Speaker
Description
Sodium-ion batteries have recently gained attention as a sustainable alternative to lithium-based systems. However, the use of liquid electrolytes remains a major safety concern, motivating the development of solid-state alternatives. NASICON ceramics, particularly Na3Zr2Si2PO12 (NZSP), exhibit high ionic conductivity and excellent electrochemical stability, thus being strong candidates for solid-state sodium batteries. Nevertheless, conventional processing typically involves sintering temperatures above 1200 °C and long residence times, which involve high energy consumption and environmental impact.
Here, Cold Sintering Process (CSP) is proposed as a low-temperature and energy-efficient alternative for NZSP sintering. In this work, dense ceramics are obtained at 150 °C under 720 MPa, evaluating the effects of powder milling and TLP chemistry. When acetic acid is employed, the resulting samples reach higher ionic conductivity (0.50 mS/cm) compared to those processed with sodium hydroxide (0.25 mS/cm). Additional performance improvements are achieved by incorporating NaPF6 and NaTFSI salts. Composites containing 20% NaPF6 achieve the highest relative density (94.3%) and ionic conductivity (0.80 mS/cm). Moreover, the optimized 2h_20% NaPF6 electrolytes demonstrate stable operation for over 500 hours in symmetric sodium cells, as well as discharge capacities of 85 mAh/g at C/2 and above 100 mAh/g at C/10 after prolonged cycling in half-cell configuration.
| Professional Status of the Speaker | Postdoc |
|---|---|
| Invitation letter for visa | No |
| Interest in submitting a paper in a special issue of | No interest |
