Article
Materials Science, Ceramics
Kazuhiro Yamamoto, Kazunori Sato, Motohide Matsuda, Masakuni Ozawa, Satoshi Ohara
Summary: In this study, tailored ceramic Gd-doped ceria (GDC) nanocubes with highly reactive {100} facets were densely integrated on a low-temperature-sinterable (La0.6Sr0.4)0.95Co0.2Fe0.8O3-? (LSCF) cathode support by electrophoretic deposition (EPD), forming a 1μm thick dense solid electrolyte thin film. This approach offers a suitable material preparation solution for low-temperature solid oxide fuel cells.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Ch. Madhusudan, Venkataramana Kasarapu, Madhuri Chittimadula, Y. Suresh Reddy, C. Vishnuvardhan Reddy
Summary: The electrical conductivities and thermal expansion studies of microwave sintered co-doped ceria materials were discussed for intermediate temperature solid oxide fuel cells. The materials exhibited high relative densities and a single-phase cubic structure, with linear thermal expansion coefficients and low activation energies. Among the samples, Ce0.80Y0.10Dy0.10O2-δ showed the highest total ionic conductivity and may be a promising solid electrolyte material for IT-SOFCs.
Article
Chemistry, Physical
Grazia Accardo, Ander Orue, Dimitrios Chatzogiannakis, Pawel Gluchowski, Montserrat Casas-Cabanas, Pedro Lopez-Aranguren
Summary: In this study, a two-step process to fabricate LLZO electrolytes with a high relative density under low temperature was proposed. The high-pressure low-temperature method was used to achieve high ionic conductivity, and the practical application was demonstrated through experiments on lithium stripping and plating. This research provides guidelines for controlling the microstructure of LLZO and contributes to the understanding of the correlations between microstructure and conductivity.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Ceramics
Murat Murutoglu, Aygul Alkan Gultekin, Busra Gunhan, Tugce Ucun, Aligul Buyukaksoy, Ugur Ozsarac, Huseyin Yilmaz
Summary: Sm0.2Ce0.8O1.9-30% Na2CO3 (SDC-30N) nano-composite electrolytes were densified in a single step via cold sintering process (CSP), achieving a density of 97% of theoretical density. The CSP technique preserved the nano nature of the nano-composite and resulted in a high electrical conductivity of 2.2 x 10(-2) S cm(-1) at 600 ℃ with an activation energy of 0.83 eV for SDC-30N nano-composites. This study demonstrated that the implementation of CSP significantly enhanced the densification of nano-composite electrolytes and made them suitable for efficient utilization in SOFC applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Shiva Bejugama, Shibu Chameettachal, Falguni Pati, Ajoy Kumar Pandey
Summary: The study synthesized Niobia doped Ceria Stabilized Zirconia powders using a co-precipitation method, achieving fine grain size, high hardness, and optimal fracture toughness through two-step sintering. Accelerated hydrothermal aging test showed the samples' high resistance to Low Temperature Degradation without phase change. Cell compatibility test indicated the high biocompatibility of the samples.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Hojae Lee, Junghum Park, Yonghyun Lim, Young-Beom Kim
Summary: The study develops a method for fabricating a dense gadolinia-doped ceria (GDC) functional layer using a sacrificial bismuth oxide, Bi2O3, sintering aid layer above the GDC layer, even under constrained sintering conditions. This approach improves the solid oxide fuel cell performance significantly.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Hang Bao, Ruijie Chen, Xinrui Wang, Yang Yang, Tianqiang Lin, Xinxin Wang, Xuemei Ou, Yunfeng Tian, Yihan Ling
Summary: Doped BaZrO3 and doped-ceria have potential as electrolyte materials for low-temperature solid oxide fuel cells. By preparing one-step-co-fired BaZr0.8Y0.2O3-delta(BZY)-LCO composite electrolytes, the 3BZY-LCO showed the best overall performance in terms of sintering activity, total conductivity, and cell performance.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
A. A. A. da Silva, M. C. Steil, F. N. Tabuti, R. C. Rabelo-Neto, F. B. Noronha, L. Mattos, F. C. Fonseca
Summary: Research showed that ceria dopant has a significant impact on the stability and catalytic activity of direct ethanol solid oxide fuel cells, demonstrating stability in ethanol steam reforming. The Ni/doped-ceria anodic catalytic layer can provide the steam needed for internal reforming, resulting in stable fuel cell operation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Ceramics
Yonghyun Lim, Hojae Lee, Junghum Park, Young-Beom Kim
Summary: Solid oxide fuel cells (SOFCs) have the potential to become the next-generation energy conversion systems. However, the high processing temperature required for their multi-layer ceramic components has been a major barrier for commercialization. Researchers have developed a bi-layer sintering method that effectively lowers the sintering temperature of the electrolyte, leading to comparable cell performance with significantly reduced temperature.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Michael Knight, Dylan Jennings, Sandrine Ricote, Ivar Reimanis
Summary: This study investigated the valence state of Ni in solid-state reactive sintered BZY with different Ni concentrations. The results showed the presence of transient BaY2NiO5 phase and confirmed that low-spin Ni3+ predominantly substitutes for Zr4+ in the microstructure.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Adam Alemayehu, Mattia Biesuz, Kimia Y. Javan, Alexander Tkach, Paula M. Vilarinho, Vincenzo M. Sglavo, Vaclav Tyrpekl
Summary: Ultrafast high-temperature sintering (UHS) is a rapidly growing research area in material science and engineering. In this study, single and multi-step approaches were used to UHS gadolinia-doped ceria (GDC) powders. The sintered ceramics were characterized both physically and electrochemically. With a gradual application of power during the multistep UHS process, crack-free GDC ceramics with 95% bulk density can be obtained using commercial powder. The same multistep sintering process using oxalate converted GDC powder resulted in 86% bulk density. It was also demonstrated that multistep UHS is suitable for multilayer cosintering necessary for solid oxide fuel cells (SOFC), as evidenced by the production of dense GDC electrolyte in tight contact with porous electrodes.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
L. A. Dunyushkina, A. Sh Khaliullina, A. N. Meshcherskikh, A. A. Pankratov
Summary: This study investigates the impact of adding 0.1-0.5 wt% Fe2O3 on the sintering and electrical properties of CaZr0.95-Sc0.05O3-δ ceramics synthesized by combustion method. The addition of Fe2O3 was found to enhance ceramic densification and grain coarsening, leading to a significant increase in electrical conductivity. The conductivity enhancement was attributed to the effects of ceramic densification, grain coarsening, and the formation of calcium ferrite at grain boundaries caused by Fe2O3 addition.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Tarini Prasad Mishra, Christian Lenser, Rishi Raj, Olivier Guillon, Martin Bram
Summary: Flash sintering is a rapid sintering method suitable for oxides and complex ceramics. Electrical parameters, such as electric field and electric current, influence the onset temperature and densification of flash sintering. Developing a processing map, exemplified by gadolinium-doped ceria, can guide flash sintering in different material systems.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Igor V. Zagaynov, Ivan V. Shelepin, Sergey V. Fedorov, Alexander V. Naumkin, Alexey V. Bykov, Anatoly A. Konovalov
Summary: Ceria based solid solution doped with copper, manganese, and rare earth elements were synthesized and shown to have enhanced surface area and oxygen mobility. The catalytic activity in CO oxidation was higher in samples containing neodymium compared to samarium. These materials also showed potential as solid electrolytes for intermediate temperature solid oxide fuel cells.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Tugce Ucun, Murat Murutoglu, Ozge Ulasan, Emrah Demirkal, Aligul Buyukaksoy, Yahya Kemal Tur, Huseyin Yilmaz
Summary: In this study, solid oxide fuel cells were fabricated using the cold sintering process for the first time, achieving crack-free electrolyte/anode interfaces at much lower temperatures than traditional methods. The use of cold sintering process limited grain growth in the anode and enhanced triple-phase boundary densities. The SOFCs constructed showed promising open-circuit potentials and power densities, with potential for further improvements by decreasing anode thickness.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Mingchao Su, Daoming Huan, Xueyu Hu, Kang Zhu, Ranran Peng, Changrong Xia
Summary: The study demonstrates that Ca-doped LaCoO3-delta and LaCoO3-delta oxides can effectively overcome CO2 poisoning issues, showing high electrical conductivity and thermal compatibility. Compared to LCCo, LCFe exhibits better CO2 tolerance and higher electrochemical performance.
JOURNAL OF POWER SOURCES
(2022)
Article
Materials Science, Ceramics
Jie Lin, Haixia Li, Wanhua Wang, Peng Qiu, Greg Tao, Kevin Huang, Fanglin Chen
Summary: Metal-supported solid oxide fuel cells (MS-SOFCs) were successfully fabricated using phase-inversion tape-casting and atmospheric plasma spraying techniques. The amount of binder in the slurries and the plasma power of the plasma spraying process significantly influenced the microstructure of the metal support, electrolyte, and cathode. The MS-SOFCs achieved high cell power density and low resistances under optimized conditions.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Hua Tong, Min Fu, Yang Yang, Fanglin Chen, Zetian Tao
Summary: A novel triple-conducting and cobalt-free iron-based perovskite cathode is reported for proton-conducting solid oxide fuel cells (H-SOFCs). By modifying the composition and microstructure, this cathode material exhibits excellent cell performance at 700 degrees C.
ADVANCED FUNCTIONAL MATERIALS
(2022)
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
Kang Zhu, Nai Shi, Lijie Zhang, Daoming Huan, Xinyu Li, Xiaoyu Zhang, Rui Song, Changrong Xia, Ranran Peng, Yalin Lu
Summary: Oxygen vacancy engineering via calcium-doping is proposed and validated to improve proton conduction in proton conducting oxides. The presence of more oxygen vacancies and the tailored position of vacancies accelerate proton diffusion and increase proton concentration. The doped compound BZCa1Y2 exhibits higher proton concentration, ionic conductivity, and proton diffusion coefficient compared to BZY2.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Binze Zhang, Shaowei Zhang, Zhen Zhang, Kaibin Tang, Changrong Xia
Summary: A highly efficient and robust metal-supported solid oxide electrolysis cell (SOEC) is developed, which exhibits redox stability, minimal ohmic loss, high conductivity, enlarged specific surface area, and enhanced CO2 adsorption property. The metal-supported SOEC with the infiltrated cathode shows excellent current densities and stability, making it a promising configuration for direct CO2 electrolysis.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Hairui Han, Xueyu Hu, Binze Zhang, Shaowei Zhang, Yanxiang Zhang, Changrong Xia
Summary: A method was proposed to determine the chemical surface exchange coefficient (k(chem)) and reveal the ORR process of porous dual-phase composites based on electrical conductivity relaxation measurements and the distribution of characteristic time (DCT) model. The method was demonstrated with porous LSCF-SDC composites, and it was found that the ORR process involved a combination of gas diffusion, surface exchange, and their interaction. The addition of SDC greatly improved k(chem) in the dual-phase composites, with the highest improvement achieved at around 10% SDC volume fraction. The method is also applicable for analyzing CO2 reduction and vapor splitting reactions in solid oxide electrolysis cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Haixia Li, Wanhua Wang, Lucun Wang, Min Wang, Ka-Young Park, Taehee Lee, Andreas Heyden, Dong Ding, Fanglin Chen
Summary: This study investigates the use of A-site Cadoped La1-xCaxCo0.2Fe0.8O3-delta oxides as cathode materials for efficient CO2 electrolysis in an intermediate-temperature SOEC. The results show that this cathode material exhibits outstanding electrocatalytic performance and stability, making it a promising candidate for the conversion of CO2 into valuable chemicals.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Yongtao Zhao, Shaowei Zhang, Mingchao Su, Daoming Huan, Ranran Peng, Changrong Xia
Summary: In this study, a stoichiometric CuFe2 alloy was successfully electroplated on the surface of SUS 430, forming a CuFe2O4 spinel coating through in-situ thermal oxidation. The mechanism of CuFe2 alloy electroplating was revealed using density functional theory calculations and COMSOL simulations. The dense CuFe2O4 coating effectively blocked the outward volatile Cr species and suppressed the increase in area specific resistance (ASR) in long-term testing. The practical application of CuFe2O4-coated SUS 430 showed improved durability due to mitigated chromium poisoning.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Xiaoye Liu, Xiangkun Kong, Wenyi Xiang, Yining Jiang, Bingqinq Xiong, Weiwei Ping, Changrong Xia, Daoming Huan, Chengwei Wang
Summary: In this study, a new garnet-type composite solid-state electrolyte (LLBZNO-LCO) was proposed to improve the chemical stability and electrochemical properties of garnet with high-temperature processing. The addition of a small amount of LCO significantly decreased the interface resistance and reduced the sintering temperature of garnet-type LLBZNO. The all-solid-state battery based on the sintered LLBZNO-LCO SSE showed excellent cycling stability. This approach provides a new strategy for optimizing the comprehensive performance of garnet SSE.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Xinyu Li, Zemin Chen, Daoming Huan, Bingbing Qiu, Kang Zhu, Zeming Qi, Hengjie Liu, Changrong Xia, Ranran Peng, Yalin Lu
Summary: This study demonstrates the successful modification of proton-conducting solid oxide fuel cell (PCFC) cathode surfaces using boron (B), leading to improved CO2 resistance and surface electrocatalytic activity for proton-involved oxygen reduction reaction (P-ORR). The introduction of B raises the surface Bronsted acid (-OH) concentration while suppressing the surface Lewis acidity, ultimately enhancing the power density of the PCFC.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Physical
Lujuan Ye, Kang Zhu, Yunan Jiang, Shaowei Zhang, Ranran Peng, Changrong Xia
Summary: Solid oxide electrolysis cells (SOECs) can efficiently convert CO2 into valuable chemicals. Ceria with exsolved Fe nanoparticles on its surface shows enhanced electrochemical performance for CO2 reduction reaction (CO2RR).
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Hairui Han, Yunan Jiang, Shaowei Zhang, Changrong Xia
Summary: This perspective paper estimates the possible physiochemical processes for the oxygen reduction reaction (ORR) in porous mixed ionic-electronic conductors (MIECs) by comparing the oxygen supply/consumption fluxes through calculation. It also discusses the potential problems associated with different characterization techniques and reveals the significant delay in the ORR process caused by gas diffusion. The aim of this paper is to recommend a reasonable method to characterize the true ORR kinetics of porous electrodes and quantify the effect of gas diffusion.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Ka-Young Park, Taehee Lee, Wanhua Wang, Haixia Li, Fanglin Chen
Summary: Carbon dioxide is a principal greenhouse gas responsible for global warming and extreme climate changes. Electrochemically converting CO2 into CO is a promising approach for industrial decarbonization. Solid oxide electrolysis cells (SOECs) have the potential for high-temperature CO2 electrolysis with high-energy efficiency, fast electrode kinetics, and competitive cost, but developing highly active and robust CO2 electrodes for SOECs remains a challenge.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Yunan Jiang, Lujuan Ye, Shaowei Zhang, Changrong Xia
Summary: Fe-exsolved ceria is a highly efficient cathode for CO2 electrolysis in SOEC, where dopant Fe is partially reduced to dispersed Fe-0 nanoparticles, greatly enhancing the catalytic activity for CO2 reduction. At 700 degrees C, the cathode polarization resistance is 0.57 omega cm(2), and the chemical surface exchange coefficient for CO2 reduction is 1.68 x 10(-3) cm s(-1), outperforming metal-exsolved perovskite cathodes at 800 degrees C.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
