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 diaphragm as the base. The surface of the diaphragm is then coated with a nano-sized layer made from aluminum oxide. This material is tightly bound 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.

Requirements to diaphragms of 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 puncture strength.
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° Celsius.

An alumina-coated battery can reduce the free HF and enhance safety.

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 diaphragms have a closed-cell design to prevent thermal runaway.

Low self-discharge rate:
Because of its curvature, micropores are more curvy with alumina than the standard diaphragm. The self-discharge rate is also lower than the one caused by the common diaphragm.

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

Aluminum oxide Price
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