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Abstract <p>In continuation of the search for new materials for the development of all-solid-state lithium and lithium-ion batteries, we have synthesized solid electrolyte Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> having lithium-cation conduction and a NASICON-type structure by glass crystallization and lithium–vanadium bronze Li<sub>1.3</sub>V<sub>3</sub>O<sub>8</sub> by the interaction of lithium carbonate and NH<sub>4</sub>VO<sub>3</sub> in an aqueous solution followed by heat treatment at 400°C. The thermal stability of the synthesized materials and their chemical resistance toward each other are investigated. For this purpose, mixtures of the solid electrolyte and the bronze are held for 15 h at various temperatures from room temperature to 500°C, and their phase compositions are then studied by X-ray diffraction (XRD). XRD shows no chemical interaction between the electrolyte and the bronze up to 300°C inclusive. At higher temperatures (350°C), reflections of lithium metavanadate first appear on X-ray diffraction patterns; after isothermal holding at 470–500°C, the phase compositions of the mixtures include a number of interaction products, the main of which is Li<sub>2</sub>PVO<sub>6</sub>. Thus, according to the obtained results, the materials under study can be recommended as components for the development of medium-temperature all-solid-state lithium-ion batteries.</p>

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Stability of Solid Lithium-Conducting Electrolyte Li1.5Al0.5Ge1.5(PO4)3 in Contact with Lithium–Vanadium Bronze LiV3O8

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • G. Sh. Shekhtman,
  • S. V. Pershina,
  • M. S. Shchelkanova,
  • T. A. Kuznetsova

摘要

Abstract

In continuation of the search for new materials for the development of all-solid-state lithium and lithium-ion batteries, we have synthesized solid electrolyte Li1.5Al0.5Ge1.5(PO4)3 having lithium-cation conduction and a NASICON-type structure by glass crystallization and lithium–vanadium bronze Li1.3V3O8 by the interaction of lithium carbonate and NH4VO3 in an aqueous solution followed by heat treatment at 400°C. The thermal stability of the synthesized materials and their chemical resistance toward each other are investigated. For this purpose, mixtures of the solid electrolyte and the bronze are held for 15 h at various temperatures from room temperature to 500°C, and their phase compositions are then studied by X-ray diffraction (XRD). XRD shows no chemical interaction between the electrolyte and the bronze up to 300°C inclusive. At higher temperatures (350°C), reflections of lithium metavanadate first appear on X-ray diffraction patterns; after isothermal holding at 470–500°C, the phase compositions of the mixtures include a number of interaction products, the main of which is Li2PVO6. Thus, according to the obtained results, the materials under study can be recommended as components for the development of medium-temperature all-solid-state lithium-ion batteries.