| Autor: |
Matsuki, Yuma, Noi, Kousuke, Deguchi, Minako, Sakuda, Atsushi, Hayashi, Akitoshi, Tatsumisago, Masahiro |
| Zdroj: |
Journal of the Electrochemical Society; January 2019, Vol. 166 Issue: 3 |
| Abstrakt: |
Lithium dissolution/deposition behavior of Al-doped Li7La3Zr2O12(LLZ) was investigated in terms of grain size of LLZ-sintered bodies. One LLZ had smaller grain sizes of primarily less than 1 μm (LLZ_SG), and the other one had larger grain sizes of 5–20 μm (LLZ_LG). The total resistance of a Li symmetric cell using LLZ_SG was smaller than that using LLZ_LG at 100°C. The cell using LLZ_SG was stably cycled at 100°C without short-circuiting at a high current density of 1.3 mA cm−2, while the cell using LLZ_LG was stably cycled at current densities below 0.26 mA cm−2. Stronger bonding at grain boundaries for LLZ_SG was expected to contribute to the improvement of cyclability. |
| Databáze: |
Supplemental Index |
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