التفاصيل البيبلوغرافية
| العنوان: |
Calcium Doped NASICON Electrolyte with Graphite Coating for Stable All‐solid‐state Sodium Metal Batteries. |
| المؤلفون: |
Jia, Jing, Liu, Tinghu, Li, Yunming, Yang, Jing, He, Hao, Zhu, Xiaoning, Yao, Xiayin |
| المصدر: |
ChemSusChem; 9/9/2024, Vol. 17 Issue 17, p1-7, 7p |
| مصطلحات موضوعية: |
CONDUCTIVITY of electrolytes, IONIC conductivity, SOLID electrolytes, IONIC crystals, CURRENT distribution, SUPERIONIC conductors |
| مستخلص: |
All‐solid‐state sodium metal batteries face the challenges of low ionic conductivity of solid electrolytes and poor wettability towards metallic Na anode. Herein, Na3Zr2Si2PO12 solid electrolyte is doped with Ca2+, obtaining a high ionic conductivity of 2.09×10−3 S cm−1 with low electronic conductivity of 1.43×10−8 S cm−1 at room temperature, which could accelerate Na+ transportation and suppress sodium dendrite growth. Meanwhile, a graphite‐based interface layer is coated on Na3.4Zr1.8Ca0.2Si2PO12 (Na3.4Zr1.8Ca0.2Si2PO12‐G) in order to improve the solid‐solid contact between solid electrolyte and Na anode, realizing a uniform current distribution and smooth Na metal plating/stripping, and thus achieving a triple higher critical current density of 3.5 mA cm−2 compared with that of Na3.4Zr1.8Ca0.2Si2PO12. In addition, the assembled Na3V2(PO4)3/Na3.4Zr1.8Ca0.2Si2PO12‐G/Na all‐solid‐state battery exhibits excellent electrochemical performances with a reversible capacity of 81.47 mAh g−1 at 1 C and capacity retention of 97.75 % after 500 cycles. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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