Optimization of the Compositions of Solid Electrolytes Cd1 – xRxF2 + x (R = La–Lu, Y) with a Fluorite-Type Structure for Conductivity and Thermal Stability
- 作者: Sorokin N.1, Sobolev B.1
-
隶属关系:
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,” Russian Academy of Sciences
- 期: 卷 64, 编号 5 (2019)
- 页面: 768-773
- 栏目: Physical Properties of Crystals
- URL: https://journals.rcsi.science/1063-7745/article/view/194207
- DOI: https://doi.org/10.1134/S1063774519050195
- ID: 194207
如何引用文章
详细
Optimization of the compositions of Cd1–xRxF2+x nonstoichiometric phases (CaF2 type, R is a rare-earth element) for the ionic conductivity and thermal stability is based on the temperature measurements of the electrical conductivity of single crystals depending on the R3+ ionic radii and RF3 content and on the investigation of phase diagrams of the CdF2–RF3 systems. It is shown that the conductivity of 20 compositions out of 30 studied Cd1–xRxF2+x crystals exceeds the conditional limit σ500K = 10–5 S/cm, below which the use of solid electrolytes in electrochemical devices is believed to be undesirable because of low conductivity. The maximum conductivities σ500K = (3.0–3.2) × 10–4 S/cm and σ293K = (1.5–2.3) × 10–8 S/cm are observed for solid electrolytes with R = Ho, Er, Tm, or Yb and x = 0.22–0.27.
作者简介
N. Sorokin
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
编辑信件的主要联系方式.
Email: nsorokin1@yandex.ru
俄罗斯联邦, Moscow, 119333
B. Sobolev
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics,”Russian Academy of Sciences
Email: nsorokin1@yandex.ru
俄罗斯联邦, Moscow, 119333