Article
Materials Science, Ceramics
Zhe Qiao, Shujing Li, Yuanbing Li, Nana Xu, Kun Xiang
Summary: BaZrO3 with dopants of Ca2+, Sr2+, Ti4+, and Ce4+ were studied for their structure, phase composition, mechanical, and thermal properties. The results showed that the doped BaZrO3 samples exhibited superior comprehensive behaviors with high strength and low thermal conductivity.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Prosper Ngabonziza, Rotraut Merkle, Yi Wang, Peter A. Aken, Tor S. Bjorheim, Joachim Maier, Jochen Mannhart
Summary: Ionically conducting oxide heterostructures are ideal for studying interfacial effects in solid state ionics, and 2D doping has not been applied in ion conductors before. In this study, epitaxial BaZrO3-BaYOx heterostructures and 2D doping of BaZrO3 by yttrium were reported, with effects on proton conductivity studied. This research not only provides fundamental insight into 2D doping of ion conductors, but also has the potential to improve protonic devices.
ADVANCED ENERGY MATERIALS
(2021)
Article
Materials Science, Ceramics
Jianing Wang, Shujing Li, Yuanbing Li, Zhe Qiao
Summary: This study introduces BaZrO3 as a second phase combined with MgO to prepare magnesium matrix composites, which show better dimensional stability, cold compression strength, and thermal shock stability compared to single-phase MgO.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Serra Melek Akyuz, Halit Eren Figen, Meltem Karaismailoglu Elibol
Summary: This study synthesized BaZrO3 perovskite powders via a sol-gel route and investigated the effects of doping with bismuth and calcium cations. The extensive characterization revealed that the metal cation incorporation enhanced the physicochemical properties of the BaZrO3 perovskite structure.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Environmental
Shih-Hao Yu, Wei-Yu Kao, Fu-Der Mai, Hui-Yen Tsai, Yu-Chuan Liu
Summary: Water is the most environmentally friendly solvent and recent research has focused on utilizing specially treated water for various applications. Plasmon-activated water produced through hot electron transfer from gold nanoparticles has been found to enhance chemical reactions and exhibit unique properties. This condensed Au-free water, known as PAW-V, has emerged as a promising green solvent with potential applications in physics, chemistry, and biomedicine.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Bin Zhao, Sein Chung, Min Zhang, Wuning Wei, Chaofeng Zhu, Chenghao Deng, Kilwon Cho, Zhipeng Kan
Summary: This study proposes an innovative strategy to enhance the performance of the commonly used anode interlayer PEDOT:PSS by incorporating molybdenum-containing semiconductors, resulting in improved efficiency of organic solar cells.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Energy & Fuels
D. Vignesh, Bibek Kumar Sonu, Ela Rout
Summary: Increasing urbanization and energy demand have led researchers to explore effective and efficient energy storage technology, with fuel cells being a well-known option. Proton conduction solid oxide fuel cells have shown advantages over conventional solid oxide fuel cells in several areas. However, there are still drawbacks associated with proton-conducting electrolyte materials, particularly fluctuation in proton conductivity among acceptor-doped compositions. This review article focuses on the factors that contribute to the formation of proton trapping sites and aims to find the optimal composition for maximum productivity.
Article
Nanoscience & Nanotechnology
Tuan T. Tran, Jennifer Wong-Leung, Lachlan A. Smillie, Anders Hallen, Maria G. Grimaldi, Jim S. Williams
Summary: In this study, it is shown that high-density amorphous germanium has exceptionally high carrier mobility and a high hole concentration. The temperature-dependent conductivity of the material is well-defined with two distinct regions, similar to crystalline germanium. These results provide direct evidence for preserved band structure and non-localized states within the valence band in high-density amorphous germanium.
Article
Chemistry, Physical
Shaofeng Yue, Junqing Zhao, Yi Sun, Hongwei Niu, Huyang Li, Yuhang Jing, N. R. Aluru
Summary: Dislocations have significant effects on the properties of oxide materials and electrochemical devices. A new multiscale simulation program was developed to study proton diffusion in dislocations, revealing the trapping effect caused by the large free space and hydrogen bonds in the dislocation core structure. The study provides insight into proton diffusion and offers guidance for proton conductor applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
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
Soonsung So, Jeong-Yun Kim, Duckjong Kim, Joo-Hyoung Lee
Summary: The study reveals that Pt-ALD can assist in the healing of defects in graphene, with single and double vacancies healed through direct Pt filling and carbon adatoms removed primarily through dissociation by oxygen molecules. The recovery of thermal conductivity is mainly achieved through the removal of carbon adatoms, while the improvement from vacancy filling is insignificant.
Article
Chemistry, Physical
Tong Wu, Xin Pang, Siwei Zhao, Shumao Xu, Zhanqiang Liu, Yongsheng Li, Fuqiang Huang
Summary: Developing high activity and stability bifunctional catalysts remains a challenge, but the directly synthesized Ta2CS2 shows excellent conductivity and electrochemical properties, making it an outstanding bifunctional catalyst of MXenes-based materials.
Article
Chemistry, Multidisciplinary
Jianxing Xia, Povilas Luizys, Maryte Daskeviciene, Chuanxiao Xiao, Kristina Kantminiene, Vygintas Jankauskas, Kasparas Rakstys, Gediminas Kreiza, Xiao-Xin Gao, Hiroyuki Kanda, Keith Gregory Brooks, Imanah Rafieh Alwani, Qurat Ul Ain, Jihua Zou, Guang Shao, Ruiyuan Hu, Zeliang Qiu, Andre Slonopas, Abdullah M. Asiri, Yi Zhang, Paul J. Dyson, Vytautas Getautis, Mohammad Khaja Nazeeruddin
Summary: Foldable hole-transporting materials (HTMs) are developed to extend the wavefunctions of A-site cations in perovskites, reducing trap recombination and improving the performance of perovskite-based electronic devices. By tailoring the foldability of HTMs, the power conversion efficiency of a small cell reaches 23.22%, while a mini-module achieves a high efficiency of 21.71% with a fill factor of 81%, the highest reported for non-spiro-OMeTAD-based perovskite solar modules.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Junhui Wang, Jiaxing Yu, Qi Fu, Huangsheng Yang, Qing Tong, Zhengping Hao, Gangfeng Ouyang
Summary: This study reports an unprecedented non-photomediated hole oxidation system constructed from carbon nanotubes and superoxides, which exhibits high catalytic activity for the degradation of organic pollutants. This finding opens up new research directions in the fields of environmental remediation, chemical synthesis, and biology.
ACS CENTRAL SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Jiongzhi Zheng, Dongliang Shi, Yuewang Yang, Chongjia Lin, He Huang, Ruiqiang Guo, Baoling Huang
Summary: We investigated the effects of cubic and quartic anharmonicity on lattice dynamics and thermal transport in highly anharmonic BaZrO3 crystal. The anharmonic phonon renormalization plays a crucial role in determining the finite-temperature phonon energies and lattice thermal conductivity. The lattice anharmonicity induces low-frequency optical phonon hardening, which significantly suppresses phonon scattering rates and enhances the thermal conductivity, with an emphasized importance at elevated temperatures.
Article
Materials Science, Ceramics
D. A. Krainova, N. S. Saetova, A. Kuzmin, A. A. Raskovalov, V. A. Eremin, M. Ananyev, R. Steinberger-Wilckens
CERAMICS INTERNATIONAL
(2020)
Article
Electrochemistry
A. Kuzmin, M. S. Plekhanov, A. S. Lesnichyova
ELECTROCHIMICA ACTA
(2020)
Article
Chemistry, Physical
A. Kuzmin, A. S. Lesnichyova, E. S. Tropin, A. Yu Stroeva, V. A. Vorotnikov, M. Solodyankina, S. A. Belyakov, M. S. Plekhanov, A. S. Farlenkov, D. A. Osinkin, M. Beresnev, M. Ananyev
JOURNAL OF POWER SOURCES
(2020)
Article
Materials Science, Ceramics
D. A. Krainova, N. S. Saetova, A. S. Farlenkov, A. V. Khodimchuk, I. G. Polyakova, A. V. Kuzmin
Summary: This study investigated the behavior of a non-crystallising glass sealant in contact with NiO-YSZ ceramics and an Fe-Ni alloy under different atmospheres and substrate materials. The results showed variations in the performance and behavior of the sealant under different conditions.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
A. S. Lesnichyova, S. A. Belyakov, A. Yu Stroeva, A. V. Kuzmin
Summary: Through a series of experiments, it was found that La0.9Sr0.1ScO3-delta exhibits the highest proton conductivity at 800 degrees Celsius, making it suitable for various electrochemical devices. The study results indicate that an increase in Sr dopant concentration will increase the partial conductivity of each charge carrier.
CERAMICS INTERNATIONAL
(2021)
Article
Electrochemistry
A. I. Kovrova, V. P. Gorelov, A. V. Kuzmin, E. S. Tropin, D. A. Osinkin
Summary: By preparing Ce20R submicron barrier layers on YSZ solid electrolyte, the chemical interaction between the electrode and the electrolyte can be prevented effectively, greatly increasing the electrode's polarization conductivity.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2021)
Article
Electrochemistry
A. Ivanov, M. Plekhanov, A. Kuzmin
Summary: This study investigates the influence of the design and formation factors of a solid oxide fuel cell on its performance and stability. The sintering strategy and the presence of a barrier layer are found to be crucial for achieving stable performance. Impregnation of the cathode and anode improves electrochemical performance, while the absence of a barrier layer leads to a decrease in performance.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2022)
Article
Materials Science, Ceramics
D. A. Krainova, N. S. Saetova, I. G. Polyakova, A. S. Farlenkov, D. A. Zamyatin, A. Kuzmin
Summary: This study investigates the behavior of a promising glass sealant under SOFC operating conditions, and demonstrates its good performance and potential application in SOFCs.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Maksim S. Plekhanov, Sabrina L. J. Thoma, Mirijam Zobel, Gabriel J. Cuello, Henry E. Fischer, Anton A. Raskovalov, Anton Kuzmin
Summary: The introduction of cobalt into a proton-conducting oxide can increase the number of incorporated protons and improve the proton conductivity. This finding enhances our understanding of proton transport in triple-conducting oxides.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Ceramics
N. S. Saetova, E. S. Shirokova, D. A. Krainova, N. S. Chebykin, B. A. Ananchenko, I. Tolstobrov, K. S. Belozerov, A. Kuzmin
Summary: This study tests the applicability of 3D printing technology in manufacturing glass sealants and finds the suitable composition of a glass-filled polymer compound for printing tubular SOFCs.
INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE
(2022)
Article
Crystallography
Semyon A. Belyakov, Evgeny Yu Gerasimov, Anton Kuzmin
Summary: Perovskite-like vanadate-molybdates are interesting due to their metal-like conductivity and combination of correlated and free electron nature. This study focuses on a series of CaV1-xMoxO3-delta solid solutions, particularly near the Mo concentration x = 0.4, where a subtle structural transition was previously detected. The use of high-resolution transmission electron microscopy revealed phase separation in CaV0.6Mo0.4O3-delta, with nanoscale regions exhibiting different ratios of V and Mo concentrations, despite a homogeneous perovskite structure observed in X-ray diffraction analysis. Changes in oxygen activity also led to nonmonotonic behavior in the conductivity and linear expansion of CaV1-xMoxO3 +/-delta, which can be attributed to partial decomposition of the perovskite phase.
Article
Materials Science, Ceramics
V. A. Vorotnikov, S. A. Belyakov, M. S. Plekhanov, A. Yu Stroeva, A. S. Lesnichyova, O. M. Zhigalina, D. N. Khmelenin, V. G. Basu, A. V. Kuzmin
Summary: Proton-conducting electrolytes based on pyrochlore-like zirconates have excellent thermal and chemical stability, but their proton conductivity is hindered by structural limitations and grain boundaries. Improving the grain boundaries could enhance the proton conductivity.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Andrey Bushuev, Oleg El'kin, Ivan Tolstobrov, Yulia Chetvertnykh, Mark Bobro, Nailya Saetova, Anton Kuzmin
Summary: This study proposes a method to produce heat-resistant protective coatings for 08Kh17T stainless steel, which can serve as interconnect materials for solid oxide fuel cells. The method involves layer-by-layer precipitation of nickel, cobalt, and manganese, followed by heat treatment in a vacuum and oxidizing atmosphere. XRD analysis reveals that the coatings consist of a mixture of metal oxides and compounds with a spinel structure. The obtained coatings exhibit excellent resistance to high-temperature oxidation for 100 hours, with the coating having a cobalt to manganese layer thickness ratio of 1.5/0.5 μm obtained through electrodeposition showing the highest stability. The specific electrical resistance of this coating after 100 hours of exposure at 850 degrees Celsius is 3.50 x 10(-3) omega cm(2), which meets the requirements for SOFC interconnect materials.
Article
Materials Science, Ceramics
Alyona Vepreva, Dmitry Dubovtsev, Daria Krainova, Yulia Chetvertnykh, Semyon Belyakov, Nailya Saetova, Anton Kuzmin
Summary: The effect of partial substitution of SiO2 with Al2O3 and B2O3 on the thermal properties and crystallization of glass sealants was investigated. The results showed that the thermal expansion coefficient of the sealants falls within a certain range, with alumina-doped sealants exhibiting crystallization and boron oxide-containing sealants remaining amorphous. The interaction between the sealants and YSZ ceramics did not significantly affect their adhesion and properties.
CERAMICS-SWITZERLAND
(2023)
Article
Chemistry, Applied
D. A. Krainova, N. S. Saetova, A. S. Farlenkov, S. A. Belyakov, A. Kuz'min
Summary: The addition of Cr2O3 can improve the thermal properties and chemical stability of glass sealant, making it suitable for solid oxide fuel cells.
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
(2021)