Top 5 lithium ion battery separator manufacturers in the world
The separator is one of the most important components in a lithium-ion battery. Located between the anode and cathode of the battery, it prevents physical contact between the electrodes, while the separator facilitates the transfer of ions in the battery. It can affect key properties such as capacity, cycle performance, and charge-discharge current density of lithium batteries.
Depending on the application, the ideal diaphragm should include the following properties: High electrolyte uptake, as thin as possible without adding dead volume, chemical and electrochemical stability, suitable uniform porosity level, wettability, suitable impedance, optimal cycle life.
Balancing all of the above characteristics to create a technology that is not only safe, efficient but also cost-effective is a huge challenge for lithium ion battery separator manufacturers. Before we listed the top 5 battery separator companies in China, and the following are the top 10 lithium ion battery separator manufacturers in the world(Ranking in no particular order), and the related technology introduction of these lithium ion battery separator manufacturers:
Top 5 lithium ion battery separator manufacturers
Asahi Kasei
Company profile:
Founded in Japan in 1931, Asahi Kasei Corporation is one of Japan’s leading industrial companies and a global leader in various markets. Chemicals, fibers, electronics, etc. are the company’s main business scope.
The HIPORE™ lithium-ion battery separator developed by Asahi Kasei is made of a microporous polyolefin sheet. Not only does it not emit harmful gases during incineration, but it also prevents the anode and cathode from contacting each other and causing a short circuit, making it suitable for use in smartphones.
At the same time, Celgard™ lithium-ion battery separator is used as a separator for various lithium-ion batteries, and its single-layer polypropylene (PP) properties make it suitable for use in hybrid and electric vehicles. Particularly characteristic separators make Asahi Kasei one of the top five lithium ion separator manufacturers.
Asahi Kasei also announced this year that it will increase its production capacity of lithium-ion battery separators, investing 30 billion yen to build a new factory in Miyazaki Prefecture, with a planned annual production capacity of 350 million square meters to meet market demand.
Total market value: 13,500 million yen
Company website: https://www.asahi-kasei.com/
Celgard
Company profile:
Celgard was established in the United States in 1981. The production of polyethylene and polypropylene microporous membranes used in the central part of lithium-ion batteries is the company’s main business. Its products will be primarily used in a wide range of energy storage and other barrier-type applications, such as lithium-ion batteries, lithium primary batteries and select specialty batteries.
At the same time, Celgard’s dry separator process makes the produced products have a high degree of chemical and thermal stability, which is very suitable for various battery types. Excellent cycling and trickle charge performance are guaranteed, internal short circuits are reduced, and product integrity is improved.
One of Celgard’s solutions for battery electric vehicle applications includes the company’s proprietary triple-layer separator (PP/PE/PP) technology using a polypropylene/polyethylene/polypropylene (PP/PE/PP) three-layer structure. The polypropylene outer layer not only provides high temperature melt integrity (HTMI), a critical property for safety, but also provides oxidation resistance. Polyethylene inner layer can be quickly closed during thermal runaway.
Celgard H1809 consists of an 18-micron triple-layer microporous membrane (PP/PE/PP) with a porosity of 49%. The H1809 is designed for use in high energy lithium battery systems; especially those devices that require special safety and energy density advantages. Recently, Celgard as one of the top 5 lithium ion battery separator manufacturers has signed a strategic alliance agreement with American Battery Factory (ABF) to jointly carry out a joint research project, planning to supply 100% of the separator demand for high-tech prismatic lithium iron phosphate (LFP) batteries.
Registered capital: 200 million dollars
Company website: https://www.celgard.com/
UBE
Company profile:
UBE is one of the lithium ion battery separator manufacturers in the world was established in Tokyo in 1942, and its business scope covers mining, medical, building materials, machinery manufacturing, electric power and other fields, while chemicals and machinery are the company’s main business. UBE’s products include advanced materials such as polyimide, electrolytes and separators for lithium-ion batteries, and fine chemicals being developed for environmentally friendly applications.
The diaphragms produced by UBE are mainly dry uniaxially stretched diaphragms. The diaphragms produced by the dry single drawing process have uniform micropore distribution, high mechanical strength and good thermal stability. Among them, UBE’s CPORE is a high-performance separator coating, which is made by using advanced dispersion technology and high-speed and precise coating technology on the surface of the separator. CPORE thicknesses range from 13 to 25 microns.
Inorganic particles are used in these separators to further improve their heat resistance, minimize shrinkage caused by abnormal heating, and prevent short circuits inside the battery, significantly improving the safety of lithium-ion batteries.
Total market value: 206.772 billion yen
Company website: https://www.ube.com
Entek
Company profile:
Founded in the US in 1984, Entek is the only lithium ion battery separator manufacturers in the world producing all three major separator technologies (PE, AGM and Lithium separators). It is also the world’s leading designer and manufacturer of high-reliability microporous polyethylene battery separators for lead-acid and lithium-ion batteries. Battery separators, extruders, and engineering services are the main business areas of Entek.
Entek offers coated and uncoated separators based on Ultra High Molecular Weight Polyethylene (UHMWPE). One of the products, EPH, targets high discharge/charge rate applications in portable electronic devices, such as cordless power tools, lawn and garden equipment, high-power remote-controlled cars, and more.
The thickness of the EPH separator ranges from 9 to 16 microns and the porosity is 48%. Capable of targeting high discharge/charge rate applications in portable electronic devices.
Company website: https://entek.com/
Soteria
Company profile:
Soteria company is mainly around the design of safe batteries, mainly around the components inside the battery to significantly improve safety. Soteria’s technology enables batteries to restore function after damage, reduce the risk of recalls, and increase design freedom and energy density.
Unlike other in top 5 lithium ion battery separator manufacturers in the world, Soteria’s patented technology purportedly eliminates the root cause of thermal runaway, isolates short circuits, and allows batteries to continue to function after damage. Soteria’s non-woven membranes are reinforced with aramid fibers, creating a membrane that won’t melt or shrink in the presence of defects or damage.
In addition, the metallized film current collector blows like a fuse, isolating the short circuit and allowing the battery to continue to operate after damage.
Company website: https://soteriabig.com/
If you want to know more about related battery separator companies, you can refer to top 5 wet process separator companies in China and top 5 dry process separator companies.
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