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Ingavale S, Gopalakrishnan M, Enoch CM, Pornrungroj C, Rittiruam M, Praserthdam S, Somwangthanaroj A, Nootong K, Pornprasertsuk R, Kheawhom S. Strategic Design and Insights into Lanthanum and Strontium Perovskite Oxides for Oxygen Reduction and Oxygen Evolution Reactions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308443. [PMID: 38258405 DOI: 10.1002/smll.202308443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/25/2023] [Indexed: 01/24/2024]
Abstract
Perovskite oxides exhibit bifunctional activity for both oxygen reduction (ORR) and oxygen evolution reactions (OER), making them prime candidates for energy conversion in applications like fuel cells and metal-air batteries. Their intrinsic catalytic prowess, combined with low-cost, abundance, and diversity, positions them as compelling alternatives to noble metal and metal oxides catalysts. This review encapsulates the nuances of perovskite oxide structures and synthesis techniques, providing insight into pivotal active sites that underscore their bifunctional behavior. The focus centers on the breakthroughs surrounding lanthanum (La) and strontium (Sr)-based perovskite oxides, specifically their roles in zinc-air batteries (ZABs). An introduction to the mechanisms of ORR and OER is provided. Moreover, the light is shed on strategies and determinants central to optimizing the bifunctional performance of La and Sr-based perovskite oxides.
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Affiliation(s)
- Sagar Ingavale
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Mohan Gopalakrishnan
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Carolin Mercy Enoch
- Department of Chemistry, SRM Institute of Science & Technology, Kattankulathur, Chennai, 603203, India
| | - Chanon Pornrungroj
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Meena Rittiruam
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
- Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand
- High-Performance Computing Unit (CECC-HCU), Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand
| | - Supareak Praserthdam
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
- Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand
- High-Performance Computing Unit (CECC-HCU), Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok, 10330, Thailand
- Bio-Circular-Green-economy Technology & Engineering Center (BCGeTEC), Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Anongnat Somwangthanaroj
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
- Bio-Circular-Green-economy Technology & Engineering Center (BCGeTEC), Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Kasadit Nootong
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
- Bio-Circular-Green-economy Technology & Engineering Center (BCGeTEC), Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Rojana Pornprasertsuk
- Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
- Center of Excellence in Petrochemical and Materials Technology, Chulalongkorn University, Bangkok, 10330, Thailand
- Department of Materials Science and Bioengineering, Nagaoka University of Technology, Niigata, 940-2188, Japan
- Center of Excellence on Advanced Materials for Energy Storage, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Soorathep Kheawhom
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
- Bio-Circular-Green-economy Technology & Engineering Center (BCGeTEC), Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
- Center of Excellence on Advanced Materials for Energy Storage, Chulalongkorn University, Bangkok, 10330, Thailand
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2
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Zhou X, Zheng D, Wang Q, Xia C, Wang X, Dong W, Ganesh KS, Wang H, Wang B. In Situ Formation of Ba 3CoNb 2O 9/Ba 5Nb 4O 15 Heterostructure in Electrolytes for Enhancing Proton Conductivity and SOFC Performance. ACS APPLIED MATERIALS & INTERFACES 2023; 15:41525-41536. [PMID: 37606311 DOI: 10.1021/acsami.3c07990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
The in situ formation of a heterostructure delivers superior electrochemical properties as compared to the mechanical mixing, which shows great promise for developing new electrolytes for solid oxide fuel cells (SOFCs). Herein, in an SOFC constructed by the Ba5Nb4O15 electrolyte and Ni0.8Co0.15Al0.05LiO2-δ anode, an in situ formation of Ba3CoNb2O9/Ba5Nb4O15 heterostructure is designed by Co-ion diffusion from the anode to the electrolyte during cell operation, resulting in improved ion conductivity and fuel cell performance. An abnormal phenomenon is observed that the SOFC based on the Ba3CoNb2O9/Ba5Nb4O15 electrolyte delivered a peak power density of 703 mW/cm2 at 510 °C, which is higher than that at 550 °C. Characterization in terms of X-ray photoelectron spectroscopy and X-ray diffraction verifies that the operating temperature affected the Co doping concentrations, leading to different conducting behaviors of the heterostructure. Furthermore, it is found that the heterojunction of Ba3CoNb2O9 and Ba5Nb4O15 can restrict the electron migration to avoid current leakage of the cell and simultaneously enhance the proton conductivity. These findings manifest the developed in situ Ba3CoNb2O9/Ba5Nb4O15 heterostructure as a promising electrolyte for SOFCs.
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Affiliation(s)
- Xiaomi Zhou
- Faculty of Microelectronics, Hubei University, Wuhan, Hubei 430062, PR China
| | - Dan Zheng
- Hubei Yangtze Memory Laboratories, Wuhan 430205, China
| | - Qi Wang
- Faculty of Microelectronics, Hubei University, Wuhan, Hubei 430062, PR China
| | - Chen Xia
- Faculty of Microelectronics, Hubei University, Wuhan, Hubei 430062, PR China
| | - Xunying Wang
- Faculty of Microelectronics, Hubei University, Wuhan, Hubei 430062, PR China
| | - Wenjing Dong
- Faculty of Microelectronics, Hubei University, Wuhan, Hubei 430062, PR China
| | - K Sivajee Ganesh
- Department of Physics, Rajiv Gandhi University of Knowledge Technologies, Srikakulam, Andhra Pradesh 532402, India
| | - Hao Wang
- Faculty of Microelectronics, Hubei University, Wuhan, Hubei 430062, PR China
- Hubei Yangtze Memory Laboratories, Wuhan 430205, China
| | - Baoyuan Wang
- Faculty of Microelectronics, Hubei University, Wuhan, Hubei 430062, PR China
- Hubei Yangtze Memory Laboratories, Wuhan 430205, China
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3
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Yang X, Fernández-Carrión AJ, Kuang X. Oxide Ion-Conducting Materials Containing Tetrahedral Moieties: Structures and Conduction Mechanisms. Chem Rev 2023; 123:9356-9396. [PMID: 37486716 DOI: 10.1021/acs.chemrev.2c00913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
This Review presents an overview from the perspective of tetrahedral chemistry on various oxide ion-conducting materials containing tetrahedral moieties which have received continuous growing attention as candidates for key components of various devices, including solid oxide fuel cells and oxygen sensors, due to the deformation and rotation flexibility of tetrahedral units facilitating oxide ion transport. Emphasis is placed on the structural and mechanistic features of various systems ranging from crystalline to amorphous materials, which include a variety of gallates, silicates, germanates, molybdates, tungstates, vanadates, aluminates, niobate, titanates, indium oxides, and the newly reported borates. They contain tetrahedral units in either isolated or linked manners forming different polyhedral dimensionality (0 to 3) with various defect properties and transport mechanisms. The development of oxide ion conductors containing tetrahedral moieties and the elucidation of the roles of tetrahedral units in oxide ion migration have demonstrated diverse opportunities for discovering superior electrolytes for solid oxide fuel cells and other related devices and provided useful clues for uncovering the key factors directing fast oxide ion conduction.
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Affiliation(s)
- Xiaoyan Yang
- MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, P. R. China
| | - Alberto J Fernández-Carrión
- MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, P. R. China
| | - Xiaojun Kuang
- MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, P. R. China
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
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Yasui Y, Tansho M, Fujii K, Sakuda Y, Goto A, Ohki S, Mogami Y, Iijima T, Kobayashi S, Kawaguchi S, Osaka K, Ikeda K, Otomo T, Yashima M. Hidden chemical order in disordered Ba 7Nb 4MoO 20 revealed by resonant X-ray diffraction and solid-state NMR. Nat Commun 2023; 14:2337. [PMID: 37095089 PMCID: PMC10126145 DOI: 10.1038/s41467-023-37802-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 03/30/2023] [Indexed: 04/26/2023] Open
Abstract
The chemical order and disorder of solids have a decisive influence on the material properties. There are numerous materials exhibiting chemical order/disorder of atoms with similar X-ray atomic scattering factors and similar neutron scattering lengths. It is difficult to investigate such order/disorder hidden in the data obtained from conventional diffraction methods. Herein, we quantitatively determined the Mo/Nb order in the high ion conductor Ba7Nb4MoO20 by a technique combining resonant X-ray diffraction, solid-state nuclear magnetic resonance (NMR) and first-principle calculations. NMR provided direct evidence that Mo atoms occupy only the M2 site near the intrinsically oxygen-deficient ion-conducting layer. Resonant X-ray diffraction determined the occupancy factors of Mo atoms at the M2 and other sites to be 0.50 and 0.00, respectively. These findings provide a basis for the development of ion conductors. This combined technique would open a new avenue for in-depth investigation of the hidden chemical order/disorder in materials.
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Affiliation(s)
- Yuta Yasui
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Masataka Tansho
- NMR Station, National Institute for Materials Science (NIMS), 3-13 Sakura, Tsukuba, Ibaraki, 305-0003, Japan
| | - Kotaro Fujii
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Yuichi Sakuda
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Atsushi Goto
- NMR Station, National Institute for Materials Science (NIMS), 3-13 Sakura, Tsukuba, Ibaraki, 305-0003, Japan
| | - Shinobu Ohki
- NMR Station, National Institute for Materials Science (NIMS), 3-13 Sakura, Tsukuba, Ibaraki, 305-0003, Japan
| | - Yuuki Mogami
- NMR Station, National Institute for Materials Science (NIMS), 3-13 Sakura, Tsukuba, Ibaraki, 305-0003, Japan
| | - Takahiro Iijima
- Institute of Arts and Sciences, Yamagata University, 1-4-12 Kojirakawa-machi, Yamagata, Yamagata, 990-8560, Japan
| | - Shintaro Kobayashi
- Diffraction and Scattering Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Shogo Kawaguchi
- Diffraction and Scattering Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Keiichi Osaka
- Industrial Application and Partnership Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Kazutaka Ikeda
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 203-1 Shirakata, Tokai, Ibaraki, 319-1106, Japan
- J-PARC Center, High Energy Accelerator Research Organization (KEK), 2-4 Shirakata-Shirane, Tokai, Ibaraki, 319-1106, Japan
- School of High Energy Accelerator Science, The Graduate University for Advanced Studies, 203-1 Shirakata, Tokai, Ibaraki, 319-1106, Japan
| | - Toshiya Otomo
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 203-1 Shirakata, Tokai, Ibaraki, 319-1106, Japan
- J-PARC Center, High Energy Accelerator Research Organization (KEK), 2-4 Shirakata-Shirane, Tokai, Ibaraki, 319-1106, Japan
- School of High Energy Accelerator Science, The Graduate University for Advanced Studies, 203-1 Shirakata, Tokai, Ibaraki, 319-1106, Japan
- Graduate School of Science and Engineering, Ibaraki University, 162-1 Shirakata, Tokai, Ibaraki, 319-1106, Japan
| | - Masatomo Yashima
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan.
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5
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Ritchhart A, Filatov AS, Jeon IR, Anderson JS. Structure and Magnetic Properties of Pseudo-1D Chromium Thiolate Coordination Polymers. Inorg Chem 2023; 62:2817-2825. [PMID: 36728752 DOI: 10.1021/acs.inorgchem.2c03991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The synthesis, structure, and magnetic properties of two novel, pseudo-one-dimensional (1D) chromium thiolate coordination polymers (CPs), CrBTT and Cr2BDT3, are reported. The structures of these materials were determined using X-ray powder diffraction revealing highly symmetric 1D chains embedded within a CP framework. The magnetic coupling of this chain system was measured by SQUID magnetometry, revealing a switch from antiferromagnetic to ferromagnetic behavior dictated by the angular geometrical constraints within the CP scaffold consistent with the Goodenough-Kanamori-Anderson rules. Intrachain magnetic coupling constants JNN of -32.0 and +5.7 K were found for CrBTT and Cr2BDT3, respectively, using the 1D Bonner-Fisher model of magnetism. The band structure of these materials has also been examined by optical spectroscopy and density functional theory calculations revealing semiconducting behavior. Our findings here demonstrate how CP scaffolds can support idealized low-dimensional structural motifs and dictate magnetic interactions through tuning of geometry and inter-spin couplings.
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Affiliation(s)
- Andrew Ritchhart
- Department of Chemistry, University of Chicago, Chicago, Illinois60637, United States
| | - Alexander S Filatov
- Department of Chemistry, University of Chicago, Chicago, Illinois60637, United States
| | - Ie-Rang Jeon
- Université de Rennes, Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, 35042Rennes, France
| | - John S Anderson
- Department of Chemistry, University of Chicago, Chicago, Illinois60637, United States
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Sherwood B, Wildman EJ, Smith RI, Mclaughlin AC. Enhanced Oxide Ion Conductivity by Ta Doping of Ba 3Nb 1-xTa xMoO 8.5. Inorg Chem 2023; 62:1628-1635. [PMID: 36650095 PMCID: PMC9890478 DOI: 10.1021/acs.inorgchem.2c03943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Significant oxide ion conductivity has previously been reported for the Ba3M'M″O8.5 family (M' = Nb5+, V5+; M″ = Mo6+, W6+) of cation-deficient hexagonal perovskite derivatives. These systems exhibit considerable structural disorder and competitive occupation of two distinct oxygen positions (O3 site and O2 site), enabling two-dimensional (2D) ionic conductivity within the ab plane of the structure; higher occupation of the tetrahedral O3 site vs the octahedral O2 site is known to be a major factor that promotes oxide ion conductivity. Previous chemical doping studies have shown that substitution of small amounts of the M' or M″ ions can result in significant changes to both the structure and ionic conductivity. Here, we report on the electrical and structural properties of the Ba3Nb1-xTaxMoO8.5 series (x = 0.00, 0.025, 0.050, 0.100). AC impedance measurements show that substitution of Nb5+ with Ta5+ leads to a significant increase in low-temperature (<500 °C) conductivity for x = 0.1. Analysis of neutron and X-ray diffraction (XRD) data confirms that there is a decrease in the M1O4/M1O6 ratio upon increasing x from 0 to 0.1 in Ba3Nb1-xTaxMoO8.5, which would usually coincide with a lowering in the conductivity. However, neutron diffraction results show that Ta doping causes an increase in the oxide ion conductivity as a result of longer M1-O3 bonds and increased polyhedral distortion.
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Affiliation(s)
- Brent Sherwood
- Department
of Chemistry, University of Aberdeen, Meston Walk, AberdeenAB24 3UE, U.K.
| | - Eve J. Wildman
- Department
of Chemistry, University of Aberdeen, Meston Walk, AberdeenAB24 3UE, U.K.
| | - Ronald I. Smith
- ISIS
Facility, STFC Rutherford Appleton Laboratory, Harwell Campus, DidcotOX11 0QX, U.K.
| | - Abbie C. Mclaughlin
- Department
of Chemistry, University of Aberdeen, Meston Walk, AberdeenAB24 3UE, U.K.,
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Zhang W, Yashima M. Recent developments in oxide ion conductors: focusing on Dion-Jacobson phases. Chem Commun (Camb) 2022; 59:134-152. [PMID: 36510789 DOI: 10.1039/d2cc05288a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Oxide-ion conductors, also known as "oxygen ion conductors," have garnered significant attention in recent years due to their extensive applications in a variety of electrochemical devices, including oxygen concentrators, solid-oxide fuel cells (SOFCs), and solid oxide electrolysis cells. The key to improving the performance of these devices is the creation of novel oxide-ion conductors. In this feature article, we discuss the recent developments of new structural families of oxide-ion conductors and of the Dion-Jacobson-type layered oxide-ion conductors with a particular emphasis on CsM2Ti2NbO10-δ (M = Bi and lanthanoids; δ represents oxygen-vacancy content) and their solid solutions. CsBi2Ti2NbO10-δ is the first example of an oxide-ion conductor with a Dion-Jacobson-type layered perovskite structure, and the structural characteristics of these materials are extracted here. We have proposed an original concept that the large sized Cs+ cations and M3+ displacements yield the large bottlenecks for oxide-ion migration, which would facilitate the discovery of novel oxide-ion conductors. This article presents evidence that Dion-Jacobson-type layered perovskites are superior oxide-ion conductors. We also demonstrate how the information gleaned from these studies can be applied to the design of novel oxide-ion conductors.
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Affiliation(s)
- Wenrui Zhang
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 W4-17 O-okayama, Meguro-ku, Tokyo, 152-8551, Japan.
| | - Masatomo Yashima
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 W4-17 O-okayama, Meguro-ku, Tokyo, 152-8551, Japan.
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8
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Fop S, Dawson JA, Tawse DN, Skellern MG, Skakle JMS, Mclaughlin AC. Proton and Oxide Ion Conductivity in Palmierite Oxides. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2022; 34:8190-8197. [PMID: 36193291 PMCID: PMC9523575 DOI: 10.1021/acs.chemmater.2c01218] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 08/22/2022] [Indexed: 06/16/2023]
Abstract
Solid proton and oxide ion conductors have key applications in several hydrogen-based and energy-related technologies. Here, we report on the discovery of significant proton and oxide ion conductivity in palmierite oxides A3V2O8 (A = Sr, Ba), which crystallize with a framework of isolated tetrahedral VO4 units. We show that these systems present prevalent ionic conduction, with a large protonic component under humidified air (t H ∼ 0.6-0.8) and high protonic mobility. In particular, the proton conductivity of Sr3V2O8 is 1.0 × 10-4 S cm-1 at 600 °C, competitive with the best proton conductors constituted by isolated tetrahedral units. Simulations show that the three-dimensional ionic transport is vacancy-driven and facilitated by rotational motion of the VO4 units, which can stabilize oxygen defects via formation of V2O7 dimers. Our findings demonstrate that palmierite oxides are a new promising class of ionic conductors where stabilization of parallel vacancy and interstitial defects can enable high ionic conductivity.
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Affiliation(s)
- Sacha Fop
- ISIS
Facility, Rutherford Appleton Laboratory, Harwell OX11 0QX, United Kingdom
- The
Chemistry Department, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
| | - James A. Dawson
- Chemistry
− School of Natural and Environmental Science, Newcastle University, Newcastle NE1 7RU, United Kingdom
- Centre
for Energy, Newcastle University, Newcastle NE1 7RU, United Kingdom
| | - Dylan N. Tawse
- The
Chemistry Department, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
| | - Matthew G. Skellern
- The
Chemistry Department, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
| | - Janet M. S. Skakle
- The
Chemistry Department, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
| | - Abbie C. Mclaughlin
- The
Chemistry Department, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
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9
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Murakami T, Shibata T, Yasui Y, Fujii K, Hester JR, Yashima M. High Oxide-Ion Conductivity in a Hexagonal Perovskite-Related Oxide Ba 7 Ta 3.7 Mo 1.3 O 20.15 with Cation Site Preference and Interstitial Oxide Ions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2106785. [PMID: 34923747 DOI: 10.1002/smll.202106785] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 11/19/2021] [Indexed: 06/14/2023]
Abstract
Solid oxide-ion conductors are crucial for enabling clean and efficient energy devices such as solid oxide fuel cells. Hexagonal perovskite-related oxides have been placed at the forefront of high-performance oxide-ion conductors, with Ba7 Nb4- x Mo1+ x O20+ x /2 (x = 0-0.1) being an archetypal example. Herein, high oxide-ion conductivity and stability under reducing conditions in Ba7 Ta3.7 Mo1.3 O20.15 are reported by investigating the solid solutions Ba7 Ta4- x Mo1+ x O20+ x /2 (x = 0.2-0.7). Neutron diffraction indicates a large number of interstitial oxide ions in Ba7 Ta3.7 Mo1.3 O20.15 , leading to a high level of oxide-ion conductivity (e.g., 1.08 × 10-3 S cm-1 at 377 °C). The conductivity of Ba7 Ta3.7 Mo1.3 O20.15 is higher than that of Ba7 Nb4 MoO20 and conventional yttria-stabilized zirconia. In contrast to Ba7 Nb4- x Mo1+ x O20+ x /2 (x = 0-0.1), the oxide-ion conduction in Ba7 Ta3.7 Mo1.3 O20.15 is dominant even in highly reducing atmospheres (e.g., oxygen partial pressure of 1.6 × 10-24 atm at 909 °C). From structural analyses of the synchrotron X-ray diffraction data for Ba7 Ta3.7 Mo1.3 O20.15 , contrasting X-ray scattering powers of Ta5+ and Mo6+ allow identification of the preferential occupation of Mo6+ adjacent to the intrinsically oxygen-deficient layers, as supported by DFT calculations. The high conductivity and chemical and electrical stability in Ba7 Ta3.7 Mo1.3 O20.15 provide a strategy for the development of solid electrolytes based on hexagonal perovskite-related oxides.
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Affiliation(s)
- Taito Murakami
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Toshiya Shibata
- Kojundo Chemical Laboratory Co. Ltd., 5-1-28, Chiyoda, Sakado, Saitama, 350-0284, Japan
| | - Yuta Yasui
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Kotaro Fujii
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - James R Hester
- Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation (ANSTO), Locked Bag 2001, Kirrawee DC, New South Wales, 2232, Australia
| | - Masatomo Yashima
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
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10
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Gilane A, Fop S, Tawse DN, Ritter C, Mclaughlin AC. Variable Temperature Neutron Diffraction Study of the Oxide Ion Conductor Ba 3VWO 8.5. Inorg Chem 2022; 61:1597-1602. [PMID: 35015549 DOI: 10.1021/acs.inorgchem.1c03354] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ba3VWO8.5 is an oxide ion conductor with a bulk conductivity of 5.0 × 10-5 S cm-1 at 600 °C. Ba3VWO8.5 is anomalous to the other Ba3M'M″O8.5 (M' = Nb; M″ = Mo, W) oxide ionic conductors, as it exhibits cation order with vanadium and tungsten on the M1 site only. Here, we report a variable temperature neutron diffraction study of Ba3VWO8.5, which demonstrates that cation order is retained up to 800 °C. We show for the first time that the structural rearrangements reported for hexagonal perovskite derivatives Ba3M'M″O8.5 are dictated by water absorption. The significant water uptake in Ba3M'M″O8.5 (M' = Nb; M″ = Mo, W) arises due to the flexibility of the crystal structure, whereby a fraction of the transition metal cations move from the M1 site to the octahedral M2 site upon absorption of water. The results presented here demonstrate that the presence of 50% V5+ on the M1 site, which has a strong preference for tetrahedral geometry, is enough to disrupt the flexibility of the cation sublattice, resulting in the ordering of the cations exclusively on the M1 site and no significant water absorption.
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Affiliation(s)
- Asma Gilane
- The Chemistry Department, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, United Kingdom.,Department of Chemistry and Chemical Engineering, SBA School of Science and Engineering, Lahore University of Management Sciences (LUMS), Lahore 54792, Pakistan
| | - Sacha Fop
- The Chemistry Department, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, United Kingdom.,ISIS Facility, Rutherford Appleton Laboratory, Harwell Campus, Didcot OX11 0QX, United Kingdom
| | - Dylan N Tawse
- The Chemistry Department, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, United Kingdom
| | - Clemens Ritter
- Institut Laue Langevin, 71 Avenue des Martyrs, BP 156, F-38042 Grenoble Cedex 9, France
| | - Abbie C Mclaughlin
- The Chemistry Department, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, United Kingdom
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11
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Cheng Z, Yang J, Jiang P, Huang H, da-Silva I, Gao W, Cong R, Yang T. Enhancing the oxide-ionic conductivity of Ba 3Mo 1+xNb 1-2xGe xO 8.5 at intermediate temperatures: the effect of site-selective Ge 4+-substitution. Dalton Trans 2021; 50:17249-17256. [PMID: 34786583 DOI: 10.1039/d1dt02469h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Significant oxide-ionic conductivity has been recently reported for a family of cation-deficient hexagonal perovskite derivatives Ba3M2O8.5 (M = Mo/W6+ and Nb5+/V5+). Herein, strong 4-fold coordination geometry preferring Ge4+ ions are doped into Ba3Mo1+xNb1-2xGexO8.5 to manipulate the oxygen distribution within palmierite-like layers for the enhancement of oxide-ionic conductivity. Rietveld refinement of the neutron diffraction data of Ba3Mo1.2Nb0.6Ge0.2O8.5 reveals that Ge4+-ions are selectively incorporated into the palmierite-like layers, owing to their strong 4-fold coordination environment preference. Such a site-selective doping behavior leads to an increase in the occupation proportion of the O3 site and a concomitant decrease in the occupancy factor for O2. Ionic conduction measurements show that the bulk conductivity of Ba3Mo1.2Nb0.6Ge0.2O8.5 is about twice higher than that of the parent compound at intermediate temperatures (300-500 °C). Furthermore, bond-valence site energy (BVSE) landscape analysis reveals that the oxygen ionic conduction of Ba3Mo1+xNb1-2xGexO8.5 is dominated by the two-dimensional pathways along the palmierite-like layers, despite the three-dimensional (3D) oxygen diffusion pathways being present in the hybrid structure, which strongly confirms that the enhancement in ionic conductivity at intermediate temperatures is attributed to the site-selective Ge4+-substitution-induced redistribution of oxygen ions within the palmierite-like layers.
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Affiliation(s)
- Zien Cheng
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China.
| | - Jia Yang
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, P. R. China
| | - Pengfei Jiang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China.
| | - He Huang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China.
| | - Ivan da-Silva
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX110QX, UK
| | - Wenliang Gao
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China.
| | - Rihong Cong
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China.
| | - Tao Yang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, P. R. China.
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12
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Tawse DN, Gilane A, Fop S, Martinez-Felipe A, Sher F, Smith RI, Mclaughlin AC. Investigation of the Crystal Structure and Ionic Pathways of the Hexagonal Perovskite Derivative Ba 3-xVMoO 8.5-x. Inorg Chem 2021; 60:13550-13556. [PMID: 34405996 DOI: 10.1021/acs.inorgchem.1c01840] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The hexagonal perovskite derivatives Ba3NbMoO8.5, Ba3NbWO8.5, and Ba3VWO8.5 have recently been reported to exhibit significant oxide ion conductivity. Here, we report the synthesis and crystal structure of the hexagonal perovskite derivative Ba3-xVMoO8.5-x. Rietveld refinement from neutron and X-ray diffraction data show that the cation vacancies are ordered on the M2 site, leading to a structure consisting of palmierite-like layers of M1Ox polyhedra separated by vacant octahedral layers. In contrast to other members of the Ba3M'M″O8.5 family, Ba3-xVMoO8.5-x is not stoichiometric and both barium and oxygen vacancies are present. Although synthesized in air at elevated temperatures, Ba3-xVMoO8.5-x is unstable at lower temperatures, as illustrated by the formation of BaCO3 and BaMoO4 by heat treatment in air at 400 °C. This precludes measurement of the electrical properties. However, bond-valence site energy (BVSE) calculations strongly suggest that oxide ion conductivity is present in Ba3-xVMoO8.5-x.
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Affiliation(s)
- Dylan N Tawse
- Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, United Kingdom
| | - Asma Gilane
- Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, United Kingdom.,Department of Chemistry and Chemical Engineering, SBA School of Science and Engineering, Lahore University of Management Sciences (LUMS), Lahore 54792, Pakistan
| | - Sacha Fop
- Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, United Kingdom.,ISIS Facility, Rutherford Appleton Laboratory, Harwell Campus, Didcot OX11 0QX, United Kingdom
| | - Alfonso Martinez-Felipe
- Chemical and Materials Engineering Group, School of Engineering, University of Aberdeen, King's College, Old Aberdeen AB24 3UE, United Kingdom
| | - Falak Sher
- Department of Chemistry and Chemical Engineering, SBA School of Science and Engineering, Lahore University of Management Sciences (LUMS), Lahore 54792, Pakistan
| | - Ronald I Smith
- ISIS Facility, Rutherford Appleton Laboratory, Harwell Campus, Didcot OX11 0QX, United Kingdom
| | - Abbie C Mclaughlin
- Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen AB24 3UE, United Kingdom
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13
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Jin C, Mutailipu M, Jin W, Han S, Yang Z, Pan S. Cation Substitution of Hexagonal Triple Perovskites: A Case in Trimetallic Tellurates A 2A'BTe 2O 9. Inorg Chem 2021; 60:6099-6106. [PMID: 33823113 DOI: 10.1021/acs.inorgchem.1c00623] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three new tellurates, namely, K2BaPb0.62Ba0.38Te2O9 (1), Rb2BaPb0.7Ba0.3Te2O9 (2), and Ba2KLiTe2O9 (3), with hexagonal triple-perovskite structures have been designed via a cation substitution strategy. All three centrosymmetric compounds crystallize in the same hexagonal space group P63/mmc. In their structures, the [BTe2O9] (B = Pb/Ba for 1 and 2 and Li for 3) groups construct the final three-dimensional framework using face-sharing [Te2O9] dimmers and vertex-linked [BO6] linkages. Meanwhile, the theoretical calculations demonstrate the numerical differences of their birefringence. Thermal stability analysis and differential scanning calorimetry were performed, and UV-vis-NIR diffuse reflectance spectra and infrared spectra of the three title compounds were also characterized and analyzed.
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Affiliation(s)
- Congcong Jin
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Miriding Mutailipu
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenqi Jin
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shujuan Han
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhihua Yang
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shilie Pan
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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14
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High oxide-ion conductivity through the interstitial oxygen site in Ba 7Nb 4MoO 20-based hexagonal perovskite related oxides. Nat Commun 2021; 12:556. [PMID: 33495469 PMCID: PMC7835212 DOI: 10.1038/s41467-020-20859-w] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 12/21/2020] [Indexed: 11/08/2022] Open
Abstract
Oxide-ion conductors are important in various applications such as solid-oxide fuel cells. Although zirconia-based materials are widely utilized, there remains a strong motivation to discover electrolyte materials with higher conductivity that lowers the working temperature of fuel cells, reducing cost. Oxide-ion conductors with hexagonal perovskite related structures are rare. Herein, we report oxide-ion conductors based on a hexagonal perovskite-related oxide Ba7Nb4MoO20. Ba7Nb3.9Mo1.1O20.05 shows a wide stability range and predominantly oxide-ion conduction in an oxygen partial pressure range from 2 × 10-26 to 1 atm at 600 °C. Surprisingly, bulk conductivity of Ba7Nb3.9Mo1.1O20.05, 5.8 × 10-4 S cm-1, is remarkably high at 310 °C, and higher than Bi2O3- and zirconia-based materials. The high conductivity of Ba7Nb3.9Mo1.1O20.05 is attributable to the interstitial-O5 oxygen site, providing two-dimensional oxide-ion O1-O5 interstitialcy diffusion through lattice-O1 and interstitial-O5 sites in the oxygen-deficient layer, and low activation energy for oxide-ion conductivity. Present findings demonstrate the ability of hexagonal perovskite related oxides as superior oxide-ion conductors.
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15
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Singh P, Pandey R, Miruszewski T, Dzierzgowski K, Mielewczyk-Gryn A, Singh P. Signature of Oxide-Ion Conduction in Alkaline-Earth-Metal-Doped Y 3GaO 6. ACS OMEGA 2020; 5:30395-30404. [PMID: 33283087 PMCID: PMC7711709 DOI: 10.1021/acsomega.0c03433] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 10/06/2020] [Indexed: 06/12/2023]
Abstract
We have studied alkaline-earth-metal-doped Y3GaO6 as a new family of oxide-ion conductor. Solid solutions of Y3GaO6 and 2% -Ca2+-, -Sr2+-, and -Ba2+-doped Y3GaO6, i.e., Y(3-0.06)M0.06GaO6-δ (M = Ca2+, Sr2+, and Ba2+), were prepared via a conventional solid-state reaction route. X-ray Rietveld refined diffractograms of all the compositions showed the formation of an orthorhombic structure having the Cmc21 space group. Scanning electron microscopy (SEM) images revealed that the substitution of alkaline-earth metal ions promotes grain growth. Aliovalent doping of Ca2+, Sr2+, and Ba2+ enhanced the conductivity by increasing the oxygen vacancy concentration. However, among all of the studied dopants, 2% Ca2+-doped Y3GaO6 was found to be more effective in increasing the ionic conductivity as ionic radii mismatch is minimum for Y3+/Ca2+. The total conductivity of 2% Ca-doped Y3GaO6 composition calculated using the complex impedance plot was found to be ∼0.14 × 10-3 S cm-1 at 700 °C, which is comparable to many other reported solid electrolytes at the same temperature, making it a potential candidate for future electrolyte material for solid oxide fuel cells (SOFCs). Total electrical conductivity measurement as a function of oxygen partial pressure suggests dominating oxide-ion conduction in a wide range of oxygen partial pressure (ca. 10-20-10-4 atm). The oxygen-ion transport is attributed to the presence of oxygen vacancies that arise from doping and conducting oxide-ion layers of one, two-, or three-dimensional channels within the crystal structure. The oxide-ion migration pathways were analyzed by the bond valence site energy (BVSE)-based approach. Photoluminescence analysis, dilatometry, Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy studies were also performed to verify the experimental findings.
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Affiliation(s)
- Pragati Singh
- Department
of Physics, Indian Institute of Technology
(Banaras Hindu University), Varanasi 221005, India
| | - Raghvendra Pandey
- Department
of Physics, A.R.S.D. College, University
of Delhi, New Delhi 110021, India
| | - Tadeusz Miruszewski
- Faculty
of Applied Physics and Mathematics, and Advanced Materials Centre, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
| | - Kacper Dzierzgowski
- Faculty
of Applied Physics and Mathematics, and Advanced Materials Centre, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
| | - Aleksandra Mielewczyk-Gryn
- Faculty
of Applied Physics and Mathematics, and Advanced Materials Centre, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
| | - Prabhakar Singh
- Department
of Physics, Indian Institute of Technology
(Banaras Hindu University), Varanasi 221005, India
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16
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Auckett JE, Gutmann MJ, Evans IR. Understanding the Correlation between Oxide Ion Mobility and Site Distributions in Ba 3NbWO 8.5. Inorg Chem 2020; 59:14245-14250. [PMID: 32969646 DOI: 10.1021/acs.inorgchem.0c02035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A correlation between oxygen site distributions and ionic conductivity has been established in the recently discovered family of oxide-ion conductors Ba3M2O8.5±δ (M = Nb, V, Mo, W). We rationalize this observation on the basis of structural insights gained from the first single-crystal neutron diffraction data collected for a member of this family, Ba3NbWO8.5, and theoretical considerations of bonding and O site energies.
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Affiliation(s)
- Josie E Auckett
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom
| | - Matthias J Gutmann
- Rutherford Appleton Laboratory, ISIS Facility, Chilton Didcot, Oxfordshire OX11 0QX, United Kingdom
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17
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Fop S, McCombie KS, Wildman EJ, Skakle JMS, Irvine JTS, Connor PA, Savaniu C, Ritter C, Mclaughlin AC. High oxide ion and proton conductivity in a disordered hexagonal perovskite. NATURE MATERIALS 2020; 19:752-757. [PMID: 32123332 DOI: 10.1038/s41563-020-0629-4] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 01/31/2020] [Indexed: 05/10/2023]
Abstract
Oxide ion and proton conductors, which exhibit high conductivity at intermediate temperature, are necessary to improve the performance of ceramic fuel cells. The crystal structure plays a pivotal role in defining the ionic conduction properties, and the discovery of new materials is a challenging research focus. Here, we show that the undoped hexagonal perovskite Ba7Nb4MoO20 supports pure ionic conduction with high proton and oxide ion conductivity at 510 °C (the bulk conductivity is 4.0 mS cm-1), and hence is an exceptional candidate for application as a dual-ion solid electrolyte in a ceramic fuel cell that will combine the advantages of both oxide ion and proton-conducting electrolytes. Ba7Nb4MoO20 also showcases excellent chemical and electrical stability. Hexagonal perovskites form an important new family of materials for obtaining novel ionic conductors with potential applications in a range of energy-related technologies.
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Affiliation(s)
- Sacha Fop
- Department of Chemistry, University of Aberdeen, Aberdeen, UK.
| | | | - Eve J Wildman
- Department of Chemistry, University of Aberdeen, Aberdeen, UK
| | - Jan M S Skakle
- Department of Chemistry, University of Aberdeen, Aberdeen, UK
| | - John T S Irvine
- School of Chemistry, University of St Andrews, St Andrews, UK
| | - Paul A Connor
- School of Chemistry, University of St Andrews, St Andrews, UK
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18
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Oxide-ion conduction in the Dion-Jacobson phase CsBi 2Ti 2NbO 10-δ. Nat Commun 2020; 11:1224. [PMID: 32144260 PMCID: PMC7060205 DOI: 10.1038/s41467-020-15043-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 02/17/2020] [Indexed: 11/29/2022] Open
Abstract
Oxide-ion conductors have found applications in various electrochemical devices, such as solid-oxide fuel cells, gas sensors, and separation membranes. Dion–Jacobson phases are known for their rich magnetic and electrical properties; however, there have been no reports on oxide-ion conduction in this family of materials. Here, for the first time to the best of our knowledge, we show the observation of fast oxygen anionic conducting behavior in CsBi2Ti2NbO10−δ. The bulk ionic conductivity of this Dion–Jacobson phase is 8.9 × 10−2 S cm−1 at 1073 K, a level that is higher than that of the conventional yttria-stabilized zirconia. The oxygen ion transport is attributable to the large anisotropic thermal motions of oxygen atoms, the presence of oxygen vacancies, and the formation of oxide-ion conducting layers in the crystal structure. The present finding of high oxide-ion conductivity in rare-earth-free CsBi2Ti2NbO10−δ suggests the potential of Dion–Jacobson phases as a platform to identify superior oxide-ion conductors. Oxide ion conductors are an exciting class of materials with applications in various domains. Here, the authors show that Dion–Jacobson Phases are a structure supporting high O2− mobility. The bulk conductivity of CsBi2Ti2NbO10−δ even exceeds that of YSZ, offering new possibilities in electrolyte discovery.
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19
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Mercier N. Hybrid Halide Perovskites: Discussions on Terminology and Materials. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909601] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Nicolas Mercier
- MOLTECH-Anjou—UMR CNRS 6200University of Angers 2 Bd Lavoisier 49045 Angers France
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20
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Mercier N. Hybrid Halide Perovskites: Discussions on Terminology and Materials. Angew Chem Int Ed Engl 2019; 58:17912-17917. [PMID: 31539188 DOI: 10.1002/anie.201909601] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Indexed: 01/09/2023]
Abstract
Hybrid halide perovskites (HP) have emerged in the last decade as a new class of semiconductors with superior performances in photovoltaic and electronic devices. The literature about these halide semiconductors is abundant and a lot of names/expressions are used to define networks, structures, or materials. In this context, there is a need to offer some discussions about the relevance of using the word "perovskite" and the associated expressions ("RP" (Ruddlesden-Popper), "DJ" (Dion-Jacobson), "ACI" (alternating cations in the interlayer space), "hexagonal perovskites", "hollow perovskites", "d-HP" (deficient 3D HP),…). Moreover, the description of perovskite networks through elimination/substitution processes from the ABX3 structure will be compared to the known dimensional reduction concept.
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Affiliation(s)
- Nicolas Mercier
- MOLTECH-Anjou-UMR CNRS 6200, University of Angers, 2 Bd Lavoisier, 49045, Angers, France
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21
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Yasui Y, Niwa E, Matsui M, Fujii K, Yashima M. Discovery of a Rare-Earth-Free Oxide-Ion Conductor Ca3Ga4O9 by Screening through Bond Valence-Based Energy Calculations, Synthesis, and Characterization of Structural and Transport Properties. Inorg Chem 2019; 58:9460-9468. [DOI: 10.1021/acs.inorgchem.9b01300] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuta Yasui
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Eiki Niwa
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Masahiro Matsui
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Kotaro Fujii
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Masatomo Yashima
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-W4-17, O-okayama, Meguro-ku, Tokyo 152-8551, Japan
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