Teijin Develops and Commercializes Innovative Separators for Growing Lithium Ion Secondary Battery Market
Teijin will now offer two types of innovative separators under the Lielsort brand, including a highly heat-resistant separator the company developed in 2007. The product is coated with Teijinconex meta-aramid and achieves unprecedented capacity and energy density as well as enhanced safety and lifespan for liquid-electrolyte cylindrical LIBs used in products including PCs and vehicles.
Lielsort, in addition to improving output by about 20% compared to conventional LIBs, also can be combined with a high-potential positive electrode to extend the battery's lifespan by several times longer than batteries with existing separators. High-power, high-capacity, high-energy-density LIBs have potential for numerous applications, including tablets and vehicles, the two main uses that are propelling the current LIB separator market. Teijin's sales target for its innovative separator business is 20 billion yen by the year 2020.
Teijin has used its expertise in polymeric chemistry to develop the world's first technology for simultaneously coating both sides of the separator. It also developed a high-speed coating technology that is five times faster than conventional coating. Both technologies enable more efficient production.
To support full-scale commercialization, Teijin has established a separator manufacturing company in Asan, South Korea called Teijin CNF Korea Co., Ltd. The company, a joint venture with CNF, a major film processor, will begin production in June. Teijin also established a wholly owned subsidiary called Teijin Electronics Korea Co., Ltd. to sell both separators. The Seoul-based company began operating in January. This production and sales network, which has close connections to South Korean companies, the world leaders in LIB production, also will provide Teijin with a secure foothold for penetrating the Chinese market.
Teijin's innovative Lielsort separators, which have already been approved by leading battery manufacturers, are now ready for initial shipments. Going forward, Teijin will accelerate production and work to establish Lielsort as the de facto standard for next-generation LIB specifications.
About the Teijin Group
Teijin is a global technology-driven group operating in eight main fields: aramid fibers, carbon fibers & composites, polyester fibers, plastics, films, medical & pharmaceuticals, fiber products marketing and IT businesses. Teijin Limited, the holding company for the Teijin Group, is listed on the Tokyo and Osaka stock exchanges. The group, comprising 150 companies and 17,542 employees worldwide, had consolidated sales of JPY 815.7 billion (USD 10.6 billion) and total assets of JPY 761.5 billion (USD 9.9 billion) in the fiscal year ending March 31, 2011.
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