Aluminum Oxide Used for lithium battery Diaphragm

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What is a ceramic diaphragm. A layer of nano-sized aluminum dioxide material is applied to the substrate. This is done after special processing. 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.

How to use diaphragms with lithium-ion batteries

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

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 battery’s internal environment.

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 electrolyte’s free HF and increase the safety and acid resistance.

High magnification

A solid solution of nano-alumina is possible in lithium batteries, which will improve magnification and cycling performance.

Good wettability:

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

Unique self-turn-off characteristics:

Polyolefin diaphragm maintains its closed-cell design to prevent thermal runaway from posing safety hazards.

Low self-discharge rate:

Because of its curvature, micropores are more defined than with alumina. 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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