Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7898811 | Journal of the European Ceramic Society | 2018 | 6 Pages |
Abstract
The elements Nb and Y were simultaneously substituted to the Zr sites of an Li7La3Zr2O12 (LLZO) electrolyte to improve its Li-ion conductivity and air stability. Samples of Li7La3Zr2-2xNbxYxO12 were fabricated using a solid-state reaction method. The results show that the introduction of Nb and Y can stabilise cubic-phase LLZO. The total conductivity of Li7La3ZrNb0.5Y0.5O12 electrolyte can reach 8.29 Ã 10â4 S cmâ1 at 30 °C when sintered at 1230 °C for only 15 h. Surprisingly, the conductivity of Li7La3ZrNb0.5Y0.5O12 can be maintained at 6.91 Ã 10â4 S cmâ1 after exposure to air for 1.5 months, indicating excellent air stability. Furthermore, a LiFePO4/Li7La3ZrNb0.5Y0.5O12/Li cell displayed stable charge/discharge and cycling performance at ambient temperature, suggesting there is potential to use Li7La3ZrNb0.5Y0.5O12 electrolyte in Li-ion batteries. Additionally, the effects of varying the co-doping amount and dwelling time on the Li-ion conductivity of Li7La3Zr2-2xNbxYxO12 were investigated.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Jianli Gai, Erqing Zhao, Furui Ma, Deye Sun, Xiaodi Ma, Yongcheng Jin, Qingliu Wu, Yongjie Cui,