Article
Engineering, Chemical
Yongliang Zhang, Kevin Huang
Summary: Surface exchange kinetics and bulk diffusion of oxygen are crucial for the performance of oxygen electrocatalysis and electrochemical devices. In this study, oxygen surface exchange rates and bulk conductivity/chemical diffusivity were measured for three mixed oxide-ion and electron conductors. The results showed that one of the conductors exhibited the best oxygen electrocatalytic performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Jian Song, Claudia Li, Shao Zhang, Kai Wang, Bo Meng, Xiaoyao Tan, Jaka Sunarso, Shaomin Liu
Summary: This study presents Sc-doped BCFe composites with enhanced thermal stability for BaCeO3-based ceramics. The BCFSc20 hollow fiber membranes exhibit the highest hydrogen and oxygen fluxes at high temperatures, along with excellent stability.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Jack H. Duffy, Yuqing Meng, Harry W. Abernathy, Kyle S. Brinkman
Summary: Y substitution increases lattice size and forms oxygen vacancies, resulting in a decrease in oxygen permeation flux and DC total conductivity. However, Y-doped samples show an order of magnitude increase in surface exchange rates compared to Zr-doped samples.
Article
Engineering, Chemical
Liana R. Tarutina, Gennady K. Vdovin, Julia G. Lyagaeva, Dmitry A. Medvedev
Summary: Mixed ionic-electronic conductors (MIECs) offer a convenient method for separating oxygen from air with high efficiency and low energy consumption. In this study, new strategies for fabricating MIEC-based membranes, including the preparation of a new BFZY material and using a tape-calendaring method, were proposed. Experimental results demonstrated that the membrane achieved maximal oxygen fluxes at 750 degrees C and 850 degrees C.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Bin Wang, Tao Li, Zhigang Wang, Mohd Hafiz Dzarfan Othman, Shaomin Liu, Rui Xiao
Summary: Hydrogen is a carbon-free energy carrier and water is an environmentally-friendly source for its production. Coupling catalytic water splitting with a mixed ionic-electronic conducting (MIEC) membrane reactor has shown great potential in enhancing hydrogen production. This review comprehensively covers critical aspects of this process, including materials, structure, morphology, catalysts, and operating conditions. Furthermore, integrating methane-related oxidation reactions can further intensify the process and improve the hydrogen production rate. Future development trends are also summarized.
Review
Chemistry, Multidisciplinary
F. Buck, K. Wiegers, A. Schulz, T. Schiestel
Summary: Perovskite hollow fibers have been utilized for oxygen extraction from various oxygen-containing plasmas. The study focused on the impact of working length and temperature on oxygen transport, comparing the results with a conventional electrically heated system. The feasibility of oxygen extraction in CO2 plasma was also investigated, achieving significant oxygen permeation values in both air and CO2 plasmas.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Physical
Yihang Li, Lixiang Yu, Yingqin Yu, Kristina Maliutina, Qixing Wu, Chuanxin He, Liangdong Fan
Summary: In this study, a new theoretical method based on the electrical conductivity relaxation technique was proposed to investigate the kinetics of CO2 reduction reaction on a typical electrode. Three kinetic parameters commonly used in electrochemical test experiments were derived, providing a new approach for studying the kinetic process of CO2 electrolysis and evaluating electrocatalyst activity of developed electrode materials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Han Gil Seo, Harry L. Tuller
Summary: The surface oxygen exchange kinetics of mixed ionic-electronic conducting (MIEC) oxides have important implications in various applications. Different methods have been used to measure the oxygen exchange coefficient, each with its advantages and limitations. The study demonstrates the precise measurement of the surface oxygen exchange coefficient of a model MIEC material using dilatometric relaxation measurements, particularly beneficial for materials with larger chemical expansion coefficients. This provides an opportunity to investigate the oxygen exchange and chemical expansion kinetics of various materials used in high-temperature applications with accuracy, especially in cases where conventional methods are not suitable.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Junji Hyodo, Shogo Kato, Shintaro Ida, Tatsumi Ishihara, Yuji Okuyama, Takaaki Sakai
Summary: Proton-conducting oxides have attracted attention as electrolyte materials for electrochemical devices operating at intermediate temperatures. Quantifying oxygen ion transport number is crucial for predicting fuel utilization efficiency in solid oxide fuel cells (SOFCs). This study evaluated the oxygen ion conductivities in Ba-doped LaYbO3 and revealed that proton conduction dominates in wide areas, particularly at temperatures below 600 degrees C.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Biochemistry & Molecular Biology
Zixiang Xu, Jian Yu, Wei Wang
Summary: This study improves the performance of CO2-resistant oxygen permeation membranes (OPMs) by co-doping with zirconium and yttrium, resulting in high oxygen permeation rate and relatively stable operation.
Article
Materials Science, Ceramics
Wentao Zhou, Zhaojun Li, Jianlin Li
Summary: The novel process of cladding drawing is used to produce strong and conducting glass fibers from reduced graphene oxide and soda-lime-silica glass, showing greatly improved mechanical properties and sensitivity to temperature due to the wrinkled configuration of the graphene oxide sheets. The fibers have a conducting network of graphene oxide sheets along their length, making them suitable for intensive wear conditions and potentially serving as built-in temperature sensors.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Kiryl Zakharchuk, Aleksandr Bamburov, Eugene N. Naumovich, Miguel A. Vieira, Aleksey A. Yaremchenko
Summary: The study investigates the incorporation of silicon into Ruddlesden-Popper La2NiO4+delta mixed conducting ceramics to improve chemical compatibility with lanthanum silicate-based solid electrolytes. Results show that silicon additions lead to segregation of secondary phases and suppress both electrical conductivity and oxygen-ionic transport in the ceramics. The preferential reactivity of silica with lanthanum oxide suggests a potential to enhance compatibility between solid electrolytes and electrodes through surface modifications.
Article
Chemistry, Physical
N. Tarasova, A. Galisheva, I. Animitsa, D. Korona, K. Davletbaev
Summary: This study focuses on a novel material, BaLaIn0.5Y0.5O4, with significantly improved properties for clean energy applications. By introducing Y3+ ions into the perovskite layer, the oxygen ionic conductivity and protonic conductivity are both enhanced.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Ceramics
Mtabazi G. Sahini, Benard S. Mwankemwa, Nikola Kanas
Summary: BSCF is an oxygen permeable MIEC membrane material with potential for high-temperature electrochemical applications, such as oxygen separation membranes and SOFC cathodes. Extensively studied, the material's properties include crystal structure, oxygen non-stoichiometry, synthesis, membrane fabrication, thermomechanical stability, phase stability, and mechanical properties. This review article aims to consolidate existing knowledge and provide a comprehensive understanding for researchers entering the field.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Wenyuan Liang, Yan Zhang, Tianmiao Hu, Heqing Jiang
Summary: By developing a mixed oxygen ion-proton-electron triple-conducting membrane LWO-LSF, a high H-2 flux in H-2 production was achieved by enhancing H-2 production efficiency through the permeation and counter-permeation of proton and oxygen ion.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
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)
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
Materials Science, Multidisciplinary
Satoru Tanaka, Akihiro Ishii, Mina Yamaguchi, Itaru Oikawa, Yusuke Yamazaki, Masaaki Imura, Hitoshi Takamura
Summary: In this study, black and electrically insulating Ag-Fe2O3-based coatings were prepared using reactive magnetron sputtering, stainless steel, and silver foil. The thin films showed blue light absorption and high electrical resistance comparable to Fe2O3 single crystals. By controlling the percentage of Ag in the film samples and the oxygen introduction, black and electrically insulating thin films composed of metallic Ag, amorphous Ag-Fe-O, and slightly crystallized Fe2O3 were obtained. The phase separation mechanism based on thermodynamic nonequilibrium oxidation of the metallic Ag phase was proposed.
Article
Nanoscience & Nanotechnology
Akihiro Ishii, Natsumi Nemoto, Mina Yamaguchi, Kosei Kobayashi, Itaru Oikawa, Akira Takano, Takuma Hitomi, Naohiro Hayashi, Hitoshi Takamura
Summary: The development of efficient and stable oxygen-reducing electrodes is crucial for efficient electrochemical cells. Composite electrodes composed of La(1-x)Sr(x)Co(1-y)Fe(y)O(3-δ) and doped CeO2 are considered promising for solid oxide fuel cells. This study demonstrates that the segregation of catalytic cobalt oxides and oxide-ion conducting paths greatly impacts the performance of the composite electrodes. By controlling the segregation process, microstructure, and phase evolution, stable low-resistance composite oxygen-reducing electrodes can be fabricated.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Electrochemistry
Youtaro Sakamoto, Akihiro Ishii, Takashi Shiratori, Itaru Oikawa, Hitoshi Takamura
Summary: Researchers developed a composite electrolyte consisting of conductive Li7La3Zr2O12 (LLZ) and sintering-free LiBH4, which is compatible with Li metal anodes. LLZ powder prepared by hand milling produced dense LLZ-LiBH4 composite. The LLZ-LiBH4 composite did not form secondary phases at a magic-angle-spinning nuclear magnetic resonance level. LiBH4 filled the space between LLZ particles up to a volume fraction of LLZ to 0.8, and the total ionic conductivity increased with increasing LLZ fraction. The LLZ-LiBH4 composite exhibited 670 times higher room-temperature ionic conductivity than LiBH4 alone. The Li+ conduction behavior of the LLZ-LiBH4 composite changed by the phase transition of LiBH4 to a high-temperature conductive phase. The current tolerance of Li|LLZ-LiBH4 composite|Li cell was comparable to that of a cell using a well-sintered LLZ electrolyte, indicating its potential use with Li metal anode.
ELECTROCHIMICA ACTA
(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
Computer Science, Information Systems
Kang Chen, Takasuke Irie, Takashi Iijima, Susumu Miyake, Takeshi Morita
Summary: In this study, we investigated the use of a DPLUS waveguide ultrasonic transducer for thermal ablation applications. The transducer consisted of a 1-meter long and low-loss fused quartz thin waveguide operating at an optimal frequency of 2.2 MHz. Experimental results showed that the temperature rise in tissue agreed well with simulation results under different ultrasound exposure times. Lesions were observed in the tissue after exposure times of 10 s, 20 s, and 30 s, with lesion sizes smaller than 2 mm.
Article
Chemistry, Physical
Kazuto Murakami, Yoko Sugawara, Junki Tomita, Akihiro Ishii, Itaru Oikawa, Hitoshi Takamura
Summary: It has been found in the study that co-doped Ce-Zr-based oxides with Co and Fe have high oxygen storage capacity at low temperatures. The presence of Fe induces phase transition and formation of an intermediate phase, improving the oxygen storage performance of the material.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Materials Science, Multidisciplinary
Hiroshi Tanimura, Norihiko L. Okamoto, Takao Homma, Yusuke Sato, Akihiro Ishii, Hitoshi Takamura, Tetsu Ichitsubo
Summary: This study investigates the ultrafast optical response of VTe2 and reveals the photoinduced phase transition process. It suggests that the high-temperature phase of VTe2 is induced within a picosecond through purely electronic effect and the phase transition dynamics proceed inhomogeneously via a nucleation mode.
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)
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
Computer Science, Information Systems
Kang Chen, Takasuke Irie, Takashi Iijima, Takashi Kasashima, Kota Yokoyama, Susumu Miyake, Takeshi Morita
Summary: This paper investigated the use of hard-type PZTs in Double Parabolic refLectors wave-guided Ultrasonic tranSducers (DPLUS) to achieve wide-frequency (20 kHz-2 MHz) high-power output (10 MPa). The results showed that under resonant excitation, the hard-type PZT DPLUS had significantly higher peak vibration velocity and acoustic pressure compared to soft-type piezoelectric materials DPLUS, making it suitable for various applications.
