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
Chemistry, Physical
Jagoda Urban-Klaehn, Clarita Y. Regalado Vera, Radoslaw Zaleski, Hanping Ding, Hongmei Luo, Dong Ding
Summary: The study focused on defect chemistry of doped BaZrO3 proton conductors, and its findings have significant implications for proton conductivity. Using positron annihilation lifetime spectroscopy, the researchers showed that yttrium doping increased the trapping rate of positrons, while scandium doping did not have the same effect. Additionally, low-temperature hydration significantly inhibited positron trapping in the samples.
SOLID STATE IONICS
(2023)
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
Chemistry, Multidisciplinary
Evgeniy Makagon, Olga Kraynis, Rotraut Merkle, Joachim Maier, Igor Lubomirsky
Summary: The study finds that doping decreases Young's modulus, and nominally dry samples generally have higher Young's modulus. All samples exhibit large non-classical electrostriction effects.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Energy & Fuels
Clarita Y. Regalado Vera, Hanping Ding, David Peterson, William T. Gibbons, Meng Zhou, Dong Ding
Summary: Doped barium zirconate is a material with high proton conductivity and chemical stability, considered promising for proton-conducting solid oxide electrochemical cells. While its proton conduction has been extensively studied, the specific phenomena behind its conduction properties are not fully understood. Specialized techniques and computational tools are beginning to elucidate the phenomena governing the material's conduction properties.
JOURNAL OF PHYSICS-ENERGY
(2021)
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
Electrochemistry
Lei He, Feng Zhang, Yan Xuan, Lei Zhang, Huiying Gao, Huaqing Pan, Sen Lian, Mingyue Wang, Jikang Yin, Xue Chen, Junfeng Ren, Meina Chen
Summary: This study utilized first-principles calculations to investigate the effects of Nd and Y co-doping on the surface and bulk properties of hydration reaction and proton conduction in BaZrO3. The results showed that Nd and Y promoted the accumulation of oxygen vacancies and protons on the surface, facilitating the hydration reaction and promoting proton transmission. The segregation of Nd and Y also had beneficial effects on proton transport through grain boundaries in BZNY.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
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
Chemistry, Multidisciplinary
Roman Andreev, Irina Animitsa
Summary: The new hexagonal perovskite-related compound Ba7In6Al2O19 was synthesized and found to exhibit reversible hydration. It showed oxygen-ion conductivity in dry air below 500°C and proton conductivity in wet air below 600°C.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Roman D. Andreev, Irina E. Animitsa
Summary: The perovskite-related oxide Ba5Y0.5In1.5Al2ZrO13 shows potential as a protonic conductor for solid oxide fuel cell applications. It exhibits high hydration ability and proton conductivity at intermediate temperatures.
Article
Chemistry, Physical
Zhaoyu Zhong, Xiaoqian Xu, Zhenhao Zhang, Jiao Li, Xue Guo, Shigang Wu, Haibin Sun
Summary: This study successfully fabricated dense BZCYYb electrolytes at low temperatures using microwave sintering technique, effectively suppressing barium evaporation and promoting grain growth, leading to improved electrical conductivity. The microwave-sintered BZCYYb electrolyte exhibited excellent conductivity at 700 degrees C, indicating its potential application in SOFCs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Guobin Qin, Jinxiao Bao, Jianquan Gao, Fei Ruan, Shengli An, Zhenbo Wang, Li Li
Summary: BaZrO3-based proton conductors show enhanced grain boundary conductivity and sintering performance through co-doping of Sc and Gd at B site. The incorporation of Sc promotes the generation of proton defects and lowers the proton migration energy barrier. Clustering of positively charged oxygen vacancy to acceptors suppresses proton trapping, improving long-range proton transport and bulk conductivity. Co-doping of Gd and Sc significantly reduces the Schottky barrier height and space charge layer width, resulting in higher grain boundary conductivity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Roman Andreev, Daniil Korona, Irina Anokhina, Irina Animitsa
Summary: The hexagonal perovskite Ba5In2Al2ZrO13 and In3+-doped phase Ba5In2.1Al2Zr0.9O12.95 were synthesized by solid-state synthesis. Both phases were capable of incorporating water due to the presence of oxygen deficient blocks and oxygen vacancies caused by doping. Infrared investigations confirmed the presence of different types of OH--groups in the structure. Impedance spectroscopy showed that In3+-doping increased conductivity by 0.5 order of magnitude in wet air. Both phases were dominant proton conductors at temperatures below 500 °C in wet conditions. The composition Ba5In2.1Al2Zr0.9O12.95 exhibited a proton conductivity of approximately 10(-4) S.cm(-1) at 500 °C.
Article
Engineering, Environmental
Chengyi Lu, Rongzheng Ren, Ziwei Zhu, Guang Pan, Gaige Wang, Chunming Xu, Jinshuo Qiao, Wang Sun, Qiaogao Huang, Hairui Liang, Zhenhua Wang, Kening Sun
Summary: This article reports on the development of a Nb5+ and Sc3+ co-doped BaCo0.4-Fe0.4Nb0.1Sc0.1O3-delta (BCFNS) perovskite oxygen electrode, which exhibits strong hydration capability and proton mobility. The co-doping of Nb5+ and Sc3+ significantly improves the electrolytic performance of PCECs, leading to higher current densities.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Ceramics
M. Khalid Hossain, Takayuki Yamamoto, Kenichi Hashizume
Summary: Doped BaZrO3-based materials with a trivalent cation show potential for various electrochemical device applications due to their excellent chemical stability and relatively high proton conductivity. By using a sintering aid element like Co, sintering problems of BaZrO3 can be solved, leading to improved relative density and the production of highly dense fine particles with clear grain boundaries, particularly in an oxygen atmosphere. This makes the materials promising for electrochemical hydrogen device applications.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Michael J. Ignatowich, Alexander H. Bork, Timothy C. Davenport, Jennifer L. M. Rupp, Chih-kai Yang, Yoshihiro Yamazaki, Sossina M. Haile
MRS COMMUNICATIONS
(2017)
Article
Chemistry, Physical
Shunta Nishioka, Junji Hyodo, Junie Jhon M. Vequizo, Shunsuke Yamashita, Hiromu Kumagai, Koji Kimoto, Akira Yamakata, Yoshihiro Yamazaki, Kazuhiko Maeda
Article
Chemistry, Physical
Yoshihiro Yamazaki, Raul Hernandez-Sanchez, Sossina M. Haile
CHEMISTRY OF MATERIALS
(2009)
Article
Chemistry, Physical
Yoshihiro Yamazaki, Raul Hernandez-Sanchez, Sossina M. Haile
JOURNAL OF MATERIALS CHEMISTRY
(2010)
Article
Chemistry, Physical
Frederic Blanc, Luke Sperrin, Daniel Lee, Riza Dervisoglu, Yoshihiro Yamazaki, Sossina M. Haile, Gael De Paepe, Clare P. Grey
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2014)
Article
Chemistry, Multidisciplinary
A. Suino, Y. Yamazaki, H. Nitta, K. Miura, H. Seto, R. Kanno, Y. Iijima, H. Sato, S. Takeda, E. Toya, T. Ohtsuki
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2008)
Article
Chemistry, Physical
Yoshihiro Yamazaki, Frederic Blanc, Yuji Okuyama, Lucienne Buannic, Juan C. Lucio-Vega, Clare P. Grey, Sossina M. Haile
Article
Nanoscience & Nanotechnology
Yoshihiro Yamazaki, Chih-Kai Yang, Sossina M. Haile
SCRIPTA MATERIALIA
(2011)
Article
Chemistry, Physical
Chih-Kai Yang, Yoshihiro Yamazaki, Aykut Aydin, Sossina M. Haile
JOURNAL OF MATERIALS CHEMISTRY A
(2014)
Article
Chemistry, Physical
Junji Hyodo, Koki Kitabayashi, Kenta Hoshino, Yuji Okuyama, Yoshihiro Yamazaki
ADVANCED ENERGY MATERIALS
(2020)
Article
Chemistry, Physical
Yoshihiro Yamazaki, Akihide Kuwabara, Junji Hyodo, Yuji Okuyama, Craig A. J. Fisher, Sossina M. Haile
CHEMISTRY OF MATERIALS
(2020)
Article
Chemistry, Physical
Junji Hyodo, Kota Tsujikawa, Motoki Shiga, Yuji Okuyama, Yoshihiro Yamazaki
Summary: Accelerated discovery of a proton-conducting oxide was demonstrated using data-driven structure-property maps for hydration of hypothetical perovskite oxides. This approach involved constructing trustworthy hydration training data sets and knowledge-based target variable engineering to achieve high accuracy in predicting proton concentration against temperature in unknown compositions extrapolated from the training data sets. The results are promising for speeding up the development and applications of proton-conducting oxides.
ACS ENERGY LETTERS
(2021)
Article
Energy & Fuels
Junji Hyodo, Yoshihiro Yamazaki
Summary: Proton-conducting oxides have great potential in environmentally friendly electrochemical cells, and research has found that mechanical strain significantly affects proton conduction and diffusion rates.
JOURNAL OF PHYSICS-ENERGY
(2022)
Article
Chemistry, Physical
Junie Jhon M. Vequizo, Shunta Nishioka, Junji Hyodo, Yoshihiro Yamazaki, Kazuhiko Maeda, Akira Yamakata
JOURNAL OF MATERIALS CHEMISTRY A
(2019)
