Aluminum Oxide Used for lithium battery Diaphragm

According to statistics from China Chemical and Physical Power Supply Industry Association， China's export volume and export value of lithium-ion batteries have continued to increase. In 2021, China's exports of lithium-ion batteries were 3.428 billion, with a year-on-year growth of 54.34%. The export of lithium-ion batteries was 28.428 billion DOLLARS, up 78.34% year on year. 

From the battery export destination, so far. China's lithium-ion batteries are mainly exported to the Asia Pacific and the United States and other places. In terms of price, the price of aluminum oxide, led by lithium-ion batteries, is expected to expand globally. 

What is ceramic diaphragm?
Ceramic coating special diaphragm: With PP, PE or multi-layer composite diaphragm as the matrix, the surface is coated with a layer of nano-sized aluminum oxide material, which is closely bonded to the substrate after special process treatment. It can significantly improve the high temperature resistance and safety of lithium-ion batteries. Ceramic coated special diaphragm is especially suitable for power batteries.

Requirements for diaphragms for lithium-ion batteries:
The performance of the diaphragm determines the internal resistance and interface structure of the battery, and then determines the battery capacity, safety performance, charge and discharge density and cycle performance.
 
Therefore, the following characteristics need to be met:
Good chemical stability: resistance to organic solvents.
Good mechanical properties: high tensile strength and high puncture strength.
Good thermal stability: low thermal shrinkage and high film breaking temperature.
Electrolyte wettability: good compatibility with electrolyte and high liquid absorption rate.
 
As a kind of inorganic substance, aluminum oxide has high thermal stability and chemical inertia, so it is a good choice for battery diaphragm ceramic coating.
 
Performance requirements of ceramic diaphragm for alumina:
1. The particle size is uniform, which can be well glued to the diaphragm without blocking the diaphragm aperture.
2. Alumina has high purity and can not introduce impurities, which affects the internal environment of the battery.
3. The requirement of crystal structure of alumina ensures the compatibility and wettability of alumina to electrolyte.
 
Advantages of coating alumina diaphragm:
High temperature resistance:
Alumina coating has excellent high temperature resistance and can maintain the intact shape of the diaphragm above 180 degrees Celsius.
 
High security:
The alumina coating can neutralize the free HF in the electrolyte and improve the acid resistance and safety of the battery.
 
High magnification:
Nano-alumina can form solid solution in lithium battery, which can improve the magnification and cycle performance.
 
Good wettability:
Nanometer alumina powder has good liquid absorption and liquid retention ability.
 
Unique self-turn-off characteristics:
The closed-cell characteristic of polyolefin diaphragm is maintained to avoid safety risks caused by thermal runaway.
 
Low self-discharge rate:
The alumina coating increases the curvature of micropores and the self-discharge is lower than that of the common diaphragm.
 
Long cycle life: reduce the mechanical micro-short circuit in the cycle process and effectively improve the cycle life.
 
Aluminum oxide Price
The price is influenced by many factors including the supply and demand in the market, industry trends, economic activity, market sentiment, and unexpected events.
If you are looking for the latest al2o3 price, you can send us your inquiry for a quote. (sales3@nanotrun.com)
 
Aluminum oxide Supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted al2o3 manufacturer and al2o3 supplier with over 12-year-experience. We ship our goods all over the world.
 
If you are looking for high-quality al2o3 powder, please feel free to contact us and send an inquiry. (sales3@nanotrun.com)
 

Bola Carbon, the global black carbon giant, recently announced that it is raising the price of all black carbon aluminum oxide.

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