BN-P2C P/O Composite Sodium Ion Battery Cathode Material Sodium Nickel Iron Manganese Oxide
Na:17.1±0.3%
Ni: 12.6±0.3%
Fe:12.0±0.3%
Mn:23.6±0.3%
D10: 5.5±0.5um
D50: 9.5±0.5um
D90: 17.5±0.5um
Tap density: ≥1.2g/cm³
MOQ: 10g
Leading time: 5-8days
Sodium Nickel Iron Manganese Oxide BN-P2C P/O Composite Sodium Ion Battery Cathode Material
Overview
BN-P2C is a P/O hybrid-phase layered oxide cathode material with the general formula NaNiₓFeᵧMn₁₋ₓ₋ᵧO₂, where P2 (trigonal prismatic Na⁺ sites) and O3 (octahedral Na⁺ sites) phases coexist. This dual-phase structure synergizes the advantages of both phases: P2 offers fast Na⁺ diffusion and structural stability, while O3 provides higher Na⁺ content and capacity.
Key Features
- Structure & Composition:
- P2/O3 intergrowth mitigates irreversible phase transitions during cycling, enhancing structural integrity.
- Transition metals (Ni, Fe, Mn) balance cost and performance: Ni boosts capacity, Mn stabilizes the framework, and Fe reduces costs.
- Performance Advantages:
- High reversible capacity: ~130–140 mAh/g at 0.1C, with stable output at 1C (~120 mAh/g).
- Improved cyclability: Hybrid-phase interfaces suppress layer sliding and volume changes, achieving >90% capacity retention after 50 cycles.
- Enhanced kinetics: P2-phase channels accelerate Na⁺ diffusion, enabling better rate capability.
- Challenges & Optimization:
- Air sensitivity: Surface residual alkali (e.g., NaOH) requires protective coatings (e.g., Al₂O₃, NaTi₂(PO₄)₃).
- High-voltage instability: Doping (e.g., Ti, Mg) stabilizes the lattice above 4.0 V vs. Na⁺/Na.
Applications
BN-P2C is tailored for large-scale energy storage (grid storage, EVs) due to its low cost, compatibility with existing manufacturing, and balanced energy/power density. Ongoing research focuses on entropy engineering and morphology control to further improve performance.
Specifications
| Item | Unit | Specification | Value | Reference Standard | Test Equipment Model |
|---|---|---|---|---|---|
| Na | wt% | 17.1±0.3 | 16.9 | GB/T 27598-2011 | Agilent 5800 |
| Ni | wt% | 12.6±0.3 | 12.7 | – | – |
| Fe | wt% | 12.0±0.3 | 12.1 | – | – |
| Mn | wt% | 23.6±0.3 | 23.5 | – | – |
| D10 | μm | 5.5±0.5 | 5.6 | GB/T 19077-2016 | Mastersizer 3000 (AERO S, dry method) |
| D50 | μm | 9.5±0.5 | 9.9 | GB/T 19077-2016 | – |
| D90 | μm | 17.5±0.5 | 17.9 | GB/T 5162-202X | – |
| Tap density | g/cm³ | ≥1.2 | 1.45 | – | Micromeritics TriStar 3030 |
| SSA | m²/g | – | – | GB/T 19587-2004 | Micromeritics GeoPyc 1365 |
| 2TPD | g/cm³ | – | – | GB/T 24533-2019 | MYCRO Carver 4350 |
| 0.1C capacity | mAh/g | 130±2 | 130.2 | Half-cell evaluation method | – |
| First-cycle efficiency | % | ≥95 | 96.3 | Electrolyte: 1M NaPF6 in diglyme | – |
| 1C reversible capacity | mAh/g | 120±2 | 118.4 | Voltage window: 2.0-4.1V | – |
| 50th retention | % | ≥95 | 97.9 | – | – |