Готові списки джерел за темами / Nickelate Perovskites

Добірка наукової літератури з теми "Nickelate Perovskites"

Автор: Grafiati

Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Nickelate Perovskites"

Wang, Xiaoli, Shilei Wang, Chao Liu, Chuanyan Fan, Lu Han, Feiyu Li, Tieyan Chang, et al. "High pO2 Flux Growth and Characterization of NdNiO3 Crystals." Crystals 13, no. 2 (January 19, 2023): 180. http://dx.doi.org/10.3390/cryst13020180.

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Single crystals of the perovskite nickelate NdNiO3 with dimensions of up to 50 μm on edge have been successfully grown using the flux method at a temperature of 400 °C and oxygen pressure of 200 bar. The crystals were investigated by a combination of techniques, including high-resolution synchrotron X-ray single-crystal and powder diffraction and physical property measurements such as magnetic susceptibility and resistivity. Resistivity measurements revealed a metal-insulator transition (MIT) at TMIT~180 K with apparent thermal hysteresis; however, no superlattice peaks or peak splitting below TMIT, which corresponds to a structural transition from Pbnm to P21/n, was observed. The successful growth of NdNiO3 crystals at relatively low temperatures and oxygen pressure provides an alternative approach for preparing single crystals of interesting perovskites such as RNiO3 (R = Sm-Lu) and parent phases of superconducting square planar nickelates.

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Tarutin, Artem, Anna Kasyanova, Gennady Vdovin, Julia Lyagaeva та Dmitry Medvedev. "Nickel-Containing Perovskites, PrNi0.4Fe0.6O3–δ and PrNi0.4Co0.6O3–δ, as Potential Electrodes for Protonic Ceramic Electrochemical Cells". Materials 15, № 6 (15 березня 2022): 2166. http://dx.doi.org/10.3390/ma15062166.

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Protonic ceramic fuel cells (PCFCs) offer a convenient means of converting chemical energy into electricity with high performance and efficiency at low- and intermediate-temperature ranges. However, in order to ensure good life-time stability of PCFCs, it is necessary to ensure rational chemical design in functional materials. Within the present work, we propose new Ni-based perovskite phases of PrNi0.4M0.6O3–δ (where M = Co, Fe) for potential utilization in protonic ceramic electrochemical cells. Along with their successful synthesis, functional properties of the PrNi0.4M0.6O3–δ materials, such as chemical compatibility with a number of oxygen-ionic and proton-conducting electrolytes, thermal expansion behavior, electrical conductivity, and electrochemical behavior, were comprehensively studied. According to the obtained data, the Co-containing nickelate exhibits excellent conductivity and polarization behavior; on the other hand, it demonstrates a high reactivity with all studied electrolytes along with elevated thermal expansion coefficients. Conversely, while the iron-based nickelate had superior chemical and thermal compatibility, its transport characteristics were 2–5 times worse. Although, PrNi0.4Co0.6O3–δ and PrNi0.4Fe0.6O3–δ represent some disadvantages, this work provides a promising pathway for further improvement of Ni-based perovskite electrodes.

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Zhang, Zhen, Yifei Sun, and Hai-Tian Zhang. "Quantum nickelate platform for future multidisciplinary research." Journal of Applied Physics 131, no. 12 (March 28, 2022): 120901. http://dx.doi.org/10.1063/5.0084784.

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Perovskite nickelates belong to a family of strongly correlated materials, which have drawn broad attention due to their thermally induced metal-to-insulator transition. Recent discoveries show that orbital filling mediated by ion intercalation can trigger a colossal non-volatile conductivity change in nickelates. The coupling and interaction between two types of charge carriers (i.e., ions and electrons) enable nickelate as an exotic mixed conductor for electronic, biological, and energy applications. In this Perspective, we first summarize the fundamentals and recent progresses in the manipulation of ground states of perovskite nickelates by controlling orbital filling via ion intercalation. Then, we present a comprehensive overview of perovskite nickelate as a unique platform for vast cutting-edge research fields, including neuromorphic computing, bio-electronic interfaces, as well as electrocatalysis applications by taking advantage of such electron-filling-controlled modulation phenomena. Finally, we provide an overview of future perspectives and remaining challenges toward the exploitation and commercialization of quantum nickelates for future multidisciplinary research.

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Li, Yueying, Xiangbin Cai, Wenjie Sun, Jiangfeng Yang, Wei Guo, Zhengbin Gu, Ye Zhu, and Yuefeng Nie. "Synthesis of Chemically Sharp Interface in NdNiO₃/SrTiO₃ Heterostructures." Chinese Physics Letters 40, no. 7 (June 1, 2023): 076801. http://dx.doi.org/10.1088/0256-307x/40/7/076801.

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The nickel-based superconductivity provides a fascinating new platform to explore high-T c superconductivity. As the infinite-layer nickelates are obtained by removing the apical oxygens from the precursor perovskite phase, the crystalline quality of the perovskite phase is crucial in synthesizing high quality superconducting nickelates. Especially, cation-related defects, such as the Ruddlesden–Popper-type (RP-type) faults, are unlikely to disappear after the topotactic reduction process and should be avoided during the growth of the perovskite phase. Herein, using reactive molecular beam epitaxy, we report the atomic-scale engineering of the interface structure and demonstrate its impact in reducing crystalline defects in Nd-based nickelate/SrTiO3 heterostructures. A simultaneous deposition of stoichiometric Nd and Ni directly on SrTiO3 substrates results in prominent Nd vacancies and Ti diffusion at the interface and RP-type defects in nickelate films. In contrast, inserting an extra [NdO] monolayer before the simultaneous deposition of Nd and Ni forms a sharp interface and greatly eliminates RP-type defects in nickelate films. A possible explanation related to the polar discontinuity is also discussed. Our results provide an effective method to synthesize high-quality precursor perovskite phase for the investigation of the novel superconductivity in nickelates.

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Moriga, T. "Reduction processes of rare-earth nickelate perovskites LnNiO3 (Ln=La, Pr, Nd)." Solid State Ionics 154-155 (December 2, 2002): 251–55. http://dx.doi.org/10.1016/s0167-2738(02)00440-x.

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Campi, Gaetano, Nicola Poccia, Boby Joseph, Antonio Bianconi, Shrawan Mishra, James Lee, Sujoy Roy, et al. "Direct Visualization of Spatial Inhomogeneity of Spin Stripes Order in La1.72Sr0.28NiO4." Condensed Matter 4, no. 3 (August 10, 2019): 77. http://dx.doi.org/10.3390/condmat4030077.

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In several strongly correlated electron systems, the short range ordering of defects, charge and local lattice distortions are found to show complex inhomogeneous spatial distributions. There is growing evidence that such inhomogeneity plays a fundamental role in unique functionality of quantum complex materials. La1.72Sr0.28NiO4 is a prototypical strongly correlated perovskite showing spin stripes order. In this work we present the spatial distribution of the spin order inhomogeneity by applying micro X-ray diffraction to La1.72Sr0.28NiO4, mapping the spin-density-wave order below the 120 K onset temperature. We find that the spin-density-wave order shows the formation of nanoscale puddles with large spatial fluctuations. The nano-puddle density changes on the microscopic scale forming a multiscale phase separation extending from nanoscale to micron scale with scale-free distribution. Indeed spin-density-wave striped puddles are disconnected by spatial regions with negligible spin-density-wave order. The present work highlights the complex spatial nanoscale phase separation of spin stripes in nickelate perovskites and opens new perspectives of local spin order control by strain.

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Konysheva, Elena, and John T. S. Irvine. "Evolution of conductivity, structure and thermochemical stability of lanthanum manganese iron nickelate perovskites." Journal of Materials Chemistry 18, no. 42 (2008): 5147. http://dx.doi.org/10.1039/b807145d.

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John, Rohit Abraham. "An adaptive device for AI neural networks." Science 375, no. 6580 (February 4, 2022): 495–96. http://dx.doi.org/10.1126/science.abn6196.

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Huang, Chengzi, Jackson Anderson, Samuel Peana, Xuegang Chen, Shriram Ramanathan, and Dana Weinstein. "Perovskite Nickelate Actuators." Journal of Microelectromechanical Systems 30, no. 3 (June 2021): 488–93. http://dx.doi.org/10.1109/jmems.2021.3067189.

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Han, Yujie, Zhijun Zhu, Liang Huang, Yujing Guo, Yanling Zhai, and Shaojun Dong. "Hydrothermal synthesis of polydopamine-functionalized cobalt-doped lanthanum nickelate perovskite nanorods for efficient water oxidation in alkaline solution." Nanoscale 11, no. 41 (2019): 19579–85. http://dx.doi.org/10.1039/c9nr06519a.

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Дисертації з теми "Nickelate Perovskites"

Diop, Ngom Balla. "Structural and physical properties of ReN i03 (Re=Sm, N d) nanostructured films prepared by Pulsed Laser Deposition." University of the Western Cape, 2010. http://hdl.handle.net/11394/8229.

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Philosophiae Doctor - PhD
Very few systems allow the study of the relationship between structural changes and physical properties in such a clear way as rare earth nickelate ReNi03 perovskites (Re (rare earth) = Pr, Nd, Sm and Gd). Synthesized for the first time by Demazeau et al [1] in 1971 and completely forgotten for almost twenty years, these compounds have regained interest since the discovery of high-temperature superconductivity and giant magnetoresistive effects in other perovskite-related systems. Due to its Metal-Insulator Transition (MIT) and thermochromic properties, the rare earth nickelate perovskite ReNi03 has received a great deal of attention for the past ten years in their thin films form [12]. Such unusual electronic and optical features are all the more interesting since the metal-insulator transition temperature (TMn) can be tuned by changing the Re cation: LaNi03 is metallic. No minimum of the metallic conductivity of Sm0 . ssNd 0.45Ni03, as observed by Gire et al [12] (entropic effect), was reported by Ambrosini and Hamet [11]. It has been suggested by Obradors et al. [13] that changing the rare earth cation in the ReNi03 system, acts as internal chemical pressure (increasing internal pressure by substituting the rare earth cation with another one of larger ionic radius) which can lead, as for the isostatic pressure experiment, to a tunability of the metal-insulator transition temperature [14, 15]. Obradors et al [13] reported on a decrease of T MIT upon increasing isostatic pressure but with remaining metallic properties of PrNi03 and NdNi03 (same magnitude and thermal dependence of the electrical resistivity)

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Shaw, Cynthia Kit Man. "Mass transport in mixed conducting perovskite related oxides." Thesis, Imperial College London, 2001. http://hdl.handle.net/10044/1/8380.

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Sousa, Karla Silvana Menezes Gadelha de. "S?ntese e caracteriza??o de catalisadores nanom?tricos de LaSrNiO4 para aplica??o em dessulfuriza??o de tiofeno." Universidade Federal do Rio Grande do Norte, 2009. http://repositorio.ufrn.br:8080/jspui/handle/123456789/12734.

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Made available in DSpace on 2014-12-17T14:07:01Z (GMT). No. of bitstreams: 1 KarlaSMGS_partes_autorizadas_pelo_autor.pdf: 1248832 bytes, checksum: 6139c9f98f965322e719dfe4f7274a99 (MD5) Previous issue date: 2009-03-13
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The mixed metal oxides constitute an important class of catalytic materials widely investigated in different fields of applications. Studies of rare earth nickelates have been carried by several researchers in order to investigate the structural stability afforded by oxide formed and the existence of catalytic properties at room temperature. So, this study aims synthesize the nanosized catalyst of nickelate of lanthanum doped with strontium (La(1-x)SrxNiO4-d; x = 0,2 and 0,3), through the Pechini method and your characterization for subsequent application in the desulfurization of thiophene reaction. The precursor solutions were calcined at 300?C/2h for pyrolysis of polyester and later calcinations occurred at temperatures of 500 - 1000?C. The resulting powders were characterized by thermogravimetric analysis (TG / DTG), surface area for adsorption of N2 by BET method, X-ray diffraction (XRD), scanning electron microscopy (HR_SEM) and spectrometry dispersive energy (EDS). The results of XRD had show that the perovskites obtained consist of two phases (LSN and NiO) and from 700?C have crystalline structure. The results of SEM evidenced the obtainment of nanometric powders. The results of BET show that the powders have surface area within the range used in catalysis (5-50m2/g). The characterization of active sites was performed by reaction of desulfurization of thiophene at room temperature and 200?C, the relation F/W equal to 0,7 mol h-1mcat -1. The products of the reaction were separated by gas chromatography and identified by the selective detection PFPD sulfur. All samples had presented conversion above 95%
Os ?xidos met?licos mistos constituem uma importante classe de materiais catal?ticos mundialmente investigados em diferentes campos de aplica??es. Estudos envolvendo niquelatos de terras raras v?m sendo realizados por v?rios pesquisadores no intuito de investigar a estabilidade proporcionada pelo ?xido estrutural formado e a exist?ncia de propriedades catal?ticas, ? temperatura ambiente. Neste contexto, este trabalho tem como objetivo a s?ntese do catalisador nanom?trico de niquelato de lant?nio dopado com estr?ncio (La(1-x)SrxNiO4-d; x = 0,2 e 0,3), atrav?s do m?todo Pechini e caracteriza??o para posterior aplica??o em rea??o de dessulfuriza??o de tiofeno. As solu??es precursoras foram calcinadas a 300?C/2h, para pir?lise do poli?ster e posteriores calcina??es foram realizadas nas temperaturas entre 500 - 1000?C. Os p?s resultantes foram caracterizados por an?lise termogravim?trica (TG/DTG), ?rea superficial por adsor??o de N2 pelo m?todo BET, difra??o de raios x (DRX), microscopia eletr?nica de varredura de alta resolu??o (HR_MEV) e espectroscopia por energia dispersiva (EDS). Com os dados de an?lise t?rmica, foi poss?vel definir as temperaturas e calores envolvidos no processo de decomposi??o dos ?xidos finais. Os resultados de DRX mostraram que as perovisquitas obtidas s?o constitu?das de duas fases (LSN e NiO) e a partir de 700?C apresentaram estrutura cristalina. Os resultados de MEV evidenciaram a obten??o de p?s nanom?tricos. Os resultados de BET mostraram que os p?s obtidos apresentam ?rea superficial dentro da faixa utilizada em cat?lise (5-50m2/g). A caracteriza??o dos s?tios ativos foi realizada atrav?s da rea??o de dessulfuriza??o de tiofeno ? temperatura ambiente e a 200oC, com raz?o F/W igual a 0,7molh-1mcat -1. Os produtos da rea??o foram separados por cromatografia em fase gasosa e identificados por detec??o PFPD seletivo a enxofre. Todas as amostras apresentaram convers?o acima de 95%

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Cetin, Deniz. "Thermodynamic stability of perovskite and lanthanum nickelate-type cathode materials for solid oxide fuel cells." Thesis, 2016. https://hdl.handle.net/2144/19501.

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The need for cleaner and more efficient alternative energy sources is becoming urgent as concerns mount about climate change wrought by greenhouse gas emissions. Solid oxide fuel cells (SOFCs) are one of the most efficient options if the goal is to reduce emissions while still operating on fossil energy resources. One of the foremost problems in SOFCs that causes efficiency loss is the polarization resistance associated with the oxygen reduction reaction(ORR) at the cathodes. Hence, improving the cathode design will greatly enhance the overall performance of SOFCs. Lanthanum nickelate, La2NiO4+δ (LNO), is a mixed ionic and electronic conductor that has competitive surface oxygen exchange and transport properties and excellent electrical conductivity compared to perovskite-type oxides. This makes it an excellent candidate for solid oxide fuel cell (SOFC) applications. It has been previously shown that composites of LNO with Sm0.2Ce0.8O2-δ (SDC20) as cathode materials lead to higher performance than standalone LNO. However, in contact with lanthanide-doped ceria, LNO decomposes resulting in free NiO and ceria with higher lanthanide dopant concentration. In this study, the aforementioned instability of LNO has been addressed by compositional tailoring of LNO: lanthanide doped ceria (LnxCe1-xO2,LnDC)composite. By increasing the lanthanide dopant concentration in the ceria phase close to its solubility limit, the LNO phase has been stabilized in the LNO:LnDC composites. Electrical conductivity of the composites as a function of LNO volume fraction and temperature has been measured, and analyzed using a resistive network model which allows the identification of a percolation threshold for the LNO phase. The thermomechanical compatibility of these composites has been investigated with SOFC systems through measurement of the coefficients of thermal expansion. LNO:LDC40 composites containing LNO lower than 50 vol%and higher than 40 vol% were identified as being suitable to incorporate into full button cell configuration from the standpoint of thermomechanical stability and adequate electrical conductivity. Proof-of-concept performance comparison for SOFC button cells manufactured using LNO: La0.4Ce0.6O2-δ composite to the conventional composite cathode materials has also been provided. This thermodynamics-based phase stabilization strategy can be applied to a wider range of materials in the same crystallographic family, thus providing the SOFC community with alternate material options for high performance devices.

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Частини книг з теми "Nickelate Perovskites"

Kovalevsky, A., V. Kharton, E. Naumovich, F. Marques, and J. Frade. "Ionic Transport in Perovskite-Related Mixed Conductors: Ferrite-, Cobaltite-, Nickelate-, and Gallatebased Systems." In Mixed Ionic Electronic Conducting Perovskites for Advanced Energy Systems, 109–22. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2349-1_9.

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Zyrin, A. V., T. N. Bondarenko, I. V. Urubkov, and V. N. Uvarov. "Conductivity and Electronic Structure of Lanthanum Nickelites." In Mixed Ionic Electronic Conducting Perovskites for Advanced Energy Systems, 295–301. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2349-1_29.

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V. Kalinina, Marina, Daria A. Dyuskina, Irina G. Polyakova, Sergey V. Mjakin, Maxim Yu. Arsent’ev, and Olga A. Shilova. "Synthesis and Investigation of Ceramic Materials for Medium-Temperature Solid Oxide Fuel Cells." In Smart and Advanced Ceramics and Applications [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.105108.

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Finely dispersed (СeO2)1-x(Sm2O3)x (x = 0.02; 0.05; 0.10); La1-xSrxNiO3, La1-xSrxCoO3 and La1-xSrxFe0.7Ni0.3O3 (x = 0.30; 0.40) mesoporous xerogel powders are synthesized by co-crystallization of the corresponding nitrates with ultrasonic processing and used to obtain nanoscale ceramic materials with cubic fluorite-like, orthorhombic, and perovskite-like tetragonal crystal structure, respectively, with CSR ∼ 64–81 nm (1300°C). Physicochemical characterization of the obtained ceramics revealed that (СeO2)1-x(Sm2O3)x features with open porosity 2–6%, while for La1-xSrxNiO3, La1-xSrxCoO3, and La1-xSrxFe0.7Ni0.3O3, this value is about 21–29%. Ceria-based materials possess a predominantly ionic conductivity (ion transport numbers ti = 0.82–0.71 in the temperature range 300–700°C, σ700°С = 1.3·10−2 S/cm) determined by the formation of mobile oxygen vacancies upon heterovalent substitution of Sm3+ for Се4+. For solid solutions based on lanthanum nickelate and cobaltite, a mixed electronic-ionic conductivity (σ700°С = 0.80·10−1 S/cm) with ion transport numbers (te = 0.98–0.90, ti = 0.02–0.10) was obtained. The obtained ceramic materials are shown to be promising as solid oxide electrolytes and electrodes for medium-temperature fuel cells.

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Тези доповідей конференцій з теми "Nickelate Perovskites"

Misjak, Fanni. "Interfacial effects in nickelate-based perovskite heterostructures." In European Microscopy Congress 2020. Royal Microscopical Society, 2021. http://dx.doi.org/10.22443/rms.emc2020.370.

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Lassman, Alexander, Alevtina Smirnova, and Nigel Sammes. "An Investigation of Doped Perovskites Based on La, Pr, and Sm Ferrites as Cathode Materials for Solid Oxide Fuel Cells." In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65153.

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Perovskites with the composition ABO3 have been studied as cathode candidate materials for solid oxide fuel cells. Both the A and B sites can be doped. This paper investigates ABO3 perovskites in which the A site ion is lanthanum (La), praseodymium (Pr), or samarium (Sm), doped with strontium (Sr). The B site ion is iron (Fe) doped with cobalt (Co) or nickel (Ni). Powders were prepared by the glycine-nitrate process, and were calcined at temperatures between 700°C and 900°C. XRD analysis was performed to determine the effect of calcination temperature on structure. Cathode pellets were made and sintered at 1200°C for 4 hours. The electrical conductivity of these pellets was measured, in ambient air, at temperatures ranging from 200°C to 800°C. The measured conductivity was generally higher for the ferrite-nickelates than the ferrite-cobaltites. Additionally, the samples with lanthanum as the A site cation demonstrated higher electrical conductivity than those with samarium or praseodymium.

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Misra, D., and A. Taraphder. "The ground states of Perovskite nickelates: A dynamical mean field approach." In SOLID STATE PHYSICS: Proceedings of the 58th DAE Solid State Physics Symposium 2013. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4872936.

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Jérémie, Fondard, Briois Pascal, Billard Alain, and Bertrand Ghislaine. "Synthesis and characterization of La2NiO4-d coatings deposited by reactive magnetron sputtering using plasma emission monitoring." In 13th International Conference on Plasma Surface Engineering September 10 - 14, 2012, in Garmisch-Partenkirchen, Germany. Linköping University Electronic Press, 2013. http://dx.doi.org/10.3384/wcc2.188-191.

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It is well known that the short life time and the high cost of each component of nowadays Solid Oxide Fuel Cells (SOFC) are induced by their high operating temperature. Many researches focus on the decrease of this operating temperature without reduction of the fuel cell performances (IT-SOFC). Regarding the cathode, one solution is to increase the electrocatalytic properties. Purely electronic conductor perovskite materials (for example LSM: La1-xSrxMnO3) are used in standard SOFC devices. A2MO4+d compounds, with K2NiF4 structure have recently been investigated as substitutes to LSM. Indeed, these materials are mixed ionic and electronic conductors (MIECs) that moreover exhibit rather high electrocatalytic properties. It is then possible to synthesize them as dense materials for SOFC cathodes. Among these materials, lanthanum nickelates La2NiO4+d exhibits convenient electrochemical characteristics. Its thermal expansion coefficient (TEC) is very close to that of the most commonly used electrolyte materials (13 10-6 K-1, 11.9 10-6 K-1 and 11.6 10-6 K-1 for La2NiO4+d, CeO2-Gd2O3 (CGO) and ZrO2-Y2O3 (YSZ) respectively). Its oxygen ionic conductivity and surface exchange coefficient are interesting and seem much better than those of La1-xSrxMnO3 (LSM) and La1-xSrxCo1-yFeyO3 (LSCF), the most commonly used cathodes.The deposition of La2NiO4 coatings by reactive magnetron sputtering has already successfully been performed under so called stable conditions in a laboratory vessel. In this study, we investigate the feasibility of La2NiO4+d coatings deposited by reactive magnetron sputtering under unstable conditions using Plasma Emission Monitoring (PEM).The chemical composition of the coatings was measured by Scanning Electron Microscopy coupled with Energy Dispersive Spectroscopy. The influence of the La/Ni ratio on the structure was checked by X-Ray Diffraction analyses.

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