1. Na3Zr2Si2PO12 solid electrolyte with Bi2O3 as sintering aid for solid-state sodium batteries.
- Author
-
Le, Shiru, Chi, Dazhao, Li, Yunlong, Song, Shuhuan, Fan, Lishuang, Mao, Yachun, and An, Maozhong
- Subjects
SOLID electrolytes ,SUPERIONIC conductors ,SILICON nitride ,MELTING points ,IONIC conductivity ,SODIUM ,SINTERING - Abstract
Improving the density of Na
3 Zr2 Si2 PO12 (NZSP) solid electrolyte is crucial for its application in solid-state sodium batteries. Here, bismuth oxide with low melting point has been evaluated as a sintering aid for NZSP solid electrolytes. Research has found that NZSP doped with 5 mass% Bi2 O3 increases grain boundary mobility by 3.1 times and has an ionic conductivity of 4.78 × 10−3 S cm−1 , with a minimum activation energy of 0.30 eV, approximately 5 times that of undoped Bi2 O3 . This is because the electrolyte density increased from 77.3 to 93.7%. Compared with the region III process of NZSP without Bi2 O3 , Bi2 O3 promotes the densification process of Bi2 O3 dopant coarsening in region III. The constant current cycle of Na | NZSP-5 mass% Bi2 O3 | Na symmetric battery indicates that no short circuit will occur within 1200 h. The discharge capacity of solid-state batteries at 0.2 C is 98.5 mAh g−1 . This indicates that NZSP doped with 5% Bi2 O3 is a good electrolyte choice for sodium-ion batteries. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF