Why does my country’s lithium-ion battery separator technology rely on imports?

　　Why does my country’s lithium-ion battery separator technology rely on imports? Although my country's lithium-ion battery market is booming, our country is not a strong country in lithium-ion battery separators. We are still far behind the world's first-class level. In particular, high-end battery separator materials still rely on imports.

　　Among the four core materials of lithium batteries, the positive and negative electrode materials and electrolyte have been domestically produced, but the separator is still a shortcoming.

　　Why does my country’s lithium-ion battery separator technology rely on imports?

　　my country's lithium-ion battery separators have made major breakthroughs in dry process and now have world-class manufacturing levels. However, in the field of wet separators, domestic separator companies are limited by many factors such as process and technology. The product level is still low, and production equipment mainly relies on imports.

　　There is a big gap between my country's lithium battery separator products and foreign products in terms of thickness, strength, and porosity consistency, and product batch consistency also needs to be improved.

　　As the core material of soft-pack batteries, the production technology of aluminum-plastic film is much more difficult than that of separators, positive electrodes, negative electrodes, and electrolytes. It is one of the three high technologies in the lithium battery industry. From the perspective of product performance, there is a big gap between my country's aluminum-plastic film products and foreign products, which are mainly reflected in:

　　The surface treatment process of aluminum foil is backward and pollutes a lot; the water treatment of aluminum foil will produce "hydrogen embrittlement", resulting in poor disassembly resistance of the aluminum-plastic film; the surface stiffness of the aluminum foil is not enough and the yield rate is poor; it is easy to combine polypropylene with the highly thermally conductive aluminum foil surface. Curling, resulting in lamellar crystals; domestic adhesive formulation technology is poor and prone to delamination and peeling problems.

　　From an industry perspective, the United States has relatively strong R&D and design capabilities and is still leading the original innovation and core material research and development of lithium batteries; Japan, as a major battery material manufacturing country, has strict production specifications and can be the first to manufacture new finished batteries.

　　At present, the best lithium battery separator materials in the world come from two Japanese companies, Asahi Kasei and Toen Chemical, and 90% of the domestic lithium battery aluminum plastic film market is also monopolized by Japanese manufacturers such as Showa Denko.

　　Compared with Japan and South Korea, my country's low-end lithium battery products have more advantages, mainly because labor and raw materials are relatively cheap. However, in some high-end products, especially the core materials and manufacturing processes related to the safety of lithium batteries, there are still A larger gap. The lack of core patents and the inadequacy of key materials such as separators have not only become an unbearable pain for domestic lithium batteries, but also hindered the "going out" of domestic lithium battery companies.

　　Separators for lithium batteries have strict requirements on safety, permeability, porosity and thickness. Compared with Japan, the gap between my country's high-end diaphragms is obvious. The consistency of domestic separator products is not high, and there are problems such as substandard porosity, uneven thickness, pore distribution, and pore size distribution.

　　Domestic lithium batteries are stuck: high-end separators still rely heavily on imports. If the development of lithium batteries is to be independent of others, high-end materials such as separators cannot be avoided!

　　Why does 18650 lithium-ion battery separator technology rely on imports?

　　Why does my country’s 18650 lithium-ion battery separator technology rely on imports? Although my country's 18650 lithium-ion battery market is booming, our country is not a strong country in 18650 lithium-ion battery separators. We are still far behind the world's first-class level. In particular, high-end battery separator materials still rely on imports.

　　Among the four core materials of lithium batteries, the positive and negative electrode materials and electrolyte have been domestically produced, but the separator is still a shortcoming.

　　Why does my country’s 18650 lithium-ion battery separator technology rely on imports?

　　my country's 18650 lithium-ion battery separators have made major breakthroughs in dry process and now have world-class manufacturing levels. However, in the field of wet separators, domestic separator companies are limited by many factors such as process and technology. The product level is still low, and production equipment mainly relies on imports.

　　There is a big gap between my country's lithium battery separator products and foreign products in terms of thickness, strength, and porosity consistency, and product batch consistency also needs to be improved.

　　As the core material of soft-pack batteries, the production technology of aluminum-plastic film is much more difficult than that of separators, positive electrodes, negative electrodes, and electrolytes. It is one of the three high technologies in the lithium battery industry. From the perspective of product performance, there is a big gap between my country's aluminum-plastic film products and foreign products, which are mainly reflected in:

　　The surface treatment process of aluminum foil is backward and pollutes a lot; the water treatment of aluminum foil will produce "hydrogen embrittlement", resulting in poor disassembly resistance of the aluminum-plastic film; the surface stiffness of the aluminum foil is not enough and the yield rate is poor; it is easy to combine polypropylene with the highly thermally conductive aluminum foil surface. Curling, resulting in lamellar crystals; domestic adhesive formulation technology is poor and prone to delamination and peeling problems.

　　From an industry perspective, the United States has relatively strong R&D and design capabilities and is still leading the original innovation and core material research and development of lithium batteries; Japan, as a major battery material manufacturing country, has strict production specifications and can be the first to manufacture new finished batteries.

　　At present, the best lithium battery separator materials in the world come from two Japanese companies, Asahi Kasei and Toen Chemical, and 90% of the domestic lithium battery aluminum plastic film market is also monopolized by Japanese manufacturers such as Showa Denko.

　　Compared with Japan and South Korea, my country's low-end lithium battery products have more advantages, mainly because labor and raw materials are relatively cheap. However, in some high-end products, especially the core materials and manufacturing processes related to the safety of lithium batteries, there are still A larger gap. The lack of core patents and the inadequacy of key materials such as separators have not only become an unbearable pain for domestic lithium batteries, but also hindered the "going out" of domestic lithium battery companies.

　　Separators for lithium batteries have strict requirements on safety, permeability, porosity and thickness. Compared with Japan, the gap between my country's high-end diaphragms is obvious. The consistency of domestic separator products is not high, and there are problems such as substandard porosity, uneven thickness, pore distribution, and pore size distribution.

　　Domestic lithium batteries are stuck: high-end separators still rely heavily on imports. If the development of lithium batteries is to be independent of others, high-end materials such as separators cannot be avoided!

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