High Capacity Prussian White Cathode Material For Sodium Ion Batteries

High-Capacity Prussian White (NaₓFe[Fe(CN)₆]) Cathode Material for Sodium-Ion Batteries

​1. Introduction​​

Prussian White (PW, NaₓFe[Fe(CN)₆]) is a ​​low-cost, high-capacity cathode material​​ for sodium-ion batteries (SIBs). As a derivative of Prussian blue analogs (PBAs), it leverages an open framework structure with ​​fast Na⁺ diffusion​​ and ​​excellent structural stability​​, making it ideal for ​​large-scale energy storage systems​​.

​​2. Key Features​​​

• ​​Chemical Formula​​: NaₓFe[Fe(CN)₆] (typically 1.6 ≤ x ≤ 2.0 for full Na⁺ insertion)
• ​​Crystal System​​: Cubic (Fm-3m space group)
• ​​Framework​​: Open 3D channels enable rapid Na⁺ migration (10⁻¹⁰–10⁻¹¹ cm²/s diffusion coefficient).

3. Technical Specifications & Test Data​​

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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).

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