High ionic conducting rare-earth silicate electrolytes for sodium metal batteries

Sivakumaran, Abinaya; Samson, Alfred Junio; Bristi, Afshana Afroj; Surendran, Vishnu; Butler, Shantel; Reid, Samuel; Thangadurai, Venkataraman

doi:10.1039/d3ta02128a

Cited by 3 publications

(1 citation statement)

References 74 publications

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“…Shannon et al were the first to report the ionic conductivity and determine the true crystal structure of these compounds . These phases generated a lot of interest recently. − Shannon et al prepared a series of compounds by substituting M with various elements (M = Fe, Sc, Y, and rare earth Lu–Sm). They found that the ionic conductivity increased linearly with the ionic radii of the M 3+ ion in the structure.…”

Section: Introductionmentioning

confidence: 99%

Reinvestigation of Na₅GdSi₄O₁₂: A Potentially Better Solid Electrolyte than Sodium β Alumina for Solid-State Sodium Batteries

Michalak,

Behara,

2024

ACS Appl. Mater. Interfaces

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Developing high-performing solid electrolytes that could replace flammable organic liquid electrolytes is vital in designing safer solid-state batteries. Among the sodium-ion (Na + ) conducting solid electrolytes, Na-β″-alumina (BASE) is highly regarded for its employment in solid-state battery applications due to its high ionic conductivity and electrochemical stability. BASE has long been employed in commercial Na−NiCl 2 and Na−S batteries. However, the synthesis of highly conductive BASE is energy-intensive, involving elevated temperatures for sintering and the incorporation of stabilizing additives. Additionally, BASE is highly sensitive to humidity, which limits its applications. Hence, there is an intense search to identify suitable high-performing solid electrolytes that could replace BASE. In this context, we reinvestigated Na 5 GdSi 4 O 12 (NGS) and demonstrated that phase pure NGS could be synthesized by a simple solid-state reaction. Beyond a high ionic conductivity of 1.9 × 10 −3 S cm −1 at 30 °C (1.5 × 10 −3 S cm −1 for BASE), NGS exhibited high chemical as well as electrochemical stability, lower interfacial resistance, lower deposition and stripping potential, and higher short-circuiting current, designating NGS as a better solid electrolyte than BASE.

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Section: Introductionmentioning

confidence: 99%

Reinvestigation of Na₅GdSi₄O₁₂: A Potentially Better Solid Electrolyte than Sodium β Alumina for Solid-State Sodium Batteries

Michalak,

Behara,

2024

ACS Appl. Mater. Interfaces

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SiO2 for electrochemical energy storage applications

Lei,

Li,

Ding

et al. 2024

Journal of Power Sources

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Atomistic Simulation Studies of Na4SiO4

Shanika,

Abiman,

Iyngaran

et al. 2024

Crystals

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Tetrasodium silicate (Na4SiO4) has emerged as a promising candidate for battery applications due to its favorable ionic transport properties. Atomic-scale simulations employing classical pair potentials have elucidated the defect mechanisms and ion migration dynamics in Na4SiO4. The Na Frenkel defect, characterized by the creation of a Na vacancy and an interstitial Na⁺ ion, is identified as the most energetically favorable defect process, facilitating efficient vacancy-assisted Na⁺ ion migration. This process results in three-dimensional ion diffusion with a low activation energy of 0.55 eV, indicating rapid ion movement within the material. Among monovalent dopants (Li⁺, K⁺, and Rb⁺), K⁺ was found to be the most advantageous for substitution on the Na site. For trivalent doping, Al is the most favorable on the Si site, generating additional Na⁺ ions and potentially enhancing ionic conductivity. Ge was identified as a promising isovalent dopant for the Si site. These theoretical findings suggest that Na4SiO4 could offer high ionic conductivity and stability when optimized through appropriate doping. Experimental validation of these predictions could lead to the development of advanced battery materials with improved performance and durability.

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High ionic conducting rare-earth silicate electrolytes for sodium metal batteries

Abstract: Sodium gadolinium silicate solid electrolyte showed an outstanding sodium plating/stripping performance for 1000 cycles that proves excellent interfacial contact between the sodium anode and solid electrolyte.

Cited by 3 publications

References 74 publications

Reinvestigation of Na₅GdSi₄O₁₂: A Potentially Better Solid Electrolyte than Sodium β Alumina for Solid-State Sodium Batteries

Reinvestigation of Na₅GdSi₄O₁₂: A Potentially Better Solid Electrolyte than Sodium β Alumina for Solid-State Sodium Batteries

SiO2 for electrochemical energy storage applications

Atomistic Simulation Studies of Na4SiO4

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High ionic conducting rare-earth silicate electrolytes for sodium metal batteries

Abstract: Sodium gadolinium silicate solid electrolyte showed an outstanding sodium plating/stripping performance for 1000 cycles that proves excellent interfacial contact between the sodium anode and solid electrolyte.

Cited by 3 publications

References 74 publications

Reinvestigation of Na5GdSi4O12: A Potentially Better Solid Electrolyte than Sodium β Alumina for Solid-State Sodium Batteries

Reinvestigation of Na5GdSi4O12: A Potentially Better Solid Electrolyte than Sodium β Alumina for Solid-State Sodium Batteries

SiO2 for electrochemical energy storage applications

Atomistic Simulation Studies of Na4SiO4

Contact Info

Product

Resources

About

Reinvestigation of Na₅GdSi₄O₁₂: A Potentially Better Solid Electrolyte than Sodium β Alumina for Solid-State Sodium Batteries

Reinvestigation of Na₅GdSi₄O₁₂: A Potentially Better Solid Electrolyte than Sodium β Alumina for Solid-State Sodium Batteries