The so-called polymer lithium battery refers to a lithium-ion battery that uses a polymer as an electrolyte, and is divided into two types: “semi-polymer” and “all-polymer”.

“Semi-polymer” refers to coating a layer of polymer (usually PVDF) on the barrier film to make the cell’s adhesion stronger, the battery can be made harder, and the electrolyte is still a liquid electrolyte. The “all polymer” refers to the use of polymer to form a gel network inside the cell, and then inject the electrolyte to form an electrolyte. Although “all-polymer” batteries still use liquid electrolyte, the amount is much smaller, which greatly improves the safety performance of lithium-ion batteries. As far as I know, only SONY is currently mass producing “all-polymer” lithium-ion batteries.

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