Article
Chemistry, Physical
E. Pikalova, N. Bogdanovich, A. Kolchugin, L. Ermakova, A. Khrustov, A. Farlenkov, D. Bronin
Summary: The methods to increase electrochemical activity and stability of air electrodes based on LNF and SDC have been developed. The optimized electrodes exhibit good electrode performance and low degradation rate, maintaining a low polarization resistance level even after long-term testing.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
R. K. Lenka, P. K. Patro, Vivek Patel, L. Muhmood, T. Mahata
Summary: This study extensively investigates the functional properties of Nd2NiO4+delta based materials doped with different alkaline earth metal ions for SOFC applications. Results show that at high temperatures, materials doped with Ca and Sr exhibit higher electrical conductivity compared to undoped materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Chuangang Yao, Jixing Yang, Haixia Zhang, Xiaoshi Lang, Kedi Cai
Summary: The Ca-doped perovskite oxide PBCCCO was investigated as an SOFC cathode material. Ca doping significantly enhanced the electrical conductivity and electrochemical catalytic activity of the material, resulting in reduced ASR values.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
E. Pikalova, N. Bogdanovich, A. Kolchugin, K. Shubin, L. Ermakova, N. Eremeev, A. Farlenkov, A. Khrustov, E. Filonova, V. Sadykov
Summary: In this study, bilayer composite electrodes based on LNF electronic conductor and Bi2O3-based electrolytes doped with Er and Y have been developed and their performance has been investigated under different electrolyte content and sintering conditions. The optimized electrodes showed polarization resistance in the range of 0.65-1.09 Omega cm(2) at 600 degrees C and 0.10-0.12 Omega cm(2) at 700 degrees C, with significantly improved performance compared to standard platinum cathodes in single cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Crystallography
Nusrat Shaheen, Zheng Chen, Yumei Nong, Tao Su, Muhammad Yousaf, Yuzheng Lu, Ling Li
Summary: Ba2+ and Bi3+ are doped into LaFeO3 and it is found that La1-2xBaxBixFeO3 (x = 0.1) exhibits enriched surface oxygen vacancies compared to La1-2xBaxBixFeO3 (x = 0.2), resulting in lower electrode polarization resistance and higher peak power density. This study confirms that LBBF cathode-based solid oxide fuel cells can operate at low temperatures.
Article
Energy & Fuels
Chuangang Yao, Jixing Yang, Haixia Zhang, Sigeng Chen, Jian Meng, Kedi Cai
Summary: The study found that Cu doping has a favorable effect on the electrochemical activity of SrFe0.9-xCuxMo0.1O3-delta, reducing oxygen content and being chemically compatible with LSGM electrolyte, but TEC values are still relatively high.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
K. A. Kuterbekov, K. Zh Bekmyrza, N. K. Aidarbekov, A. Nikonov, N. B. Pavzderin, V. R. Khrustov, I. Semenova, A. Medvedev, O. Gyrdasova
Summary: The potential of Ruddlesden-Popper-type La2NiO4+delta oxide cathode for solid oxide fuel cell applications was investigated with doping Co. Results showed that thermal expansion coefficient increases with Co content, while conductivity varies at different temperatures. The polarization resistance of cathodes in contact with different electrolytes is related to the Co content.
SOLID STATE IONICS
(2021)
Article
Chemistry, Physical
C. M. Harrison, B. J. M. Sarruf, D. Klotz, P. R. Slater, R. Steinberger-Wilckens
Summary: This paper investigates the effect of sintering temperature on the performance of the Ruddlesden-Popper phase La2NiO4+delta as a Solid Oxide Fuel Cell cathode material. The study shows that increasing the sintering temperature leads to a significant improvement in electrode performance. It is also found that adding a noble metal contacting layer can dramatically enhance the performance of the LNO214 electrode. These findings have important implications for SOFC testing methodologies.
SOLID STATE IONICS
(2023)
Article
Chemistry, Physical
Kaige Tian, Lan Wu, Huan Chai, Lili Gao, Meng Wang, Huilin Niu, Li Chen, Jun Jin
Summary: In order to improve the electron-hole recombination rate and water oxidation reaction kinetics in photoelectrochemical (PEC) water splitting, we prepared Ni2P2O7-Nd-BiVO4 composite photoanodes through photo-assisted electrodeposition. The Ni2P2O7-Nd-BiVO4 photoanode exhibited a high photocurrent density at 1.23 reversible hydrogen electrode (RHE) and the Ni2P2O7 co-catalyst played multiple roles in accelerating hole migration, inhibiting electron recombination, and improving water oxidation kinetics. This work provides ideas for the design and study of efficient BiVO4-based photoanodes.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Chengzhi Sun, Yu Kong, Yongchao Niu, Xiaoju Yin, Naiqing Zhang
Summary: As a classical family of high-performance cathode materials, mixed ionic and electronic conductor (MIEC) is crucial for the low-temperature operation and high efficiency of solid oxide fuel cells. While Fe-based double perovskites have advantages of low cost, good thermal compatibility with the electrolyte, and high-temperature stability, their electrochemical properties for oxygen reduction reaction are unsatisfactory. This study demonstrates that substituting Zr for Fe in NdBaFe2O6??Δ (NBF) lattice can enhance oxygen vacancy concentration and the position of O p-band center, leading to improved oxygen reduction performance for the Zr-doped NBF cathode.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
E. Pikalova, N. Eremeev, E. Sadovskaya, V Sadykov, V Tsvinkinberg, N. Pikalova, A. Kolchugin, A. Vylkov, I Baynov, E. Filonova
Summary: This study investigates the properties of La2NiO4+delta (LNO) substituted with rare earth elements and their effects on oxygen transport and electrochemical properties. The results show that substitution with rare earth elements can increase the oxygen over-stoichiometry and improve the oxygen transport properties of LNO, thus enhancing the electrochemical performance of the related electrodes.
SOLID STATE IONICS
(2022)
Article
Engineering, Electrical & Electronic
Chengzi Huang, Jackson Anderson, Samuel Peana, Xuegang Chen, Shriram Ramanathan, Dana Weinstein
Summary: Micro-robotics is a promising field with potential applications in various areas, where efficient actuator materials play a critical role. This study introduces thin films of NdNiO3 as a potential material for MEMS actuation, demonstrating high tensile volumetric strain and output power.
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
(2021)
Article
Crystallography
Elena Pikalova, Vladislav Sadykov, Ekaterina Sadovskaya, Nikita Yeremeev, Alexander Kolchugin, Alexander Shmakov, Zakhar Vinokurov, Denis Mishchenko, Elena Filonova, Vladimir Belyaev
Summary: This study investigates the structure and transport properties of Ca-doped La2NiO4+delta materials and reveals the impact of Ca content on the materials' characteristics. Different crystal structures and oxygen mobilities were observed for materials with varying levels of calcium, affecting the oxygen transport properties.
Article
Chemistry, Physical
Bin Qian, Chaohang Liu, Shun Wang, Bo Yin, Yifeng Zheng, Lin Ge, Han Chen, Caizhi Zhang
Summary: The paper introduces a novel cathode material Ca-0.05-LSCM/GDC for CO2 electrolysis, which is of great significance for improving the electrochemical performance of SOECs. Experimental results show that this cathode exhibits low electrode polarization resistance under high temperature and pressure, and demonstrates good stability in a pure CO2 atmosphere.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Naveed Mushtaq, Yuzheng Lu, Chen Xia, Wenjing Dong, Baoyuan Wang, Xunying Wang, M. A. K. Yousaf Shah, Sajid Rauf, Nie Jingjing, Enyi Hu, Haibo Xiao, Rizwan Raza, Jung-Sik Kim, Bin Zhu
Summary: This study presents the design and performance of BSFSb cathodes in enhancing the oxygen reduction reaction activity and power output. The doping of Sb ions significantly improves electrical conductivity and lowers the ORR activation energy.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Elena Yu Pikalova, Larisa V. Ermakova, Maxim I. Vlasov
Summary: This work obtained and studied materials with a Ce0.8Sm0.2O1.9-(3x)/2F3x series fluorite structure for the first time. The materials were synthesized using solid-phase interaction of SmF3 with a highly dispersed precursor obtained in reactions of solution combustion synthesis of cerium and samarium nitrates with a mixture of glycine and citric acid. The materials in the range of 0.01 ≤ x ≤ 0.1 exhibited a cubic structure with a decrease in unit cell parameter. Raman spectra analysis confirmed the presence of fluorine in the materials and showed changes in the Raman peaks. The fluorine-doped material with x = 0.10 showed the highest conductivity and electrolyte domain boundary value, indicating its potential application in solid oxide fuel cell technology.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Elena G. Kalinina, Darya S. Rusakova, Kirill S. Shubin, Larisa V. Ermakova, Elena Yu. Pikalova
Summary: This study investigates the direct electrophoretic deposition (EPD) of thin-film Ce0.8Sm0.2O1.9 (SDC) electrolyte on porous nonconductive NiO-BaCe0.8Sm0.2O3 (BCS) and NiO-SDC substrates. The addition of Co3O4, TiO2, and Al2O3 oxides in the suspensions improves the electrolyte sintering. The introduction of nanosized SDC powder into the suspensions achieves high zeta potential values for stable deposition. Dense composite electrolyte membranes are obtained after sintering, and the influence of sintering additives on the electrical properties of the films are studied.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Sergey V. Naumov, Maxim I. Vlasov, Elena Yu. Pikalova, Victor A. Tsvinkinberg, Olga G. Reznitskikh, Elena A. Filonova
Summary: Neodymium nickelates Nd2Ni1-xO4+delta with a wide range of Ni non-stoichiometry (x=0.0-0.08) are synthesized and their properties are studied. The XRD data shows that the materials in the x range of 0.0-0.06 have a single-phase orthorhombic structure with a Fmmm space group. TGA-DSC studies reveal that the phase transition temperature does not depend on Ni non-stoichiometry. Raman scattering studies show that at low Ni deficiency the Raman spectra are typical for the Ni-stoichiometric oxidized Nd2NiO4+(delta), while at x=0.06, lattice disorder and octahedral distortions reach a maximum feasibility.
SOLID STATE IONICS
(2023)
Article
Materials Science, Multidisciplinary
Elena Kalinina, Larisa Ermakova, Elena Pikalova
Summary: In this study, thin-film barrier coatings based on Bi1.60Er0.4O3 solid electrolyte were formed on Ce0.8Sm0.2O1.9 electrolyte substrates using electrophoretic deposition (EPD) for the first time. The electrokinetic properties of EDB-based suspensions in different dispersion media were studied, and the effects of voltage and deposition time on coating thickness were investigated. A conductive polymer film was synthesized to enhance the conductivity of non-conductive substrates. The study demonstrated the feasibility of using EPD to create continuous EDB coatings for potential applications in cathode barrier layers in SOFC technology.
Review
Green & Sustainable Science & Technology
Artem P. Tarutin, Elena A. Filonova, Sandrine Ricote, Dmitry A. Medvedev, Zongping Shao
Summary: Solid oxide fuel cells (SOFCs) and electrolysis cells (SOECs) have the potential for hydrogen and low-carbon energy, aligning with the transition to alternative energy policies. These devices utilize various energy conversion processes, including conventional hydrogen utilization and water electrolysis, as well as novel approaches like CO2 electrolysis and non-oxidative hydrocarbon conversion. Different combinations of electrolytes and electrodes support these processes, enabling electrochemical oxidation and reduction. In this review, structural and chemical strategies to enhance the electrochemical performance of oxygen electrodes at reduced temperatures are discussed. The use of simple perovskite structures, layered derivatives, and modifications of complex oxides are explored as efficient ways to design modernized compositions of oxygen electrodes.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Biochemistry & Molecular Biology
Elena Pikalova, Elena Kalinina
Summary: This study introduces a thin anode barrier layer of BaCe0.8Sm0.2O3 + 1 wt% CuO (BCS-CuO) electrolyte and a modifying layer of Ce0.8Sm0.1Pr0.1O1.9 (PSDC) electrolyte to increase the performance of a single solid oxide fuel cell (SOFC) with a supporting membrane of Ce0.8Sm0.2O1.9 (SDC) electrolyte. The electrophoretic deposition (EPD) method is used to form thin electrolyte layers on a dense supporting membrane. The power output of the SOFC cell is increased by reducing the ohmic and polarization resistances of the cell with the BCS-CuO/SDC/PSDC electrolyte membrane.
Article
Chemistry, Physical
Elena G. Kalinina, Elena Yu. Pikalova
Summary: This work aims to form dense anode coatings of yttria-stabilized zirconia (YSZ) and samarium-doped barium cerate (BCS) on the Ce0.8Sm0.2O2- electrolyte to improve the performance of a single fuel cell. Various methods, such as precipitation, laser vaporization condensation, and citrate-nitrate method, were used to obtain YSZ and BCS materials. The study reveals the challenges in forming dense YSZ layers on SDC substrates due to delamination during high-temperature sintering, which can be alleviated by the use of a Pt buffer sublayer. The compatibility of BCS barrier layers with SDC was also demonstrated.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
A. Urusova, A. Bryuzgina, E. Solomakhina, A. Kolchugin, D. Malyshkin, E. Pikalova, E. Filonova
Summary: This study investigates the functional properties of yttrium-doped Ca3Co4O9+3 complex oxides as potential cathode materials for proton-conducting fuel cells. The phase equilibria in the 1/2Y2O3-CaO-1/3Co3O4 system at 900℃ in air has been experimentally observed. The misfit-layered structure of Ca3-kYkCo4O9+3 solid solutions and their chemical compatibility with proton-conducting electrolytes have been established.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Elena Pikalova, Alexander Kolchugin, Victor Tsvinkinberg, Vladimir Sereda, Anton Khrustov, Elena Filonova
Summary: This study compares the oxygen content, thermal expansion, electrical conductivity, and electrochemical performance of La(1.6)Ln(0.4)NiO(4+delta) complex oxides. The highest conductivity is found in the La1.6Sm0.4NiO4+delta sample. The stability of the electrode structure is demonstrated by scanning electron microscopy. The La1.6Eu0.4NiO4+delta electrode shows the minimum polarization resistance.
JOURNAL OF POWER SOURCES
(2023)
Correction
Chemistry, Physical
Elena Filonova, Elena Pikalova
Review
Chemistry, Physical
Elena Filonova, Elena Pikalova
Summary: The development of low-cost, commercially competitive solid oxide fuel cells with reduced operating temperatures is closely related to the search for new functional materials and technologies to improve the properties of established materials. Efforts are being made to improve air electrodes, which contribute to the degradation of cell performance at reduced temperatures. This review summarizes methods to improve the electrochemical performance of conventional air electrodes and provides background information for further development of electrode modification technologies.
Review
Biochemistry & Molecular Biology
Vladislav Sadykov, Elena Pikalova, Ekaterina Sadovskaya, Anna Shlyakhtina, Elena Filonova, Nikita Eremeev
Summary: Oxygen and hydrogen mobility are important characteristics for the operation of electrochemical devices, and this work focuses on studying the diffusion of mixed ionic-electronic conducting materials and its role in device performance. The main laws of bulk diffusion and surface exchange are highlighted, and isotope exchange techniques are used to study these processes in detail. Ionic transport properties of various conventional and state-of-the-art materials are reviewed.
Article
Electrochemistry
V. A. Sadykov, E. M. Sadovskaya, N. F. Eremeev, T. Yu. Maksimchuk, S. M. Pikalov, E. A. Filonova, N. S. Pikalova, A. R. Gilev, E. Yu. Pikalova
Summary: The structure, oxygen mobility, and electrochemical characteristics of La1.7Ca0.3Ni1 -xCuxO4 + delta (x = 0-0.4) materials were studied. The materials showed single-phase tetragonal structure with increased cell parameter c and volume upon copper doping. Oxygen mobility decreased with higher copper content. Impedance spectroscopy studies revealed higher electrochemical activity in electrodes with La1.7Ca0.3Ni1 -xCuxO4 + delta functional layers and copper content x > 0.2. La1.7Ca0.3Ni0.6Cu0.4O4 + delta materials are potential candidates for air electrodes in electrochemical devices.
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
(2023)