What are the advantages of Boomstone? Application of Boehmite in lithium battery diaphragm
Application of Boehmite in lithium battery diaphragm
Under the premise of low coating thickness, boomstone coating can significantly improve the thermal stability of the membrane, enhance the safety of lithium battery, improve the multiplier performance and cycling performance of the battery, and at the same time, the thinner coating thickness is helpful to improve the volume energy density and weight energy density of lithium ion battery. Alumina is more widely used in diaphragms. However, it is worth noting that the hardness of alumina is relatively high, so in the cutting and coating process, the wear of machinery is large, and the cost is higher than that of boehme. And boomercium stone has high heat temperature, good compatibility with organic matter and other characteristics, low hardness can reduce the wear of machinery, the cost has an advantage.
Advantages of Boehmite in lithium battery diaphragm
Advantage 1: too much current, can block the current. PP/PE material of lithium battery diaphragm is hole, when the current is too large, it is easy to cause perforation phenomenon, resulting in lithium batteries or explosion, burning with high purity alumina or boehmite as a coating material used with adhesive coated in PP/PE material surface can have the effect of the hole, this is due to the high purity alumina and boehmite as tabular crystal structure, when the current is too large, material heating, and tabular crystal structure of high purity alumina or boehmite coating material can volume expansion, will be closed on lithium battery diaphragm current conduction hole, which have the effect of blocking currents, when the temperature is lowered, The volume of the material will shrink, and then the current conduction hole on the diaphragm will reopen. The special physical and chemical properties of the material can greatly improve the safety performance of lithium battery, thus providing the possibility for high-power lithium battery with high energy safety and safe and reliable charging and discharging.
Advantage two: high purity alumina or boehmite material also has very good thermal conductivity, the battery temperature is too high, this material can be very good heat conduction, so as to solve the poor thermal conductivity of PP/PE material.
Advantage three: high purity alumina or boehmite material also has excellent flame retardation, this is because the high purity alumina or boehmite material itself is a very good flame retardant, even because the temperature is too high to reach zero point of combustion, the material's good flame retardation performance will prevent a large range of combustion or even explosion.
