The separator is a key material that directly determines the safety performance of the battery. As the capacity of the lithium-ion battery continues to increase, the energy stored in the interior is getting larger and larger. It may occur that the separator is melted due to excessive temperature and short-circuited. If a layer of ultra-fine ultra-pure alumina is coated on the separator, short circuits between the electrodes can be avoided and the safety of lithium batteries can be improved.
The ultra-fine alumina material for separator coating is an ultra-fine white powder with a size range of 400-500 nm. It has excellent thermal conductivity, insulation, mechanical strength, and thermal stability. It can be used in lithium battery separators. The functions of hole adjustment, heat conduction, high temperature resistance and flame retardancy greatly improve the high temperature resistance and safety performance of lithium batteries.
Market size forecast
According to the research of Serry Research, by 2020, the global market space for lithium battery separators corresponding to alumina and other ceramic powders is 3.6-4.1 billion yuan.