Effect of Vanadium Oxide on the Structure and Li-Ion Conductivity of Lithium Silicate GlassesClick to copy article linkArticle link copied!
- Anuraag Gaddam*Anuraag Gaddam*Email: [email protected]. Tel.: +351 234 370 242. Fax: (+351) 234 370 204.CICECO—Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, Santiago University Campus, 3810-193 Aveiro, PortugalMore by Anuraag Gaddam
- Amarnath R. AlluAmarnath R. AlluEnergy Materials and Devices Division, CSIR—Central Glass and Ceramic Research Institute, Kolkata 700 032, IndiaMore by Amarnath R. Allu
- Sudheer GanisettiSudheer GanisettiCICECO—Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, Santiago University Campus, 3810-193 Aveiro, PortugalEnergy Materials and Devices Division, CSIR—Central Glass and Ceramic Research Institute, Kolkata 700 032, IndiaNational Institute of Materials Physics, RO-077125 Magurele, RomaniaUniv. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181—UCCS—Unité de Catalyse et Chimie du Solide, F-59000 Lille, FranceMore by Sudheer Ganisetti
- Hugo R. FernandesHugo R. FernandesCICECO—Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, Santiago University Campus, 3810-193 Aveiro, PortugalMore by Hugo R. Fernandes
- George E. StanGeorge E. StanNational Institute of Materials Physics, RO-077125 Magurele, RomaniaMore by George E. Stan
- Catalin C. NegrilaCatalin C. NegrilaNational Institute of Materials Physics, RO-077125 Magurele, RomaniaMore by Catalin C. Negrila
- Atul P. JamaleAtul P. JamaleCICECO—Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, Santiago University Campus, 3810-193 Aveiro, PortugalMore by Atul P. Jamale
- François MearFrançois MearUniv. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181—UCCS—Unité de Catalyse et Chimie du Solide, F-59000 Lille, FranceMore by François Mear
- Lionel MontagneLionel MontagneUniv. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181—UCCS—Unité de Catalyse et Chimie du Solide, F-59000 Lille, FranceMore by Lionel Montagne
- José M. F. Ferreira*José M. F. Ferreira*Email: [email protected]. Tel.: (+351) 234 370 242. Fax: (+351) 234 370 204.CICECO—Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, Santiago University Campus, 3810-193 Aveiro, PortugalMore by José M. F. Ferreira
Abstract
The commercially ubiquitous liquid electrolytes for lithium-ion batteries have several shortcomings in terms of safety. Therefore, development of solid electrolytes, especially those that are glass-based, has been gaining increasing interest in recent times. However, the fundamental understanding of the changes in the glass structure and the corresponding changes in the properties due to the addition of dopants is necessary for the development of glasses. Therefore, here, we report a study on the role of vanadium on the glass structure, ionic conduction, crystallization behavior, and other properties of lithium silicate-based glasses (23Li2O–2.64K2O–2.64Al2O3–71.72SiO2) as a solid electrolyte for high-temperature Li-ion battery applications. Furthermore, we proposed a mathematical model to describe/quantify the ion-conducting channels’ connectivity in glasses. The experimental glass structures were assessed using 29Si, 51V, 27Al nuclear magnetic resonance, Fourier transform infrared, and ultraviolet–visible spectroscopy techniques. The ionic conductivity was measured by impedance spectroscopy, and the crystallization behavior was studied by optical microscopy and X-ray diffraction. Furthermore, molecular dynamics simulations were also used to gain structural insights of the glasses. In the designed compositions, the addition of vanadium decreased the overall concentration of Li+ ions. However, the results revealed that the ionic conductivity improved with the addition of vanadium in spite of a decrease in the number of charge carriers. This suggests that vanadium makes the pathways easier for the conducting ions. Thus, we conclude that vanadium modifies the conduction channels to promote better hoping of the ions from one site to another.
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