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...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/14/22/6904 |
| _version_ | 1797509504635502592 |
|---|---|
| author | Georgiy Sh. Shekhtman Anastasia V. Kalashnova Boris D. Antonov |
| author_facet | Georgiy Sh. Shekhtman Anastasia V. Kalashnova Boris D. Antonov |
| author_sort | Georgiy Sh. Shekhtman |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T05:19:40Z |
| format | Article |
| id | doaj.art-5615e4e763c3495abf5d98954250b3cd |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:19:40Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-5615e4e763c3495abf5d98954250b3cd2023-11-23T00:10:37ZengMDPI AGMaterials1996-19442021-11-011422690410.3390/ma14226904Lithium-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) SystemsGeorgiy Sh. Shekhtman0Anastasia V. Kalashnova1Boris D. Antonov2Institute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, 20 Akademicheskaya St., 620990 Ekaterinburg, RussiaInstitute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, 20 Akademicheskaya St., 620990 Ekaterinburg, RussiaInstitute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, 20 Akademicheskaya St., 620990 Ekaterinburg, RussiaLi<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.https://www.mdpi.com/1996-1944/14/22/6904solid electrolyteslithium zirconateslithium cation conductivitycrystal structureglycine-nitrate synthesisheterovalent doping |
| spellingShingle | Georgiy Sh. Shekhtman Anastasia V. Kalashnova Boris D. Antonov 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 Materials solid electrolytes lithium zirconates lithium cation conductivity crystal structure glycine-nitrate synthesis heterovalent doping |
| title | 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 |
| title_full | 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 |
| title_fullStr | 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 |
| title_full_unstemmed | 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 |
| title_short | 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 |
| title_sort | 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 |
| topic | solid electrolytes lithium zirconates lithium cation conductivity crystal structure glycine-nitrate synthesis heterovalent doping |
| url | https://www.mdpi.com/1996-1944/14/22/6904 |
| work_keys_str_mv | AT georgiyshshekhtman lithiumcationconductivityofsolidsolutionsinlisub6xsubzrsub2xsubasubxsubosub7subanbtasystems AT anastasiavkalashnova lithiumcationconductivityofsolidsolutionsinlisub6xsubzrsub2xsubasubxsubosub7subanbtasystems AT borisdantonov lithiumcationconductivityofsolidsolutionsinlisub6xsubzrsub2xsubasubxsubosub7subanbtasystems |