Article
Materials Science, Multidisciplinary
Avishek Maity, Rajesh Dutta, Werner Paulus
Summary: The inelastic neutron scattering study of Pr2-xSrxNiO4+delta doped with holes reveals the presence of nondispersive antiferromagnetic spin stripe fluctuations above the spin stripe melting temperature. These fluctuations, observed at the incommensurate wave vector, indicate the persistence of instantaneous spin and charge stripe correlation above a certain temperature, while they are strongly diminished below the charge stripe melting temperature. This suggests that static charge stripe order is essential for the existence of dynamic spin stripe correlation.
Article
Materials Science, Ceramics
Jierong Liang, Rokas Sazinas, Kent Kammer Hansen
Summary: A new series of cobalt-based perovskite cathodes for intermediate temperature solid oxide fuel cells were studied, showing that samples rich in cobalt have thermal expansion coefficients more compatible with common electrolytes, but compromises need to be made between thermal expansion and electrical conductivity.
CERAMICS INTERNATIONAL
(2021)
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
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, Multidisciplinary
Javier Zamudio-Garcia, Leire Caizan-Juanarena, Jose M. Porras-Vazquez, Enrique R. Losilla, David Marrero-Lopez
Summary: This study investigates the influence of different electrolytes on the electrochemical performance of LSCF nanostructured electrodes. The results show that the ionic conductivity of the electrolyte has a significant impact on the polarization resistance of LSCF. Additionally, the rate-limiting steps for the oxygen reduction reaction (ORR) remain the same regardless of the electrolyte used.
Article
Materials Science, Ceramics
Inna A. Zvonareva, Anna V. Kasyanova, Artem P. Tarutin, Gennady K. Vdovin, Julia G. Lyagaeva, Dmitry A. Medvedev
Summary: Systematic studies on BaZr0.8-xSnxSc0.2O3-delta revealed that the composition with x = 0.1 exhibits the highest values in terms of ionic and grain conductivities. Low-level substitution of Zr4+ with Sn4+ ions shows promise in designing new proton-conducting electrolytes for high-temperature applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Shiquan Lil, Yanzhuo Zhu, Xinmin Fu, Rui Huang, Yanqing Guo, Wenxing Zhang, Hongliang Li, Lujin Hou, Xiangwei Meng
Summary: In this study, Pr-deficient PrxBF cathodes were found to enhance the electrochemical properties and catalytic activity while maintaining a lower thermal expansion coefficient. Among the PrxBF cathodes, Pr0.93BF exhibited the lowest polarization resistance and a good tolerance to CO2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Electrochemistry
Maria Carmenza Diaz Lacharme, Daniele Rossi, Stefano Campanari, Alessandro Donazzi
Summary: The novel cathode NBC-GDC shows improved electrocatalytic activity and stability at high temperatures, with a significant enhancement of polarization resistance and different ion transfer characteristics compared to conventional cathode LSCF-GDC. NBC-GDC performs better and more stably in the oxygen reduction reaction than LSCF-GDC.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Engineering, Chemical
Shenglin Liu, Wu Menglin, Lanying Lu, Jiupai Ni, Chengsheng Ni, John T. S. Irvine
Summary: The perovskite La0.5Ba0.5CuxFe1-xO3-delta was studied as a cathode for a protonic solid oxide fuel cell (H-SOFC), showing potential for improved performance. The introduction of Fe in the composition enhanced certain conductivity parameters but reduced proton conductivity, while mixed cations in La0.5Ba0.5Cu0.5Fe0.5O3-delta achieved a low thermal expansion coefficient.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Zhe Zhang, Sigeng Chen, Haixia Zhang, Chuangang Yao, Hao Lou, Mingcun Chen, Baixi Xia, Yuxi Sun, Xiaoshi Lang, Kedi Cai
Summary: In this study, Ta/Cu co-doped SrCo0.8Ta0.1Cu0.1O3- and Nb/Cu co-doped SrCo0.8Nb0.1-Cu0.1O3- perovskite oxides were prepared and compared as cathodes for solid oxide fuel cells. The synergistic effects of Ta/Cu and Nb/Cu resulted in well-regulated material properties, leading to reduced thermal expansion coefficient and enhanced electrochemical catalytic activity. At 800 degrees C, the co-doped SCTC showed lower ASR and higher output performance compared to SCNC.
CERAMICS INTERNATIONAL
(2023)
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
Jagoda Budnik, Aleksandra Mielewczyk-Gryn, Maria Gazda, Tadeusz Miruszewski
Summary: This study investigated the water uptake and oxygen transport properties of BaCe0.6Zr0.2Y0.1M0.1O3-delta samples at different pH2O using Thermogravimetry and Electrical Conductivity Relaxation methods. The results showed proton incorporation into the materials during the switch from dry to wet atmospheres. The kinetics of the water uptake process varied depending on the substituent used, and the pO2 dependence of total conductivity allowed for the determination of partial conductivities in BCZYTb.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Green & Sustainable Science & Technology
Victor Zapata-Ramirez, Paula Rosendo-Santos, Ulises Amador, Clemens Ritter, Glenn C. Mather, Domingo Perez-Coll
Summary: Strontium-ferrite-based perovskites have been studied as cobalt-free cathodes for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The experimental results show that the spray-pyrolysed electrodes exhibit lower resistances and smaller grain sizes at 700°C compared to the electrodes synthesized by the Pechini method. Moreover, the spray-pyrolysed electrodes, especially the Mo-doped phase, demonstrate better stability after thermal cycling and ageing tests.
Article
Chemistry, Physical
Xiuan Xi, Jianwen Liu, Wenzhi Luo, Yun Fan, Jiujun Zhang, Jing-Li Luo, Xian-Zhu Fu
Summary: Optimizing the Fe/Mo ratio significantly enhances the performance of Sr2FeMoO6-sigma double perovskites, while increasing Fe doping helps improve the reaction kinetics, facilitating oxygen ion transport.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Junyi Gong, Jie Hou
Summary: In this study, the surface of LSNM particles was modified to enhance the electrode reactions. The recovery of intrinsic nanostructure on the particle surface was successfully achieved by introducing A-site cation deficiency. The resulting D-LSNM cathode showed excellent performance in low-temperature proton-conducting solid oxide fuel cells.
APPLIED SURFACE SCIENCE
(2023)
Article
Electrochemistry
D. Al-Kattan, P. Lenormand, F. Mauvy, P. Rozier
Article
Materials Science, Ceramics
M. Legallais, S. Fourcade, U. -C. Chung, D. Michau, M. Maglione, F. Mauvy, C. Elissalde
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2018)
Article
Chemistry, Physical
Guillaume Gouget, Mathieu Duttine, U-Chan Chung, Sebastien Fourcade, Fabrice Mauvy, Marc-David Braida, Thierry Le Mercier, Alain Demourgues
CHEMISTRY OF MATERIALS
(2019)
Article
Chemistry, Physical
Sabah Amira, Mosbah Ferkhi, Mabrouk Belghobsi, Ammar Khaled, Fabrice Mauvy, Jean-Claude Grenier
Article
Chemistry, Physical
Sabah Amira, Mosbah Ferkhi, Ammar Khaled, Fabrice Mauvy, Jean-Claude Grenier, Laurent Houssiau, Jean-Jacques Pireaux
Article
Chemistry, Physical
T. Ogier, C. Prestipino, S. Figueroa, F. Mauvy, J. Mougin, J. C. Grenier, A. Demourgues, J. M. Bassat
CHEMICAL PHYSICS LETTERS
(2019)
Article
Chemistry, Multidisciplinary
Guillaume Gouget, Fabrice Mauvy, U-Chan Chung, Sebastien Fourcade, Mathieu Duttine, Marc-David Braida, Thierry Le Mercier, Alain Demourgues
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Materials Science, Ceramics
Louise Sevin, Volatiana Razafindramanana, Aurelie Julian-Jankowiak, Jean-Francois Justin, Fabrice Mauvy, F. Rebillat
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2020)
Article
Chemistry, Physical
Giulio Cordaro, Aurelien Flura, Alessandro Donazzi, Renato Pelosato, Fabrice Mauvy, Cinzia Cristiani, Giovanni Dotelli, Jean-Claude Grenier
SOLID STATE IONICS
(2020)
Article
Energy & Fuels
Giovanni Carollo, Alberto Garbujo, Fabrice Mauvy, Antonella Glisenti
Article
Chemistry, Inorganic & Nuclear
R. Essalim, A. Ammar, M. Zamama, F. Mauvy
JOURNAL OF SOLID STATE CHEMISTRY
(2020)
Article
Chemistry, Physical
L. Castro, E. Petit, A. Benayad, F. Mauvy, B. Pecquenard, F. Le Cras, C. Barchasz
SOLID STATE IONICS
(2020)
Article
Chemistry, Inorganic & Nuclear
Khalifa Souiwa, Eric Lebraud, Marion Gayot, Francois Weill, Fabrice Mauvy, Maxim Avdeev, Radhouane Chtourou, Mourad Hidouri, Olivier Toulemonde
Summary: The study reports on the structural characteristics of a new synthesized copper/chromium phosphate crystal, and investigates the oxidation states of copper and chromium, as well as their effects on the crystal phase transition.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
M. Legree, V Charbonnier, S. Al Bacha, K. Asano, K. Sakaki, I Aubert, F. Mauvy, J-L Bobet
Summary: In this study, the hydrogen generation performance of LPSO compounds and LPSO + Mg alloys in simulated seawater solution was investigated. Results showed that LPSO compounds, especially the single phase LPSO Mg(87.6N)i(5.5)Y(6.9), exhibited improved H2 generation features compared to pure Mg. Alloys containing both Mg and LPSO benefited from galvanic coupling between the two phases, leading to higher reactivity and lower activation energies.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Ceramics
Thomas Herisson de Beauvoir, Zakaria Ghomari, Geoffroy Chevallier, Andreas Flaureau, Alicia Weibel, Catherine Elissalde, Fabrice Mauvy, Rachman Chaim, Claude Estournes
Summary: Yttria stabilized zirconia ceramics prepared by Flash-SPS exhibit rapid densification and high hardness, providing new opportunities for the fabrication of porous lightweight ceramics with good mechanical properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)