Applications and advantages of Boehmite
What is Boehmite
Boehmite (γ-AlOOH) is the main component of bauxite, an important chemical raw material with unique crystal structure, widely used in many fields such as catalysts and carriers, paper fillers, inorganic flame retardants, etc. Especially it has a broad application prospect as a precursor to prepare alumina trioxide which is widely used in ceramics, electronics, adsorption and catalysis. Currently, the preparation of inorganic nanomaterials with specific morphologies has become a hot topic of research in the field of materials science. In particular, low-dimensional nanomaterials have received increasing attention due to their special physicochemical properties and broad application value.
Application of boehmite in lithium battery separators
Boehmite coating can significantly improve the thermal stability of the diaphragm, enhance the safety of lithium batteries, improve the multiplier performance and cycle performance of the battery, while the thinner coating thickness helps to improve the volume energy density and weight energy density of lithium-ion batteries. Alumina's are more widely used in diaphragms. However, it is worth noting that alumina is harder and therefore more abrasive to machinery during the cutting and coating process, which is costly compared to boehmite. boehmite, on the other hand, has characteristics such as high heat resistance and good compatibility with organic materials, and its low hardness reduces wear and tear on machinery, giving it an advantage in terms of cost.
Advantages of boehmite in lithium battery separators
Advantage 1: Li-ion battery diaphragm made of PP/PE material is through-hole, when the current is too high, it is easy to cause perforation phenomenon, which will cause the Li-ion battery to burn or explode, and using high purity alumina or boehmite as coating material together with adhesive coated on the surface of PP/PE material can play the role of hole adjustment, because high purity alumina and boehmite are plate like When the current is too high, the material heats up, and the plate crystal structure of high-purity alumina or bombyte coating material will expand in volume, which will close the current conduction hole on the lithium battery diaphragm, thus playing the role of blocking the current. The special physical and chemical properties of the material can greatly improve the safety performance of lithium batteries, thus providing the possibility of high power lithium batteries with high energy amperage and safe and reliable charging and discharging.
Advantage 2: The high purity alumina or bomite material also has very good thermal conductivity, so that when the battery temperature is too high, this material can conduct heat very well, thus solving the problem of poor thermal conductivity of PP/PE material.
Advantage 3: High purity alumina or boehmite materials also have excellent flame retardancy, because high purity alumina or boehmite materials themselves are very good flame retardants, even if the temperature is too high and reaches the zero combustion point, the good flame retardant properties of the material will prevent widespread combustion or even explosion.
