2.3 Sodium Iron Pyrophosphate NFPP Sodium Ion Battery Cathode Material
Model:NFPP
Chemical Formula:Na₄Fe₃(PO₄)₂P₂O₇
Purity:≥99.9% (4N grade)
Tap Density:2.3 ± 0.1 g/cm³
article Size (D50):6–12 μm
Specific Surface Area:≤10 m²/g
0.1C Capacity:≥105 mAh/g
1C Capacity:≥95 mAh/g
MOQ: 10g
Leading time: 5-7 working days
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
- Raw material cost: ~3.5k/ton for layered oxides).
- Low sintering temperature (550–650°C vs. 900°C for oxides).
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- Safety & Environmental Benefits.
- Non-toxic, non-flammable, and free of critical metals (Co, Ni).
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.