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Suppliers growing upstream lithium battery segment

An expanding application base is encouraging companies to boost septum production.

China makers of septums are stepping up R&D and manufacture to broaden their selections and cater to different markets. Entry-level and midrange units currently constitute suppliers’ catalogs.

Only a few enterprises make up the line. These include large operations Shenzhen Senior Technology Material Co. Ltd, Xinxiang Qreen and Foshan Jinhui. The last has annual capacity surpassing 12 million sqm. By output, the three suppliers account for more than 80 percent of the country’s total. The technology, however, remains in the control of international major players.

The product is a key material in the production of lithium batteries, accounting for 20 to 30 percent of total costs. This is because its performance is a determining factor of the latter’s capacity, cycle life and safety.



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