_(d) (SLFN) oxide is evaluated as an efficient oxygen electrode material for solid oxide fuel cells (SOFCs) with potential applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Daoming Huan, Lu Zhang, Kang Zhu, Xinyu Li, Nai Shi, Yi Yang, Changrong Xia, Yun Xie, Ranran Peng
Summary: This study demonstrates the improved oxygen reduction reaction kinetics of (SrEu2)(0.9)Fe2O7-δ ((SE)(0.9)F) by introducing a 10% A-site deficiency, leading to sufficient oxygen vacancy concentration and enhanced electrical conductivity. The new catalyst also shows promoted catalytic activity towards the ORR at intermediate temperatures, with excellent CO2 resistivity, highlighting the integral role of Ruddlesden-Popper oxides in developing efficient and stable cobalt-free cathodes for IT-SOFCs.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Inorganic & Nuclear
Daniel Munoz Gil, Khalid Boulahya, Maria Santamaria Santoyo, M. Teresa Azcondo, Ulises Amador
Summary: The study investigates the effects of iron and cobalt content on various properties of Eu2SrCoxFe2-xO7-delta materials, finding that the low cobalt content Eu2SrCo0.50Fe1.50O7-delta exhibits higher total conductivity and lower area-specific resistance, making it a suitable candidate as a cathode material for solid oxide fuel cells.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Longsheng Peng, Qiang Li, Liping Sun, Hui Zhao
Summary: The Cu-doping strategy significantly improves the electrocatalytic activity of SFC10 cathode for ORR, with enhanced electrical conductivity and electrochemical performance. Through favorable oxygen surface exchange capabilities and larger oxygen vacancy concentrations, SFC10 exhibits a peak power density comparable to cobalt-based electrodes at elevated temperatures, making it a promising cathode material for SOFCs.
Article
Chemistry, Physical
T. Ghorbani-Moghadam, A. Kompany, M. Golmohammad
Summary: The research showed that Fe doping in La0.7Sr1.3CoO4 can enhance the electrochemical performance of cathodic symmetrical cells, reducing the area-specific polarization resistance. These cathode materials hold promise for use in intermediate solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Aleksandr Bamburov, Yevgeniy Naumovich, Dmitry D. Khalyavin, Aleksey A. Yaremchenko
Summary: This study investigated the possibility of introducing cation vacancies into the Ln sublattice of perovskite-related Ruddlesden-Popper nickelates. The results showed that the concentration of cation vacancies in the A sublattice of the Ruddlesden-Popper structure is very low, and the introduction of vacancies enhances the diffusivity of A-site cations and destabilizes the structure. However, the nominal cation deficiency has no effect on the electrical conductivity and oxygen permeability of the ceramics.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Yihui Liu, Zhuofei Pan, Xiyong Chen, Chao Wang, Haizhao Li
Summary: A new type of Ruddlesden-Popper Pr1.2Sr0.8Ni1-xMoxO4+delta (PSNMO) cathode with different Mo doping levels was prepared using the sol-gel method. The maximum conductivity of Pr1.2Sr0.8NiO4+delta cathodes was achieved and then decreased with the continuous increase of Mo amount in all the Mo-doped cathodes. The Pr1.2Sr0.8Ni0.950Mo0.050O4+delta cathode showed the lowest polarization resistance among the PSNMO cathodes at 750 degrees C. Mo-doping improved the oxygen surface exchange properties of PSNMO cathodes, mainly due to the co-interaction of oxygen vacancy and interstitial oxygen in PSNO cathodes after Mo-doping.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Jiyang Ma, Yuxin Pan, Yakun Wang, Yu Chen
Summary: This study presents a Sr and Ni dual doped Ruddlesden-Popper perovskite oxide, La1.6Sr0.4Cu0.6Ni0.4O4+delta (LSCN), with rich oxygen vacancies and good chemical/thermal compatibility with the electrolyte. The LSCN cathode showed promising electrochemical performance with peak power density of 1020 mWcm(-2) and excellent stability at 750 degrees C over a period of 100 hours, making it a potential cathode material for protonic ceramic fuel cells.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Seongmin Park, Hyunsu Han, Junil Choi, Seungjun Lee, Minseon Park, Won Bae Kim
Summary: A new ceramic-based catalyst with exsolved CoFe nanoparticles anchored on a Ruddlesden-Popper structure has been successfully synthesized and analyzed for its applicability as an anode in solid oxide fuel cells. The catalyst showed good electrochemical performance attributed to the presence of oxygen vacancies, low synthesis temperature, and additional chemisorption and activation sites provided by the exsolved CoFe nanoparticles. This material holds promise as a potential anode material for SOFCs.
Article
Chemistry, Physical
Yihan Ling, Lu Liu, Shijie Zhou, Yang Yang, Hui Zhu, Hui Chen, M. H. Paydar, Shaorong Wang
Summary: LSFN is evaluated as a potential electrode material for symmetrical solid oxide fuel cells, and when mixed with GDC, the performance of the fuel cells is improved with increased power density and decreased polarization resistance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Ceramics
Tiezhu Ma, Tian Xia, Qiang Li, Liping Sun, Lihua Huo, Hui Zhao
Summary: By synthesizing and evaluating Ruddlesden-Popper oxides as potential cathode materials for SOFC, it was found that SLF10 exhibits high oxygen vacancy concentration and excellent electrocatalytic performance, leading to a higher maximum power density for the fuel cell.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Energy & Fuels
Jiaming Yang, Junkai Wang, Lei Fu, Ke Wu, Zhengrong Liu, Kai Wu, Jun Zhou
Summary: The fiber-structured YCF-GDC composite oxide synthesized through modified electrospinning technique shows promising features as a highly active cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs) with relatively low resistance at 550 degrees C, offering potential for future applications.
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, Multidisciplinary
Junwoo Lee, Gyumin Jang, Sunihl Ma, Chan Uk Lee, Jaehyun Son, Wooyong Jeong, Jooho Moon
Summary: This study introduces a simple and universal bifacial stamping method for fabricating highly oriented and phase-controlled quasi-2D perovskite solar cells. By stamping 3D perovskite films atop 2D films, reverse-graded perovskite films with a well-crystallized structure are obtained. The experimental results show that this method enables the production of high-performance and stable quasi-2D perovskite solar cells.
Article
Multidisciplinary Sciences
Masatomo Yashima, Takafumi Tsujiguchi, Yuichi Sakuda, Yuta Yasui, Yu Zhou, Kotaro Fujii, Shuki Torii, Takashi Kamiyama, Stephen J. Skinner
Summary: Oxide-ion conductors are crucial in various applications for clean energy. The high oxide-ion conductivity of the hexagonal perovskite-related oxide Ba7Nb3.9Mo1.1O20.05, attributed to interstitialcy diffusion and low activation energy for oxide-ion conductivity, is reported by the authors.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Zonghao Shen, Ji Wu, Matthew W. Shorvon, Guillaume Cazaux, Stephen C. Parker, Stephen J. Skinner
Summary: A novel black cerium niobium oxynitride material with a perovskite crystal structure was synthesized through thermal ammonolysis, showing complex multistage redox processes at elevated temperatures in air. The incorporation of nitrogen into the oxygen sublattice led to a significant decrease in band gap and structural stability, as confirmed by experimental and theoretical studies.
CHEMISTRY OF MATERIALS
(2021)
Review
Energy & Fuels
John Irvine, Jennifer L. M. Rupp, Gang Liu, Xiaoxiang Xu, Sossina Haile, Xin Qian, Alem Snyder, Robert Freer, Dursun Ekren, Stephen Skinner, Ozden Celikbilek, Shigang Chen, Shanwen Tao, Tae Ho Shin, Ryan O'Hayre, Jake Huang, Chuancheng Duan, Meagan Papac, Shuangbin Li, Veronica Celorrio, Andrea Russell, Brian Hayden, Hugo Nolan, Xiubing Huang, Ge Wang, Ian Metcalfe, Dragos Neagu, Susana Garcia Martin
Summary: Inorganic perovskites exhibit important physical properties and play a significant role in energy materials, finding applications in various fields such as batteries, fuel cells, photocatalysts, catalysis, thermoelectrics, and solar thermal. These materials often have highly competitive performance and tend to dominate research in energy materials.
JOURNAL OF PHYSICS-ENERGY
(2021)
Article
Chemistry, Physical
Zijie Sha, Eleonora Cali, Zonghao Shen, Ecaterina Ware, Gwilherm Kerherve, Stephen J. Skinner
Summary: MIEC perovskite oxides play a significant role in carbon-neutral clean energy conversion and storage technologies, showing promising potential in various applications. Research findings demonstrate that oxygen mass transport properties are significantly improved under a humid reducing water vapor environment, with detailed exploration of the underlying mechanisms.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Hany Fathy Heiba, Jay C. Bullen, Andreas Kafizas, Camille Petit, Stephen J. Skinner, Dominik Weiss
Summary: The study critically examined the factors affecting the experimental determination of reaction rates for the photocatalytic oxidation of arsenite (As(III)) using TiO2 under UV radiation. The key findings include the importance of proper handling of adsorption and depletion of As(III), the potential impact of the solution composition and the light source on the oxidation rates, and the low quantum yield of the As(III) oxidation reaction.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jia Guo, Rongsheng Cai, Eleonora Cali, George E. Wilson, Gwilherm Kerherve, Sarah J. Haigh, Stephen J. Skinner
Summary: A-site deficient double perovskite oxides are subjected to low-temperature reduction, resulting in the exsolution of nanoparticles. These nanoparticles exhibit diffusion-limited growth and consist of both nickel and ruthenium, making them rare bimetallic nanoparticles formed at such low temperatures. The reduced electrode layers show a significant decrease in area-specific resistance, indicating promising prospects for catalytic applications.
Article
Chemistry, Physical
Katherine Develos-Bagarinao, Ozden Celikbilek, Riyan A. Budiman, Gwilherm Kerherve, Sarah Fearn, Stephen J. Skinner, Haruo Kishimoto
Summary: Innovative electrode structures are actively researched for solid oxide cells (SOCs) to achieve superior performance and long-term stability. This study investigates the effects of deposition temperature and annealing on nanostructured LSC thin film electrodes, revealing the importance of surface and interface tuning for improved electrochemical performance and stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Editorial Material
Chemistry, Physical
Stephen J. Skinner, Viola Birss, Jennifer Rupp, Roger A. De Souza
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Materials Science, Ceramics
Duke P. C. Shih, Ainara Aguadero, Stephen J. Skinner
Summary: This study investigates the effect of A-site monovalent ions (K+ and Li+) on the electrical conductivity of NBT. The results show that partial replacement of Bi3+ with monovalent ions significantly improves the ionic conductivity, possibly due to an increase in oxygen vacancy concentration. The isotope exchange depth profile method confirms that oxygen ions are the main charge carriers.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Electrochemistry
George E. Wilson, Ieuan D. Seymour, Andrea Cavallaro, Stephen J. Skinner, Ainara Aguadero
Summary: The use of perovskite materials for thermochemical energy storage and oxygen separation has been gaining momentum due to their large oxygen exchange capacity and flexibility. This study investigates antimony-substituted strontium cobalt oxides as new materials for thermochemical oxygen separation. The results reveal exceptional redox kinetics and cyclability, with higher oxygen evolution and hindered reduction due to the inductive effect of antimony dopants. The identified material, SrCo0.95Sb0.05O3-delta, shows great potential for oxygen production under temperature-swing reaction configurations.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Nicholas J. Williams, Ieuan D. Seymour, Dimitrios Fraggedakis, Stephen J. Skinner
Summary: In this study, the activation losses at solid oxide fuel cell (SOFC) electrodes were investigated by simulating charge transfer using density functional theory (DFT). The electrostatic responses to the electric field were found to correlate with experimental data for different reduction reactions at mixed ionic-electronic conducting (MIEC) electrode surfaces. The study also highlighted the importance of decoupled ion-electron transfer and charged adsorbates on the performance of electrodes under nonequilibrium conditions. The findings have potential implications in energy storage and catalysis.
Article
Multidisciplinary Sciences
Michael High, Clemens F. Patzschke, Liya Zheng, Dewang Zeng, Oriol Gavalda-Diaz, Nan Ding, Ka Ho Horace Chien, Zili Zhang, George E. Wilson, Andrey Berenov, Stephen J. Skinner, Kyra L. Sedransk Campbell, Rui Xiao, Paul S. Fennell, Qilei Song
Summary: This study reports the preparation of durable copper-based redox sorbents using a precursor engineering approach for thermochemical looping processes. The redox sorbents showed enhanced reaction rates, stable oxygen storage capacity, and efficient gas purification over a broad temperature range.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Nicholas J. Williams, Ieuan D. Seymour, Robert T. Leah, Aayan Banerjee, Subhasish Mukerjee, Stephen J. Skinner
Summary: Non-equilibrium thermodynamics describes the current-voltage characteristics of electrochemical devices. In this study, the activation overpotential for the metal/mixed ionic-electronic conducting composite electrodes originates at the interface between the material and gas. The driving force for coupled ion-electron transfer is held at the interface, and the rate of transfer scales with the availability of free sites on the metallic surface.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Juan F. Basbus, Mauricio D. Arce, Jose A. Alonso, Miguel A. Gonzalez, Gabriel J. Cuello, Maria T. Fernandez-Diaz, Zijie Sha, Stephen J. Skinner, Liliana Mogni, Adriana C. Serquis
Summary: Understanding the protonic defect transport mechanism in Ba(Ce,Zr)O-3 perovskite oxides and defining the appropriate temperature range are important for material design and application. Structural features, lattice distortions, and proton diffusion play key roles in protonic conduction.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Nicholas J. Williams, Ieuan D. Seymour, Robert T. Leah, Subhasish Mukerjee, Mark Selby, Stephen J. Skinner
Summary: This study established a model to explain the enhancement of electrochemical activity of MIEC electrode as the steam and hydrogen pressure is increased in both fuel cell and electrolysis modes, and accurately predicted this through validation with experimental data.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
