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Development of crystallized glass for ultra-low melting solid-state battery electrolytes

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2025, 35(2), pp.43~48
  • DOI : 10.6111/JKCGCT.2025.35.2.043
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : April 1, 2025
  • Accepted : May 7, 2025
  • Published : June 30, 2025

Yongpil Cho 1 Jeong Ho Cho 1 Minsung Hwang 1 Jaeyeop Chung 1

1한국세라믹기술원

Accredited

ABSTRACT

In this study, we successfully synthesized a glass-ceramic with LiVO₃ crystalline phases via heat treatment of Li₂Cl₂-Li₂O-B₂O₃-V₂O₅-based glass, a composition not previously reported for solid-state electrolytes. Thermal properties were measured using differential thermal analysis (DTA), and kinetics analysis was conducted based on these data. As indicated by XRD patterns, the as-prepared sample exhibited the characteristic halo pattern of glass, while the formation of crystalline phases was observed with increasing heat treatment time, identified as LiVO₃. The intensity of the LiVO₃ peaks in the XRD pattern increased with extended heat treatment, eventually reaching saturation. Additionally, ionic conductivity was observed to improve, likely due to the facilitation of Li-ion conduction within the LiVO₃ crystals. The activation energy for LiVO₃ crystallization within the glass matrix was determined to be 190 kJ/mol (Kissinger method) and 203 kJ/mol (Marotta method) based on DTA analysis. The Ozawa exponent, derived via the Ozawa method, suggested one-dimensional growth of the LiVO₃ crystals.

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