Gallium-Doped Li7La3Zr2O12 Garnet-Type Electrolytes with High Lithium-Ion Conductivity
| Autor: | Lin Liu, Xin Guo, Jiang-Fang Wu, Yao Yu, Yue Wu, Wei Kong Pang, Vanessa K. Peterson, Enyi Chen |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Doping Inorganic chemistry Analytical chemistry chemistry.chemical_element 02 engineering and technology Electrolyte Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Tetragonal crystal system chemistry Formula unit Phase (matter) General Materials Science Lithium Gallium 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 9:1542-1552 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | Owing to their high conductivity, crystalline Li7–3xGaxLa3Zr2O12 garnets are promising electrolytes for all-solid-state lithium-ion batteries. Herein, the influence of Ga doping on the phase, lithium-ion distribution, and conductivity of Li7–3xGaxLa3Zr2O12 garnets is investigated, with the determined concentration and mobility of lithium ions shedding light on the origin of the high conductivity of Li7–3xGaxLa3Zr2O12. When the Ga concentration exceeds 0.20 Ga per formula unit, the garnet-type material is found to assume a cubic structure, but lower Ga concentrations result in the coexistence of cubic and tetragonal phases. Most lithium within Li7–3xGaxLa3Zr2O12 is found to reside at the octahedral 96h site, away from the central octahedral 48g site, while the remaining lithium resides at the tetrahedral 24d site. Such kind of lithium distribution leads to high lithium-ion mobility, which is the origin of the high conductivity; the highest lithium-ion conductivity of 1.46 mS/cm at 25 °C is found to be achi... |
| Databáze: | OpenAIRE |
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