Shchelkanova M, Shekhtman G, Pershina S, Vovkotrub E. Physico-Chemical Properties of NaV
3O
8 Prepared by Solid-State Reaction.
MATERIALS (BASEL, SWITZERLAND) 2021;
14:6976. [PMID:
34832378 PMCID:
PMC8619317 DOI:
10.3390/ma14226976]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/06/2021] [Accepted: 11/10/2021] [Indexed: 11/17/2022]
Abstract
Sodium-vanadium oxide NaV3O8 is synthesized via solid-state method and optimum synthesis conditions are chosen based on the data of DSC and TG analysis. The material synthesized is characterized by X-ray phase analysis, Raman spectroscopy and scanning electron microscopy. The ratio V4+/V5+ in the sample obtained is determined by X-ray photoelectron spectroscopy. Conductivity of the material synthesized was measured by impedance spectroscopy, pulse potentiometry and DC method over the range RT-570 °C. It is shown that NaV3O8 has rather high conductivity essentially electron in type (6.3 × 10-2 at room temperature). AC and DC conductivity measurements are performed and cycling of symmetricNaV3O8|Na3.85Zr1.85Nb0.15Si3O12|NaV3O8 cell in galvanostatic conditions. Thermal stability is studied across 25-570 °C temperature range. The results obtained are compared with the properties of NaV3O8 produced via aqueous solution.
Collapse