Article
Materials Science, Ceramics
Gaopeng Zhou, Ying Li, Yadan Luo, Wenlong Huang, Bo Li
Summary: This study investigates the substitution effect of different Ca2+ concentrations at A-sites in perovskites and its impact on the electrical properties and chemical stability. The results show that increasing Ca2+ concentration improves the chemical stability but reduces the conductivity of the materials.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Zhen Wang, Luyao Ding, Shenglong Yu, Huan Xu, Xiaohui Hao, Yi Sun, Tianmin He
Summary: A comparative study was conducted to investigate the effect of different addition strategies for a sintering aid of ZnO on the performance of the BaZr0.4Ce0.4Y0.2O3-delta electrolyte. The results showed that the internally-doped sample exhibited higher relative density and lower grain boundary core barrier height, leading to higher power density and better ion transport performance.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Donglin Han, Kazuhiro Goto, Masatoshi Majima, Tetsuya Uda
Summary: The addition of NiO in Y-doped BaZrO3, BaCeO3, and BaZr1-xCexO3 decreases dehydration temperature and proton concentration, leading to reduced ionic conductivity and transport number. This results in worse ion conductivity and brittle electrolyte in Ce-rich samples containing Ni.
Article
Materials Science, Ceramics
L. S. Hagy, K. Ramos, M. V. Gelfuso, A. L. Chinelatto, A. S. A. Chinelatto
Summary: The reduction of sintering time and temperature for BaCe0.2Zr0.7Y0.1O3-delta was investigated using unconventional route and sintering aid. Effects of ZnO addition and microwave sintering on structure, sinterability, microstructure, and electrical conductivity were explored. Both ZnO addition and microwave sintering improved the density and conductivity, with microwave sintering providing a rapid alternative for sintering.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Donglin Han, Xin Liu, Tor Svendsen Bjorheim, Tetsuya Uda
Summary: Increasing Ce content in Y-doped BaZrO3, BaCeO3, and their solid solutions stabilizes protons, increases oxide ion conductivity, and decreases hole conduction, thereby enhancing the ionic conduction of BZCY20 for improved performance in fuel cells and electrolysis cells.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Hiroki Uehara, Akihiro Ishii, Itaru Oikawa, Hitoshi Takamura
Summary: A new mixed proton-hole conducting material is developed by doping cobalt into BaZr1-xScxO3-delta, which exhibits high hole conductivity. The study investigates the phases present, proton incorporation, and electrical conductivity of BaCoxZr0.9-xSc0.1O3-delta. It is found that Sc doping increases the cobalt solubility limit in BaZrO3 and conductive protons are incorporated in the bulk portion of Co, Sc-doped BaZrO3. BaCoxZr0.9Sc0.1O3-delta shows higher conductivity than Fe or Pr doped BaMxZr1-x-yYyO3-delta. The maximum conductivity is achieved for BaCo0.2Zr0.7Sc0.1O3-delta in both wet and dry oxidizing atmospheres.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
L. Spiridigliozzi, G. Accardo, E. Audasso, S. P. Yoon, G. Dell'Agli
Summary: Orthorhombic perovskite materials BaCe0.85Gd0.15O3-& delta; (BCGO) doped with variable amounts of CuO (0-5 mol%) were synthesized and exhibited high total ionic conductivities. Various characterization techniques were used to analyze the samples, including X-ray Diffraction (XRD), Rietveld refinement, Scanning Electron Microscopy (SEM), Raman spectroscopy, and Electrochemical Impedance Spectroscopy analysis (EIS). The addition of copper as a sintering aid improved the density and conductivity of BCGO, with the optimal content being around 2 mol%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Meilong Chen, Mingyang Zhou, Zhijun Liu, Jiang Liu
Summary: This paper compares the performance of two proton-conducting ceramic fuel cell electrolyte materials, BZY and BZCY. The results show that while BZCY has higher conductivity, BZY exhibits greater stability in a CO2-containing environment.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Tomohiro Kuroha, Yoshiki Niina, Mizuki Shudo, Go Sakai, Naoki Matsunaga, Takehito Goto, Kosuke Yamauchi, Yuichi Mikami, Yuji Okuyama
Summary: This study investigates ceramic tape-casting and anode electrolyte co-firing for large-scale manufacturing of protonic ceramic fuel cells. It confirms the reactivity of certain metal elements with the anode material and reveals that NiO doping decreases the proton conductivity of all materials. The research identifies the suitable material BZYb20 for this fabrication technique.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Bibek Kumar Sonu, Ela Sinha
Summary: Barium cerate perovskite ceramics substituted with zirconium were prepared and characterized in terms of thermal stability and electrical conductivity. With increasing Zr-substitution, the thermal stability of the ceramics improved gradually. Complex impedance spectroscopy studies demonstrated the influence of bulk and grain boundary on the total resistance. Additionally, the Arrhenius dependence of the total conductivity showed a decrease with an increase in Zr concentration, especially in wet nitrogen atmosphere.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Donglin Han, Lulu Jiang, Peng Zhong
Summary: This study improved the phase compatibility between BaZrO3-based electrolyte and NiO electrode substrate by adjusting the electrolyte composition and selecting proper dopants. However, high temperature heat treatment during co-sintering led to Ni diffusion into the electrolyte layer, negatively impacting performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Electrical & Electronic
Kethlinn Ramos, Leonardo Pacheco Wendler, Adilson Luiz Chinelatto, Adriana Antonio Chinelatto, Dulcina Pinatti Ferreira de Souza
Summary: Solid oxide fuel cells, being highly efficient and environmentally friendly, face limitations due to their high operating temperatures. This study focuses on reducing the temperatures by using proton conductors as the electrolyte, specifically yttrium-doped barium cerate with high conductivity. Through solid-state reaction, dense pellets of BaCe0.9Y0.1O3-delta were successfully obtained at a low sintering temperature of 1200 oC without sintering aid, enabling co-sintering with other cell components. The study also highlights the role of intrinsic liquid phase in the microstructural development and its effect on promoting densification and specific grain boundary conductivities at low temperatures.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Electrochemistry
Kwati Leonard, Yuji Okuyama, Mariya E. Ivanova, Wilhelm A. Meulenberg, Hiroshige Matsumoto
Summary: Acceptor-doped barium zirconate cerate electrolytes have potential applications in highly efficient and environmentally friendly electrochemical devices. By optimizing the ionic conductivity, the Ba(ZrxCe10-x)(0.08)Y0.2O3-delta (1 <= x <= 9) material shows superior conductivity for moderate temperature electrolysis.
Article
Chemistry, Physical
Donglin Han, Kazuaki Toyoura, Tetsuya Uda
Summary: This study investigates the hydration behavior of acceptor-doped BaZrO3 under varying water vapor pressure and reveals that hydration process increases proton concentration and lattice constants. The chemical expansion due to water incorporation influences the local crystal structure and can effectively suppress hole conduction in BaZrO3, showing a feasible strategy to enhance the performance of electrochemical devices.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Francisco J. A. Loureiro, Devaraj Ramasamy, Sergey M. Mikhalev, Aliaksandr L. Shaula, Daniel A. Macedo, Duncan P. Fagg
Summary: Protonic ceramic fuel cells show promise for energy conversion at intermediate temperatures. High order nickelates could be attractive cathode materials due to their high electrical conductivities. Composite cathodes in this study show improved performance, especially in wet O-2 conditions, with the correction of potential measurement biases.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Mingyang Zhao, Eric O'Quinn, Nancy Birkner, Yun Xu, Maik Lang, Kyle Brinkman
Summary: The study investigated the effects of B-site dopants on radiation stability of hollandite samples irradiated by a high-energy ion beam. Different radiation responses were observed in hollandite with different B-site dopants, with Ga-substituted hollandite showing the best radiation stability. Thermal analysis after annealing revealed complex structural evolution of the radiation damaged hollandite structure at different length-scales.
Article
Chemistry, Multidisciplinary
Nancy Birkner, Changlong Li, Shanna L. Estes, Kyle S. Brinkman
Summary: The study examined the interplay of Li7-3xGaxLa3Zr2O12 electrolytes with various levels of Ga-doping, finding that stability and conductivity decrease with increased Ga substitution due to an increase in defects and blocked ion migration pathways. Excessive Ga doping beyond a certain threshold led to a significant decrease in stability and conductivity by disrupting the Li-ion hopping distance.
Article
Chemistry, Physical
Timothy J. Lynch, Nancy R. Birkner, Matthew S. Christian, Jacob A. Wrubel, Juliano Schorne-Pinto, Arjen Van Veelen, John R. Bargar, Theodore M. Besmann, Kyle S. Brinkman, Wilson K. S. Chiu
Summary: Understanding the local environment of metal atoms in salt melts is crucial for modeling their properties and predicting their behavior. We have developed an in situ approach using X-ray absorption spectroscopy and Raman spectroscopy to measure the coordination of metals in molten salt. Our findings show that the coordination numbers of metal atoms decrease with increasing temperature.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Materials Science, Ceramics
Mingyang Zhao, Nancy Birkner, Joseph Schaeperkoetter, Robert J. Koch, Patrick Russell, Scott T. Misture, Theodore Besmann, Jake Amoroso, Kyle S. Brinkman
Summary: A series of Cr-substituted hollandite solid solution with a broad range of Cs content were investigated. Increasing Cs content induced a phase transition and improved thermodynamic stability. The study also found that the leaching performance of Cr hollandite samples was lower compared to other systems.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Matthew S. Christian, Timothy J. Lynch, Juliano Schorne-Pinto, Amir M. Mofrad, Nancy R. Birkner, Kyle S. Brinkman, Wilson K. S. Chiu, Theodore M. Besmann
Summary: Understanding the local structure of metal ions in molten salt melts is crucial for various applications, but modeling this dynamic structure is challenging due to the limitations of classical mechanics. In this study, the researchers used the USPEX evolutionary algorithm to predict the coordination numbers of strontium and zirconium in chloride and fluoride melts. The results were consistent with experimental observations, validating the approach for predicting local structures in salt melts.
JOURNAL OF PHYSICAL CHEMISTRY C
(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)
Editorial Material
Electrochemistry
Robert D. Green, S. Elango Elangovan, Fanglin Chen
Summary: In order to achieve long-term manned space exploration, critical needs for life support, such as oxygen and water, as well as electrical power for on-board operation, and the generation of propellants for ascent vehicles are essential. Low temperature electrochemical devices have been developed and used for on-board oxygen and power generation in previous manned space programs. High temperature solid oxide cell technology has unique advantages for future space missions. This perspective highlights the recent advances in solid oxide cell technology that make it feasible for adoption in aerospace applications and outlines the projected needs for future research and development to better support space exploration.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Ziwei Zheng, Junmeng Jing, Haorui Yu, Zhibin Yang, Chao Jin, Fanglin Chen, Suping Peng
Summary: Designing an efficient cathode and accelerating the sluggish oxygen reduction reaction process are crucial for enhancing electrochemical outputs in solid oxide fuel cells (SOFCs). A novel multifunction layer cathode, combining a Gd0.2Ce0.8O2-delta (GDC) interlayer with a La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) cathode functional layer, is reported in this study. By precisely controlling the concentration of the infiltration precursor solution, discrete and filmy LSCF coatings on the GDC scaffold can be prepared, with the film-like coating exhibiting lower initial polarization impedance and better stability. The as-obtained SOFCs exhibit enhanced peak power density and long-term operation stability.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
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)
Editorial Material
Materials Science, Ceramics
Kyle Brinkman, Armin Feldhoff, Eva Hemmer, Krista Carlson
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Christopher S. Dandeneau, Rahul Rajeev, Kyle S. Brinkman, Dale A. Hitchcock, Brenda L. Garcia-Diaz
Summary: Microwave-assisted solution combustion synthesis (SCS) process was developed to produce undoped and Ga-doped LLZO powders. Urea was found to be a more suitable fuel, ensuring complete combustion and inducing a higher degree of crystallinity in the as-processed powder. Optimization of SCS reaction chemistry may enable synthesis of single-phase cubic LLZO without the need for a calcination step, greatly simplifying the LLZO fabrication process.
JOURNAL OF MATERIALS SCIENCE
(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
Chemistry, Physical
Minda Zou, Jacob Conrad, Bridget Sheridan, Jiawei Zhang, Hua Huang, Shenglong Mu, Tianyi Zhou, Zeyu Zhao, Kyle S. Brinkman, Hai Xiao, Fei Peng, Jianhua Tong
Summary: This study presents a cost-effective 3D printing technique for manufacturing large-area tubular PCFCs, allowing for low-cost material preparation and achieving exemplary shape/dimension-controlled uniform microstructures. The 3D-printed tubular PCFC exhibits a high power output and long-term stability, indicating its potential for realistic applications and scale-up.
ACS ENERGY LETTERS
(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
Materials Science, Multidisciplinary
Mingyuan Ge, Xiaojing Huang, Hanfei Yan, Doga Gursoy, Yuqing Meng, Jiayong Zhang, Sanjit Ghose, Wilson K. S. Chiu, Kyle S. Brinkman, Yong S. Chu
Summary: This study utilizes X-ray fluorescence tomography to explore the composition of grain networks, uncovering mechanistic insights into phase transformations and transport properties in mixed ionic-electronic conductor systems. Visualizing composition variations across complex interfaces, along with quantitative composition analysis, reveals mechanistic pathways of diverse phase transformations and composition stability ranges.
COMMUNICATIONS MATERIALS
(2022)
