Effect of lithium isotopes on the phase transition in NASICON-type lithium-ion conductor LiZr2(PO4)3
| Autor: | Daisuke Mori, Minoru Ikeda, Kazutaka Mitsuishi, Takahisa Ohno, Yoshiyuki Inaguma, Koichiro Ueda, Koki Funayama, Akihisa Aimi, Hamasaki Yosuke |
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| Rok vydání: | 2018 |
| Předmět: |
Phase transition
Materials science Isotopes of lithium Analytical chemistry chemistry.chemical_element 02 engineering and technology General Chemistry Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Differential scanning calorimetry chemistry Electron diffraction Phase (matter) Fast ion conductor General Materials Science Lithium 0210 nano-technology |
| Zdroj: | Solid State Ionics. 321:29-33 |
| ISSN: | 0167-2738 |
| Popis: | Polycrystalline NASICON-type Li-ion conductor LiZr2(PO4)3 (LZPO) with different ratios of Li isotopes, namely 6LiZr2(PO4)3 (6-LZPO), 7LiZr2(PO4)3 (7-LZPO), and LZPO with the natural Li isotope ratio (n-LZPO), has been synthesized by a conventional solid state reaction. The phase transformation as a function of temperature between the low-temperature triclinic phase, which exhibits lower Li-ion conductivity, and high-temperature rhombohedral phase, which exhibits higher Li-ion conductivity, has been evaluated by powder X-ray diffraction (XRD), electron diffraction, and differential scanning calorimetry (DSC) measurements. According to XRD and DSC measurements, the phase transition temperature decreases in the order 6-LZPO > n-LZPO ≈ 7-LZPO. The dependence of phase transition temperature on the Li isotope implies that Li ions have a strong effect on phase stability. The phase transition is primarily related to the change in configuration entropy of Li ions in LZPO. |
| Databáze: | OpenAIRE |
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