High-pressure Compaction 2.3 Sodium Iron Pyrophosphate NFPP Sodium Ion Battery Cathode Material Solid-state Sodium Battery
Product Overview
High-tap-density (2.3 g/cm³) Na₄Fe₃(PO₄)₂P₂O₇ (NFPP) is an advanced polyanionic cathode material for solid-state sodium-ion batteries, offering exceptional structural stability, high volumetric energy density, and ultra-long cycle life (>4,000 cycles). Its unique 3D open-framework architecture enables efficient Na⁺ diffusion, making it ideal for high-performance solid-state batteries in grid storage and EV applications.
Key Specifications
| Property |
Specification |
Typical Value |
| Chemical Formula |
Na₄Fe₃(PO₄)₂P₂O₇ |
- |
| Purity |
≥99.9% |
99.99% (4N grade) |
| Tap Density |
2.3 ± 0.1 g/cm³ |
2.3 g/cm³ |
| Particle Size (D50) |
6–12 μm |
9 μm |
| Specific Surface Area |
≤10 m²/g |
8 m²/g |
| 0.1C Capacity |
≥105 mAh/g |
105–110 mAh/g |
| 1C Capacity |
≥95 mAh/g |
95–100 mAh/g |
| Voltage Platform |
3.0–3.2 V (vs. Na⁺/Na) |
3.1 V |
| Cycle Life |
>4,000 cycles (100% DoD) |
>6,000 cycles (80% DoD) |
| Thermal Stability |
Stable up to 400°C |
No thermal runaway |
Material Advantages
-
High Volumetric Energy Density
- Ultra-high tap density (2.3 g/cm³) enables compact electrode design, critical for solid-state batteries.
- Theoretical capacity: 129 mAh/g (3 Na⁺ intercalation).
-
Solid-State Compatibility
- Minimal volume change (<4%) during cycling, reducing interfacial stress with solid electrolytes.
- Stable with sulfide/oxide solid electrolytes (e.g., Na₃PS₄, Na₃Zr₂Si₂PO₁₂).
-
Cost-Effectiveness
Applications
- Solid-State Sodium Batteries: Grid-scale storage, EV power packs.
- Low-Temperature Operations: Stable performance at -20°C.
- High-Safety Systems: Aerospace, medical devices.
