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Maltsev AP, Chepkasov IV, Oganov AR. Order-Disorder Phase Transition and Ionic Conductivity in a Li 2B 12H 12 Solid Electrolyte. ACS APPLIED MATERIALS & INTERFACES 2023; 15:42511-42519. [PMID: 37656904 DOI: 10.1021/acsami.3c07242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/03/2023]
Abstract
Temperature-induced phase transitions and ionic conductivities of Li2B12H12 and LiCB11H12 were simulated with the use of machine learning interatomic potentials based on van der Waals-corrected density functional theory (rev-vdW-DF2 functional). The simulated temperature of order-disorder phase transition, lattice parameters, diffusion, ionic conductivity, and activation energies are in good agreement with experimental data. Our simulations of Li2B12H12 uncover the importance of the reorientational motion of the [B12H12]2- anion. In the ordered α-phase (T < 625 K), these anions have well-defined orientations, while in the disordered β-phase (T > 625 K), their orientations are random. In vacancy-rich systems, its complete rotation was observed, while in the ideal crystal, the anions display limited vabrational motion, indicating the static nature of the phase transition without dynamic disordering. The use of machine learning interatomic potentials has allowed us to study large systems (>2000 atoms) in long (nanosecond-scale) molecular dynamics runs with ab initio quality.
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Affiliation(s)
- Alexey P Maltsev
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, Moscow 121205, Russia
| | - Ilya V Chepkasov
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, Moscow 121205, Russia
| | - Artem R Oganov
- Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, Moscow 121205, Russia
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2
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P Madureira LM, Dias LG, Parreira RLT, Caramori GF. Shedding light on the physical nature of ion pair interactions involving carba- closo-dodecaborate anions. Insights from computation. Phys Chem Chem Phys 2023; 25:5710-5717. [PMID: 36734957 DOI: 10.1039/d2cp04489g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
closo-Carboranes are structures that have been studied for many decades due to their vast applicability in medicine, catalysis, and energy storage. In order to go deeper into the physics behind the interactions of oppositely charged ions, which have potential applications in electrical energy storage and conversion devices, the present work aims to shed light on the physical nature of the interactions involving (R-CB11H11-, R = H, F, CH3, CF3) and Mq+ = Li+, Na+, Mg2+, Zn2+ ions. The bonding situations are evaluated in light of both canonical Kohn-Sham energy decomposition, EDA-NOCV, and local energy decomposition, LED, analyses. Electron and hole transports are also evaluated through charge transfer integrals. The findings reveal that such complexes present not only more significant electrostatic, but also non-negligible orbital contributions. Both energy decomposition analyses EDA-NOCV and DLPNO-LED confirm that the strength of ionic pair interactions (R-CB11H11- ↔ Mq+) is much more dependent on the nature of the cation employed than on the substituent R used. The results also reveal that charge transfers are not significant in such interacting systems.
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Affiliation(s)
- Letícia M P Madureira
- Chemistry Department, Federal University of Santa Catarina, Florianópolis, SC, 88040-970, Brazil.
| | - Luis G Dias
- Departamento de Química, FFCLRP, Universidade de São Paulo, Avenida Bandeirantes 3900, 14040-901 Ribeirão Preto, SP, Brazil
| | - Renato L T Parreira
- Núcleo de Pesquisa em Ciências Exatas e Tecnológicas, Universidade de Franca, Franca, SP, Brazil
| | - Giovanni F Caramori
- Chemistry Department, Federal University of Santa Catarina, Florianópolis, SC, 88040-970, Brazil.
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Brighi M, Murgia F, Łodziana Z, Černý R. Structural Phase Transitions in closo-Dicarbadodecaboranes C 2B 10H 12. Inorg Chem 2022; 61:5813-5823. [PMID: 35363480 PMCID: PMC9019807 DOI: 10.1021/acs.inorgchem.1c04022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The crystal structures of three thermal polymorphs (I, II, and III) for each isomer of closo-dicarbadodecaboranes C2B10H12 (ortho, meta, and para) have been determined by combining synchrotron radiation X-ray powder diffraction and density functional theory calculations. The structures are in agreement with previous calorimetric and spectroscopic studies. The difference between rotatory phases (plastic crystals) I and II lies in isotropic rotations in the former and anisotropic rotations of the icosahedral clusters in the latter. Phase I is the cubic close packing (ccp) of rotating closo-molecules C2B10H12 in the space group Fm3̅. Phase II is the ccp of rotating closo-molecules C2B10H12 in the cubic space group Pa3̅. The preferred rotational axis in II varies with the isomer. The ordered phases III are orthorhombic (meta) or monoclinic (ortho and para) deformations of the cubic unit cell of the disordered phases I and II. The ordering in the phase III of the ortho-isomer carrying the biggest electrical dipole moment creates a twofold superstructure w.r.t. the cubic unit cell. The thermal polymorphism for C2B10H12 and related metal salts can be explained by division of the cohesive intercluster interactions into two categories (i) dispersive cohesive interaction with additional Coulombic components in the metal salts and (ii) anisotropic local interaction resulting from nonuniform charge distribution around icosahedral clusters. The local interactions are averaged out by thermally activated cluster dynamics (rotations and rotational jumps) which effectively increase the symmetry of the cluster. The C2B10H12 molecules resist at least as well as the CB11H12- anion to the oxidation, and both clusters form easily a mixed compound. This allows designing solid electrolytes such as Nax(CB11H12)x(C2B10H12)1-x, where the cation content may be varied and the temperature of transition into the disordered conducting phase is decreased.
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Affiliation(s)
- Matteo Brighi
- Department of Quantum Matter Physics, Laboratory of Crystallography, University of Geneva, Quai Ernest-Ansermet 24, CH-1211 Geneva, Switzerland
| | - Fabrizio Murgia
- Department of Quantum Matter Physics, Laboratory of Crystallography, University of Geneva, Quai Ernest-Ansermet 24, CH-1211 Geneva, Switzerland
| | - Zbigniew Łodziana
- Polish Academy of Sciences, Institute of Nuclear Physics, ul. Radzikowskiego 152, 31-342 Krakow, Poland
| | - Radovan Černý
- Department of Quantum Matter Physics, Laboratory of Crystallography, University of Geneva, Quai Ernest-Ansermet 24, CH-1211 Geneva, Switzerland
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Moury R, Łodziana Z, Remhof A, Duchêne L, Roedern E, Gigante A, Hagemann H. Study of the Temperature- and Pressure-Dependent Structural Properties of Alkali Hydrido- closo-borate Compounds. Inorg Chem 2022; 61:5224-5233. [PMID: 35324183 PMCID: PMC8985130 DOI: 10.1021/acs.inorgchem.1c03681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
In this work, we
report on the structural properties of alkali
hydrido-closo-(car)borates, a promising class of
solid-state electrolyte materials, using high-pressure and temperature-dependent
X-ray diffraction experiments combined with density functional theory
(DFT) calculations. The mechanical properties are determined via pressure-dependent
diffraction studies and DFT calculations; the shear moduli appear
to be very low for all studied compounds, revealing their high malleability
(that can be beneficial for the manufacturing and stable cycling of
all-solid-state batteries). The thermodiffraction experiments also
reveal a high coefficient of thermal expansion for these materials.
We discover a pressure-induced phase transition for K2B12H12 from Fm3̅ to Pnnm symmetry around 2 GPa. A temperature-induced phase
transition for Li2B10H10 was also
observed for the first time by thermodiffraction, and the crystal
structure determined by combining experimental data and DFT calculations.
Interestingly, all phases of the studied compounds (including newly
discovered high-pressure and high-temperature phases) may be related
via a group–subgroup relationship, with the notable exception
of the room-temperature phase of Li2B10H10. Herein, we study the pressure and temperature
dependencies
of alkali hydrido-closo-borates in extracting the
mechanical properties of this class of compounds that have a promising
future as solid electrolytes. In our research, we have discovered
and determined two new high-pressure and high-temperature crystal
structures.
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Affiliation(s)
- Romain Moury
- Department of Physical Chemistry, University of Geneva, 30 Quai E. Ansermet, Geneva 1211, Switzerland.,Institut des Molécules et Matériaux du Mans, University of le Mans, Avenue Olivier Messiaen, Le Mans 72085, France
| | - Zbigniew Łodziana
- Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, Kraków 31342, Poland
| | - Arndt Remhof
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
| | - Léo Duchêne
- Department of Physical Chemistry, University of Geneva, 30 Quai E. Ansermet, Geneva 1211, Switzerland.,Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
| | - Elsa Roedern
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
| | - Angelina Gigante
- Department of Physical Chemistry, University of Geneva, 30 Quai E. Ansermet, Geneva 1211, Switzerland.,Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
| | - Hans Hagemann
- Department of Physical Chemistry, University of Geneva, 30 Quai E. Ansermet, Geneva 1211, Switzerland
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Dobbins TA. Overview of the Structure-Dynamics-Function Relationships in Borohydrides for Use as Solid-State Electrolytes in Battery Applications. Molecules 2021; 26:3239. [PMID: 34071198 PMCID: PMC8198551 DOI: 10.3390/molecules26113239] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 02/22/2021] [Accepted: 04/17/2021] [Indexed: 11/17/2022] Open
Abstract
The goal of this article is to highlight crucial breakthroughs in solid-state ionic conduction in borohydrides for battery applications. Borohydrides, Mz+BxHy, form in various molecular structures, for example, nido-M+BH4; closo-M2+B10H10; closo-M2+B12H12; and planar-M6+B6H6 with M = cations such as Li+, K+, Na+, Ca2+, and Mg2+, which can participate in ionic conduction. This overview article will fully explore the phase space of boron-hydrogen chemistry in order to discuss parameters that optimize these materials as solid electrolytes for battery applications. Key properties for effective solid-state electrolytes, including ionic conduction, electrochemical window, high energy density, and resistance to dendrite formation, are also discussed. Because of their open structures (for closo-boranes) leading to rapid ionic conduction, and their ability to undergo phase transition between low conductivity and high conductivity phases, borohydrides deserve a focused discussion and further experimental efforts. One challenge that remains is the low electrochemical stability of borohydrides. This overview article highlights current knowledge and additionally recommends a path towards further computational and experimental research efforts.
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Affiliation(s)
- Tabbetha A Dobbins
- Department of Physics and Astronomy, Rowan University, Glassboro, NJ 08028, USA
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Ethanol- and Methanol-Coordinated and Solvent-Free Dodecahydro closo-Dodecaborates of 3d Transition Metals and of Magnesium. CRYSTALS 2019. [DOI: 10.3390/cryst9070372] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Magnesium and 3d transition metals closo-borates were prepared by mechanosynthesis (ball milling) of the mixtures Na2B12H12 + MCl2 (M = Mn, Fe, Co, Ni, Mg), followed by addition of ethanol or methanol and drying under dynamic vacuum. The dead mass of NaCl is partly removed by filtration. The crystal structures of solvent-coordinated and solvent-free closo-borates have been characterized by temperature dependent synchrotron radiation X-ray powder diffraction, ab initio calculations, thermal analysis and infrared spectroscopy. Various solvated complexes containing six, four, three, two or one solvent molecules were obtained by successive removal of the solvent until in most case the solvent-free metal closo-borates were obtained with the exception of Mg whose hypothetical crystal structure, however, could have its prototype in MnB12H12. The 3d transition metal closo-borates were studied in the view of their potential use as Na- or Li-ion battery electrodes in combination with Na or Li closo-borate solid electrolytes. The metal oxidation state (II) obtained in compounds presented here does not allow such application.
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Kang S, Heo TW, Allendorf MD, Wood BC. Morphology-Dependent Stability of Complex Metal Hydrides and Their Intermediates Using First-Principles Calculations. Chemphyschem 2019; 20:1340-1347. [PMID: 30887700 DOI: 10.1002/cphc.201801132] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 03/05/2019] [Indexed: 11/06/2022]
Abstract
Complex light metal hydrides are promising candidates for efficient, compact solid-state hydrogen storage. (De)hydrogenation of these materials often proceeds via multiple reaction intermediates, the energetics of which determine reversibility and kinetics. At the solid-state reaction front, molecular-level chemistry eventually drives the formation of bulk product phases. Therefore, a better understanding of realistic (de)hydrogenation behavior requires considering possible reaction products along all stages of morphological evolution, from molecular to bulk crystalline. Here, we use first-principles calculations to explore the interplay between intermediate morphology and reaction pathways. Employing representative complex metal hydride systems, we investigate the relative energetics of three distinct morphological stages that can be expressed by intermediates during solid-state reactions: i) dispersed molecules; ii) clustered molecular chains; and iii) condensed-phase crystals. Our results verify that the effective reaction energy landscape strongly depends on the morphological features and associated chemical environment, offering a possible explanation for observed discrepancies between X-ray diffraction and nuclear magnetic resonance measurements. Our theoretical understanding also provides physical and chemical insight into phase nucleation kinetics upon (de)hydrogenation of complex metal hydrides.
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Affiliation(s)
- ShinYoung Kang
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USA
| | - Tae Wook Heo
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USA
| | - Mark D Allendorf
- Sandia National Laboratories, 7011 East Ave, Livermore, CA 94550, USA
| | - Brandon C Wood
- Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USA
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