Lithium-Cation Conductivity of Solid Solutions in Li<sub>6-x</sub>Zr<sub>2-x</sub>A<sub>x</sub>O<sub>7</sub> (A = Nb, Ta) Systems
Li<sub>6-x</sub>Zr<sub>2-x</sub>AxO<sub>7</sub> (A = Nb; Ta) system with 0 < x < 0.30 is synthesized by glycine-nitrate method. Boundaries of solid solutions based on monoclinic Li<sub>6</sub>Zr<sub>2</sub>O<sub>7</sub> ar...
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| Autores principales: | , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/5615e4e763c3495abf5d98954250b3cd |
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| Sumario: | Li<sub>6-x</sub>Zr<sub>2-x</sub>AxO<sub>7</sub> (A = Nb; Ta) system with 0 < x < 0.30 is synthesized by glycine-nitrate method. Boundaries of solid solutions based on monoclinic Li<sub>6</sub>Zr<sub>2</sub>O<sub>7</sub> are determined; temperature (200–600 °C) and concentration dependences of conductivity are investigated. It is shown that monoclinic Li<sub>6</sub>Zr<sub>2</sub>O<sub>7</sub> exhibits better transport properties compared to its triclinic modification. Li<sub>5.8</sub>Zr<sub>1.8</sub>Nb(Ta)<sub>0.2</sub>O<sub>7</sub> solid solutions have a higher lithium-cation conductivity at 300 °C compared to solid electrolytes based on other lithium zirconates due the “open” structure of monoclinic Li<sub>6</sub>Zr<sub>2</sub>O<sub>7</sub> and a high solubility of the doping cations. |
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