Article
Materials Science, Ceramics
Guo Tianmin, Dong Jiangbo, Chen Zhengpeng, Rao Mumin, Li Mingfei, Li Tian, Ling Yihan
Summary: A high-entropy double perovskite cathode material, HE-GBO, with improved compatibility and activity is proposed for intermediate-temperature solid oxide fuel cells (IT-SOFCs). It shows a high potential to solve the conflict problem of thermal compatibility and catalytic activity in IT-SOFCs.
JOURNAL OF INORGANIC MATERIALS
(2023)
Article
Chemistry, Physical
Haoyu Zheng, Matthias Riegraf, Noriko Sata, Remi Costa
Summary: Proton conducting ceramic fuel cells and electrolyzers are new technologies that require the development of specific oxygen electrodes with high catalytic activity and stability. A composite oxygen electrode BGLC587-BZCY541 has been reported, which has low polarization resistance and high durability in high steam concentrations. An equivalent circuit model was used to analyze the effect of electronic leakage in the electrolyte and the oxygen electrode reaction process. pH(2)O, pO(2), applied current density, and operating temperatures strongly influence the electronic and ionic transference numbers, real polarization resistance, and faradaic efficiency (eta(FE)). Distribution of relaxation time analysis revealed that a surface-related oxygen electrode process is the rate-limiting step in steam electrolysis, and composite electrode structures may be favored for high performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Binze Zhang, Shaowei Zhang, Hairui Han, Kaibin Tang, Changrong Xia
Summary: The partial replacement of iron element with gallium in PrBaFe2O5+delta can improve its electrochemical performance as a cathode material for intermediate-temperature solid oxide fuel cells. Specifically, PrBaFe1.9Ga0.1O5+delta exhibits improved physicochemical properties and electrochemical properties, such as an increased oxygen surface exchange coefficient (kchem) and enhanced oxygen dissociation process. Moreover, the anode-supported single cell with PBFG0.1 cathode shows a higher peak power density and good stability in long-term operation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
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
Shibo Wang, Jingsheng Xu, Ming Wu, Zhaoyuan Song, Li Wang, Leilei Zhang, Jian Yang, Wen Long, Lei Zhang
Summary: Investigations were conducted on cobalt-free BaFe0.9Nb0.1O3-delta (BFNb) as a cathode material for intermediate-temperature solid oxide fuel cell (IT-SOFC). Results show the co-existence of at least cubic and tetragonal phases in the BFNb sintered at 1000 or 1100 degrees C, with high electrical conductivity and stability in the intermediate-temperature range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Fangze Chen, Dacheng Zhou, Xueqing Xiong, Juntao Pan, Donglin Cai, Ze Wei, Xiyong Chen, Yihui Liu, Nengneng Luo, Jialin Yan, Toyohisa Fujita
Summary: A series of single-phase double perovskite materials were engineered through A/B site co-doping strategy, and it was found that Pr0.5Gd0.5BaCo2O5+d with dual lanthanide doping exhibited improved electrical conductivity, reduced thermal expansion, and low electrochemical polarization resistance. Fe-doping in B-site effectively reduced the thermal expansion coefficients of Pr0.5Gd0.5BaCo2O5+d ceramics.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Multidisciplinary
Haoting Zhao, Zhao Pan, Xi Shen, Jianfa Zhao, Dabiao Lu, Jie Zhang, Zhiwei Hu, Chang-Yang Kuo, Chien-Te Chen, Ting-Shan Chan, Christoph J. Sahle, Cheng Dong, Takumi Nishikubo, Takehiro Koike, Zun-Yi Deng, Jiawang Hong, Runze Yu, Pu Yu, Masaki Azuma, Changqing Jin, Youwen Long
Summary: In this study, a new material Pb2CoMoO6 is reported, which exhibits negative thermal expansion (NTE) properties. The mechanism of NTE during the antiferroelectric-to-paraelectric transition is discussed. The material shows remarkable NTE in a wide temperature range of 30-420 K, indicating its potential applications.
Article
Chemistry, Physical
Ji Min Im, Kyeong Eun Song, Harald Schlegl, Hyunil Kang, Wonseok Choi, Seung-Wook Baek, Jun-Young Park, Hyun-Suk Kim, Jung Hyun Kim
Summary: In this study, the unique microstructure and electrical properties of SmBa0.5Sr0.5Co2O5+d (SBSCO) layered perovskite cathodes with dense and porous microstructures were analyzed by changing the applied current. It was observed that unique nanostructures were formed when a high current was applied to cathodes with both dense and porous microstructures of the same chemical composition for conductivity measurement.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
C. Lenser, J. Zhang, N. Russner, A. Weber, O. Guillon, N. H. Menzler
Summary: Doped ceria is investigated as an electrolyte material for solid oxide cells due to its high ionic conductivity. However, under fuel conditions, ceria is reduced and becomes a mixed ionic-electronic conductor. This leads to chemical expansion and inhomogeneous stresses across the electrolyte, which can cause cell failure. We developed a model to calculate the elastic stresses in the cell and found that it peaks at high temperatures and current densities, consistent with the observed onset of cell failure.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Jyotsana Kala, Uzma Anjum, B. K. Mani, M. Ali Haider
Summary: Double perovskite materials have potential applications as electrodes in solid oxide fuel cells and Li-air batteries. However, cation migration leading to material degradation is a major obstacle in material development. This study presents a theoretical approach combining density functional theory and molecular dynamics simulations to investigate Ba-cation segregation in a double perovskite NdBaCo2O5+& delta;. Strain application and introduction of dopants were proposed as solutions to mitigate segregation at the molecular level.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Peiyi Lin, Xi Xu, Shoufu Yu, Yanru Yin, Martin Andersson, Lei Bi
Summary: The mismatch of the coefficients of thermal expansion between cathode and electrolyte is one of the challenges for high-performance proton-conducting solid oxide fuel cells. This study introduces the negative thermal expansion component YMO on the cathode to overcome this problem and improves cell performance.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Quan Yang, Guoqing Wang, Haodong Wu, Bayu Admasu Beshiwork, Dong Tian, Shiyue Zhu, Yang Yang, Xiaoyong Lu, Yanzhi Ding, Yihan Ling, Yonghong Chen, Bin Lin
Summary: The high-entropy cathode HEP has shown outstanding electrochemical performance in SOFCs, indicating promising potential applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Chengzhi Sun, Yu Kong, Yongchao Niu, Xiaoju Yin, Naiqing Zhang
Summary: As a classical family of high-performance cathode materials, mixed ionic and electronic conductor (MIEC) is crucial for the low-temperature operation and high efficiency of solid oxide fuel cells. While Fe-based double perovskites have advantages of low cost, good thermal compatibility with the electrolyte, and high-temperature stability, their electrochemical properties for oxygen reduction reaction are unsatisfactory. This study demonstrates that substituting Zr for Fe in NdBaFe2O6??Δ (NBF) lattice can enhance oxygen vacancy concentration and the position of O p-band center, leading to improved oxygen reduction performance for the Zr-doped NBF cathode.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
M. E. Aristizabal, J. Vega-Castillo, G. Zimicz, F. Prado
Summary: The effect of the weight ratio of composite electrodes on the thermal expansion and polarization resistance for oxygen reduction reaction was investigated. The electrode with a 70 wt% of Ce0.9Pr0.1O2_& delta; showed the best combination of low thermal expansion and low polarization resistance. By incorporating Ce0.9Pr0.1O2_& delta;, the thermal expansion coefficient decreased while maintaining low polarization resistance comparable to cobaltite-based electrodes.
Article
Chemistry, Physical
Dong Xu, Xingkai Zhou, Yu Li, Xiaole Yu, Zhexiang Yu, Bochang Shi, Yaowei Mi, Bangze Wu, Lin Ge
Summary: This work investigates the sintering properties, thermal expansion coefficient, and chemical stability of hexagonal perovskite-related oxides Ba7Ta3.7Mo1.3O20.15 (BTM). The study also evaluates the chemical compatibility between BTM electrolyte and various electrode materials. The results show that BTM reacts highly with Ni, Co, Fe, Mn, Pr, Sr, and La elements in the electrodes, leading to the formation of resistive phases and deterioration of electrochemical properties.
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
Cristina Ramirez, Ali Saffar Shamshirgar, Domingo Perez-Coll, Maria Isabel Osendi, Pilar Miranzo, Girish C. Tewari, Maarit Karppinen, Irina Hussainova, Manuel Belmonte
Summary: 3D printing technologies combined with chemical vapor deposition can be used to fabricate new hybrid materials with tunable properties. The thickness and crystallinity of graphene-based coatings can be controlled by altering the parameters of chemical vapor deposition. Transmission electron microscopy confirms the successful growth of nanocrystalline graphene layers on 3D printed α-Al2O3 substrates, resulting in fully-connected and highly conductive pathways. In terms of thermal conductivity, specimens decorated with graphitic coatings exhibit higher thermal conductivity compared to bare ceramic scaffolds.
Article
Materials Science, Ceramics
Rafael Rubio-Vives, Jose M. Porras-Vazquez, Lucia dos Santos-Gomez, Javier Zamudio-Garcia, Antonia Infantes-Molina, Jesus Canales-Vazquez, David Marrero-Lopez, Enrique R. Losilla
Summary: In this study, ceramics with composition Ln(5.4)MoO(11.1) (Ln = Nd, Sm and Gd) were prepared and their polymorphic forms were investigated by sintering at different rates. X-ray diffraction studies confirmed single-phase materials, with a simple cubic fluorite structure for the quenching-cooled samples. Electron diffraction studies indicated the formation of domains with superstructure ordering. XPS analysis showed the presence of mixed Mo6+ and Mo5+ for all compositions, explaining the electronic conduction in an oxidizing atmosphere.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Angel Trivino-Pelaez, Jadra Mosa, Domingo Perez-Coll, Mario Aparicio, Glenn C. Mather
Summary: Sol-gel synthesis using alkoxides is employed to obtain fluorine-modified BaZr0.8Y0.2O3-delta nanopowders, which show inhibited carbonate formation and good chemical stability at high temperatures due to fluorine doping.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Review
Chemistry, Multidisciplinary
Glaydson Simoes Dos Reis, Shaikshavali Petnikota, Chandrasekar M. Subramaniyam, Helinando Pequeno de Oliveira, Sylvia Larsson, Mikael Thyrel, Ulla Lassi, Flaviano Garcia Alvarado
Summary: The development of sustainable, low-cost, high energy and density power-density energy storage devices is crucial for achieving a carbon-neutral society by 2050. Biomass-derived carbon materials are extensively researched as electrode candidates for potassium and aluminum batteries due to their well-developed textures and large microcrystalline interlayer spacing.
Review
Electrochemistry
Palanivel Molaiyan, Glaydson Simoes Dos Reis, Diwakar Karuppiah, Chandrasekar M. Subramaniyam, Flaviano Garcia-Alvarado, Ulla Lassi
Summary: This article introduces the research progress of biomass residues as carbon anode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (NIBs), focusing on the physicochemical structures and electrochemical properties of carbon materials. In addition, the challenges in this field are discussed. This review provides valuable insights and a reasonable understanding of the issues and challenges faced in the preparation, physicochemical properties, and application of biomass-derived carbon materials as anode candidates for LIBs and NIBs.
Article
Materials Science, Ceramics
Victor Zapata-Ramirez, Glenn C. Mather, Domingo Perez-Coll
Summary: This study reports the effects of Mo and Sb doping on SrFe0.5Co0.5O3-delta material. The Mo and Sb doped phases have higher oxygen content, while the Sb doped material has the greatest oxygen loss at temperatures above 350 degrees C. The Mo doped phase has a higher total oxygen content, resulting in higher conductivity. On the other hand, the Sb doped material has an increasing oxygen-vacancy content with temperature, and it has the most competitive electrode-polarisation resistance.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Fabulo Ribeiro Monteiro, Ana Gabriela Storion, Kethlinn Ramos, Lilian Menezes Jesus, Domingo Perez-Coll, Glenn C. Mather, Adilson Luiz Chinelatto, Eliria Maria de Jesus Agnolon Pallone
Summary: The effect of particle-to-particle contact on flash-sintered materials was investigated using pseudo-in-situ impedance spectroscopy. It was found that preparing powders using multiple milling and calcining steps improved charge-carrier mobility paths, facilitated homogeneous passage of electric current, reduced thermal gradients, and consequently resulted in better microstructural homogeneity and electrical conductivity.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Irene Diaz-Herrezuelo, Martin Koller, Asuncion Quintanilla, Gonzalo Vega, Jose A. Casas, Domingo Perez-Coll, Hanus Seiner, M. Isabel Osendi, Pilar Miranzo, Manuel Belmonte
Summary: The demand for hydrogen as a green energy source has significantly increased in recent years. Cubic zirconia ceramics, especially when manufactured into 3D porous structures, show promise as catalytic supports for hydrogen production. In this study, 3D patterned 8YSZ scaffolds with high porosity (up to 88%) were fabricated using robocasting and employed as catalytic supports for hydrogen production. The use of 3D Pd/8YSZ catalyst resulted in continuous CO-free H2 production with a 32% FA conversion at T = 55 degrees C.
CERAMICS INTERNATIONAL
(2023)
Review
Electrochemistry
Glaydson Simoes dos Reis, Palanivel Molaiyan, Chandrasekar M. Subramaniyam, Flaviano Garcia-Alvarado, Andrea Paolella, Helinando Pequeno de Oliveira, Ulla Lassi
Summary: The global demand for high-capacity and high-performing rechargeable batteries has led to the development of silicon-based anode materials. However, the high theoretical capacity of silicon is limited by its volume changes during cycling. Compositing silicon with carbon is a promising strategy to enable practical applications of silicon-based anodes for lithium-ion batteries and sodium-ion batteries.
ELECTROCHEMISTRY COMMUNICATIONS
(2023)
Article
Energy & Fuels
Jose Miguel Ramos-Fajardo, Isabel Maria Pelaez-Tirado, Juan Ramon Marin-Rueda, Miguel Castro-Garcia, Jesus Canales-Vazquez, Juan Carlos Perez-Flores
Summary: The development of binder-free LFP cathodes fabricated by FFF technology was reported in this study. The impact of carbon-LFP ratio and carbon source on electrochemical performance was analyzed. The LFP-based electrodes containing CB or GC microspheres showed a specific capacity of 150 mAh g(-1) and over 95% coulombic efficiency after 100 cycles.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Vanessa C. D. Graca, Laura I. V. Holz, Francisco J. A. Loureiro, Glenn C. Mather, Duncan P. Fagg
Summary: In recent years, there has been increasing interest in transition metal oxynitrides due to their attractive properties, such as high conductivity, hardness, and catalytic activity. Among them, niobium oxynitrides have shown great potential for various applications. This study focuses on the impact of ammonolysis conditions on the crystalline phase formation of niobium oxynitride compounds. The results demonstrate that careful control of ammonolysis conditions can tailor the anion composition, cation/anion ratio, and crystallographic structure of the materials.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Alberto Lopez-Grande, Glenn C. Mather, Francisco Munoz
Summary: LiPON films have been a major focus in Li-ion micro-batteries for low power applications, and understanding the relationship between composition, processing parameters and ionic conductivity has been a challenge for the materials community for the past three decades. A general model is proposed in this study to calculate the ionic conductivity of LiPON solid electrolytes for any composition. The model is based on the fundamental laws of chemical equilibrium and has been successfully used to predict the formation of different oxynitride compounds and their corresponding ionic conductivities.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Pilar Diaz-Carrasco, Alois Kuhn, Nieves Menendez, Flaviano Garcia-Alvarado
Summary: Ti/Fe substitution in ramsdellite LiTi2O4 has been studied, and the results showed that the substitution mechanism is more complex than predicted, involving the participation of Fe3+/Fe2+ and Ti4+/Ti3+. The LiFe0.125Ti1.875O4 material with low Ti/Fe substitution performed better than undoped LiTi2O4, and in the high voltage range, it outperformed higher Fe-substituted ramsdellites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
