The separator is one of the four key materials of the lithium battery. Its main function is to separate the positive and negative electrodes of the lithium-ion battery. Only the electrolyte ions are passed to prevent the two electrodes from contacting and short-circuiting. Its performance determines the battery's interface structure and internal resistance. Etc., directly affect the battery capacity, cycle life and safety and stability.
Lithium battery separator is a kind of high value-added material with high technology barrier, which accounts for about 20-30% of the cost of lithium battery. In recent years, driven by market demand for new energy vehicles and 3C products, the market demand for lithium battery separators has grown rapidly.
Market size forecast
According to Seri Research statistics, the total global demand for separators in 2018 was 2.787 billion square meters, of which the demand for power batteries was 1.276 billion square meters. It is expected that the global demand for power battery separators will exceed 2.88 billion square meters in 2020, and the proportion will be the total demand. 60.89%.