Aluminum Laminated Film

Aluminum oxide ceramic separators are fabricated by coating a nanoscale aluminum oxide (Al₂O₃) layer onto a substrate of PP, PE, or multi-layer composite separators through special processes. This design significantly enhances the high-temperature resistance and safety of lithium-ion batteries.

Aluminum oxide ceramic separators are critical components for lithium-ion batteries, manufactured by coating nanoscale aluminum oxide layers onto polyolefin (PP/PE) substrates. These separators integrate high safety and superior performance.

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ADVANTAGES

Core Advantages

1. High-Temperature Resistance

- The alumina coating withstands temperatures exceeding 180°C, preventing dimensional shrinkage or melting of the separator under high heat, thus enhancing battery thermal stability.

2. Superior Safety

- Neutralizes corrosive hydrofluoric acid (HF) in electrolytes, reducing electrode degradation;

- Maintains the "closed-pore" feature of polyolefin separators to suppress short-circuit risks during thermal runaway.

3. Performance Optimization

- High-Rate Charging/Discharging: Nano-Al₂O₃ forms solid solutions, minimizing ionic conduction resistance and enabling fast-charging capabilities;

- Enhanced Wettability: The coating exhibits liquid absorption rates over twice those of conventional separators, with strong electrolyte retention to improve cycle life;

- Low Self-Discharge: Increased micro-pore tortuosity reduces electrolyte permeation, lowering self-discharge rates by approximately 30%.

USE

Applications

1. Power Batteries (EVs/Energy Storage):

- Suitable for high-energy-density battery packs, capable of withstanding frequent fast-charging and high-temperature conditions (e.g., 800V high-voltage platform vehicles).

2. Consumer Electronics (Smartphones/Laptops):

- Enables lightweight battery designs while enhancing safety (e.g., flexible batteries for foldable smartphones).

3. Specialty Batteries:

- Used in aerospace, military equipment, and other scenarios requiring extreme reliability.

SPECIFICATIONS

Technical Trends

- Hybrid Materials: Integration with silica (SiO₂), boehmite (AlOOH), and other materials to further enhance mechanical strength and thermal stability.

- Ultra-Thinning: Development of sub-5μm coatings to reduce battery internal resistance, catering to new form factors like 4680 large-format cylindrical cells.

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