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Keshri SR, Ganisetti S, Kumar R, Gaddam A, Illath K, Ajithkumar TG, Balaji S, Annapurna K, Nasani N, Krishnan NMA, Allu AR. Ionic Conductivity of Na 3Al 2P 3O 12 Glass Electrolytes-Role of Charge Compensators. Inorg Chem 2021; 60:12893-12905. [PMID: 34369768 DOI: 10.1021/acs.inorgchem.1c01280] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In glasses, a sodium ion (Na+) is a significant mobile cation that takes up a dual role, that is, as a charge compensator and also as a network modifier. As a network modifier, Na+ cations modify the structural distributions and create nonbridging oxygens. As a charge compensator, Na+ cations provide imbalanced charge for oxygen that is linked between two network-forming tetrahedra. However, the factors controlling the mobility of Na+ ions in glasses, which in turn affects the ionic conductivity, remain unclear. In the current work, using high-fidelity experiments and atomistic simulations, we demonstrate that the ionic conductivity of the Na3Al2P3O12 (Si0) glass material is dependent not only on the concentration of Na+ charge carriers but also on the number of charge-compensated oxygens within its first coordination sphere. To investigate, we chose a series of glasses formulated by the substitution of Si for P in Si0 glass based on the hypothesis that Si substitution in the presence of Na+ cations increases the number of Si-O-Al bonds, which enhances the role of Na as a charge compensator. The structural and conductivity properties of bulk glass materials are evaluated by molecular dynamics (MD) simulations, magic angle spinning-nuclear magnetic resonance, Raman spectroscopy, and impedance spectroscopy. We observe that the increasing number of charge-imbalanced bridging oxygens (BOs) with the substitution of Si for P in Si0 glass enhances the ionic conductivity by an order of magnitude-from 3.7 × 10-8 S.cm-1 to 3.3 × 10-7 S.cm-1 at 100 °C. By rigorously quantifying the channel regions in the glass structure, using MD simulations, we demonstrate that the enhanced ionic conductivity can be attributed to the increased connectivity of Na-rich channels because of the increased charge-compensated BOs around the Na atoms. Overall, this study provides new insights for designing next-generation glass-based electrolytes with superior ionic conductivity for Na-ion batteries.
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Affiliation(s)
- Shweta R Keshri
- Energy Materials and Devices Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India
| | - Sudheer Ganisetti
- Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Rajesh Kumar
- Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Anuraag Gaddam
- CICECO - Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, Santiago University Campus, 3810-193 Aveiro, Portugal
| | - Kavya Illath
- Central NMR Facility and Physical /Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Thalasseril G Ajithkumar
- Central NMR Facility and Physical /Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sathravada Balaji
- Glass Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India
| | - K Annapurna
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.,Glass Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India
| | - Narendar Nasani
- Centre for Materials for Electronics Technology (C-MET), (Under Ministry of Electronics & Information Technology (MeitY), Govt. of India), IDA Phase - III, Cherlapally, HCL Post Hyderabad 500 051 Telangana, India
| | - N M Anoop Krishnan
- Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.,Department of Materials Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Amarnath R Allu
- Energy Materials and Devices Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Thieu Duc T, Rayavarapu PR, Adams S. Mobile ion transport pathways in (LiBr) x [(Li2O)0.6(P2O5)0.4](1−x) glasses. J Solid State Electrochem 2010. [DOI: 10.1007/s10008-010-1005-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Vegiri A, Varsamis CPE. Clustering and percolation in lithium borate glasses. J Chem Phys 2004; 120:7689-95. [PMID: 15267680 DOI: 10.1063/1.1689644] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Molecular dynamics simulations are carried out in xLi2O-(1-x)B2O3 glasses (x=0.2-0.6) at T=1250 K, where cluster size distributions for Li cations and nonbridging oxygen (NBO) atoms are calculated. The existence of percolating clusters above x=0.3 places the percolation threshold between x=0.3 and 0.4 for the system under investigation, which is consistent with the abrupt increase of the diffusion coefficient of Li cations observed at x=0.4. It is also shown that the clusters of Li cations consist mainly of Li atoms found in the vicinity of NBO atoms. This result explains the higher mobility exhibited by this type of cations compared to the mobility of Li cations in the vicinity of bridging oxygen atoms.
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Affiliation(s)
- Alice Vegiri
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vas. Constantinou Ave., 11635 Athens, Greece.
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Majérus O, Cormier L, Calas G, Beuneu B. Structural Modifications between Lithium-Diborate Glasses and Melts: Implications for Transport Properties and Melt Fragility. J Phys Chem B 2003. [DOI: 10.1021/jp0359945] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Odile Majérus
- Laboratoire de Minéralogie Cristallographie de Paris, CNRS UMR 7590, Universités Paris 6 et Paris 7, Institut de Physique du Globe, 4 place Jussieu, 75252 Paris Cedex 05, France and Laboratoire Léon Brillouin, C.E. Saclay, 91191 Gif sur Yvette, France
| | - Laurent Cormier
- Laboratoire de Minéralogie Cristallographie de Paris, CNRS UMR 7590, Universités Paris 6 et Paris 7, Institut de Physique du Globe, 4 place Jussieu, 75252 Paris Cedex 05, France and Laboratoire Léon Brillouin, C.E. Saclay, 91191 Gif sur Yvette, France
| | - Georges Calas
- Laboratoire de Minéralogie Cristallographie de Paris, CNRS UMR 7590, Universités Paris 6 et Paris 7, Institut de Physique du Globe, 4 place Jussieu, 75252 Paris Cedex 05, France and Laboratoire Léon Brillouin, C.E. Saclay, 91191 Gif sur Yvette, France
| | - Brigitte Beuneu
- Laboratoire de Minéralogie Cristallographie de Paris, CNRS UMR 7590, Universités Paris 6 et Paris 7, Institut de Physique du Globe, 4 place Jussieu, 75252 Paris Cedex 05, France and Laboratoire Léon Brillouin, C.E. Saclay, 91191 Gif sur Yvette, France
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