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Overview of Biphasic Layered Oxide Cathode Materials for Sodium Ion Batteries
Biphasic Layered Oxide Cathode Materials represent a cutting-edge advancement in sodium-ion battery technology, engineered to overcome the limitations of single-phase O3 or P2-type structures. These innovative materials intelligently integrate two distinct crystalline phases (such as P2/O3 or P2/O’3) within a single particle. This unique biphasic structure creates a synergistic effect, where one phase provides high specific capacity and the other ensures exceptional structural stability and smooth sodium-ion kinetics during deep charge/discharge cycles. The result is a superior cathode material that delivers an outstanding balance of high energy density, دورة حياة طويلة, and excellent rate capability, making it ideal for next-generation, high-performance sodium-ion batteries.
Features of Biphasic Layered Oxide Cathode Materials for Sodium Ion Batteries
- Superior Structural Stability: The complementary nature of the two phases mitigates detrimental phase transitions, significantly enhancing the material’s cycling longevity.
- High Energy Density: Engineered to deliver high discharge capacities (على سبيل المثال, up to 155 مللي أمبير/ز) and competitive average voltages, resulting in high gravimetric energy density.
- Enhanced Kinetics: The biphasic interface can facilitate improved sodium-ion diffusion, resulting in better rate performance and faster charging.
- Optimised Electrochemical Performance: Offers a stable voltage profile and high first-cycle efficiency due to the stabilised structure.
- Compositional Versatility: Our series (على سبيل المثال, Z-NNFM, Z-NNCM) allows for tuning the biphasic structure to optimise for specific performance metrics like power, energy, or cost
Applications of Biphasic Layered Oxide Cathode Materials for Sodium Ion Batteries
- High-Performance Electric Vehicles (المركبات الكهربائية) require long range and durability
- Large-Scale Grid Energy Storage Systems (وفاق سطيف) demand long cycle life and reliability
- Advanced Consumer Electronics such as power-intensive laptops and drones
- Industrial Power Tools and equipment needing high power and robust performance
- Renewable Energy Integration and backup power systems
Specification Table of Biphasic Layered Oxide Cathode Materials (Example: Z-NNFM)
| Parameter | Unit | القيمة النموذجية (Z-NNFM) |
|---|---|---|
| Particle Size (د50) | μm | 5.0 |
| Tap Density | g/cm³ | 2.3 – 2.5 |
| Compacted Density | g/cm³ | 3.4 – 3.7 |
| Specific Surface Area | m²/g | 0.7 – 1.0 |
| Discharge Specific Capacity (0.1ج) | مللي أمبير/ز | 125 – 145 |
| Average Voltage | V | 3.1 – 3.3 |
| Energy Density | Wh/kg | 380 – 420 |
| Crystal Structure | – | P2/O3 Biphasic |
FAQs of Biphasic Layered Oxide Cathode Materials for Sodium Ion Batteries
1. What is the key advantage of a biphasic structure over a single-phase material?
The primary advantage is the combination of high capacity (often from the O3-type phase) and excellent structural stability (often from the P2-type phase). This synergy reduces volume changes and harmful phase transitions during cycling, resulting in a much longer-lasting battery than single-phase cathodes.
2. How is the biphasic structure formed and controlled?
The biphasic structure is carefully engineered during the high-temperature synthesis process by precisely controlling the chemical composition (على سبيل المثال, Na content, transition metal ratios) and sintering conditions. This allows for the targeted formation of two intergrown, stable phases.
3. Are these materials compatible with existing electrode manufacturing processes?
نعم. These materials are supplied with optimised physical properties, including controlled particle size distribution and high density, making them fully compatible with standard slurry mixing, coating, and calendering processes used in lithium-ion battery manufacturing.
4. How does the energy density compare to other sodium-ion cathode types?
Biphasic layered oxides are among the highest-performing sodium-ion cathodes. They typically offer higher energy densities than Prussian blue analogues and polyanionic compounds, and improved cycling stability compared to many single-phase layered oxides, striking a top-tier balance.
5. Can the properties be tailored for specific applications?
قطعاً. Our product series includes various compositions (على سبيل المثال, Z-NNFM for cost-effectiveness, Z-NNCM for higher capacity). By selecting different material codes, customers can choose a cathode optimised for their specific needs, whether it’s maximum energy, power, or cycle life.
