Aluminum Oxide Used for lithium battery Diaphragm

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What is a ceramic diaphragm. A special ceramic coating diaphragm uses PP,PE or multi-layer composite as the matrix. The surface of the diaphragm is then coated with a nano-sized layer made from aluminum oxide. This is closely adhered to the substrate by special processes. The high temperature safety and reliability of lithium-ion cells can be significantly improved by using this coating. A ceramic-coated special diaphragm can be used for power batteries.

Specifications for diaphragms to charge lithium-ion batteries with lithium-ion:

The diaphragm’s performance determines the interface structure and internal resistance of the battery. This determines its capacity, safety performance, charge density, and performance during a cycle.

These characteristics must be fulfilled:

Chemical stability is excellent: Resistance to organic solvents.

Excellent mechanical properties, high tensile strengths and high puncture resistance.

Excellent thermal stability. Low thermal shrinkage. High film breaking temperature.

The electrolyte’s wettability is good for compatibility and low liquid absorption.

aluminium oxide, a type of inorganic material, is good for ceramic coatings on battery diaphragms.

Ceramic diaphragm for Alumina:

1. Particle size is consistent, so they can be glued well to the diaphragm.

2. Alumina’s purity is high and it can be used without introducing impurities that could affect the internal environment of the batteries.

3. It is necessary for alumina crystal to be compatible with an electrolyte.

Benefits of coating aluminum diaphragms:

Resilience to extreme temperatures

It is resistant to extreme high temperatures, and retains its original shape above 180 degrees Celsius.


An alumina-coated battery can reduce the amount of HF present in the electrolyte. It also improves the safety and acid resistance.

High magnification

A solid solution of nano-alumina is possible in lithium battery. This can enhance the cycle efficiency and magnification.

Good wettability:

The nanometer-sized alumina powder is very liquid absorbent and retains liquid well.

Unique self-turn-off characteristics:

Polyolefin diaphragm’s closed-cell design is kept in place to prevent thermal runaway.

Low self-discharge rate:

Because of its curvature, micropores will be more curvy with alumina coating. The self-discharge rate is also lower than the one for the standard diaphragm.

Increase the lifespan of the cycles by increasing the number of cycle lives.

Aluminum oxide Price

Price is affected by many things, such as the demand and supply in the market and industry trends. Economic activity. Unexpected events.

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