Prussian White Sodium-Ion Cathode Material 145mAh/g Specific Capacity D50 0.8μm
1. Applications
- Grid-Scale Storage: 4-hour discharge systems (cost <$100/kWh).
- EV Backup Power: Secondary battery systems for low-temperature operation.
- Consumer Electronics: Replacement for LiFePO₄ in low-cost devices.
2. Optimization Strategies
- Carbon Coating: Improves electronic conductivity (e.g., glucose-derived carbon layer).
- Vacuum Drying: Reduces lattice water to enhance cycling stability.
- Mn Substitution: NaₓFeMn[Fe(CN)₆] boosts voltage to 3.4 V (Mn²⁺/Mn³⁺ redox).
3. Technical Specifications & Test Data
| No. |
Item |
Requirement |
Test Method |
Result |
| 1 |
Packaging |
Sealed container |
Visual inspection |
Compliant |
| 2 |
Appearance |
Light gray-white powder, free of impurities, agglomeration, or large particles |
Visual inspection |
Compliant |
| 3 |
D10 (μm) |
0.39 |
Laser particle analyzer |
Compliant |
| 4 |
D50 (μm) |
0.80 |
Laser particle analyzer |
Compliant |
| 5 |
D90 (μm) |
1.6 |
Laser particle analyzer |
Compliant |
| 6 |
Tap Density (g/cm³) |
0.6 |
Tap density tester |
0.8 |
| 7 |
Specific Surface Area (m²/g) |
6.25 |
BET nitrogen adsorption |
6.41 |
| 8 |
Na Content (%) |
27±1% |
ICP-OES |
27.7% |
| 9 |
Fe+Mn Content (%) |
55±1% |
ICP-OES |
55.2% |
| 11 |
Specific Capacity (mAh/g) |
158 |
Coin cell half-cell test |
145 |
| 12 |
SEM |
3,000× magnification |
Provided during R&D phase |
Compliant |
4. Material Advantages
✅ Ultra-Low Cost: Iron/cyanide-based precursors reduce raw material expenses by ~60% vs. layered oxides.
✅ High Safety: Strong Fe-C≡N bonds suppress thermal runaway risks.
✅ Scalable Synthesis: Simple co-precipitation process (room temperature, aqueous solutions).
