Method for manufacturing polymer solid electrolyte
AssigneeLG Energy Solution, Ltd.
InventorsSunghyun Nam, Hyeaeun Han, Dong Kyu Kim
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Abstract
A method for preparing a polymer solid electrolyte, and the polymer solid electrolyte prepared by freezing and thawing includes a cross-linked structure formed by a cross-linkable functional group, and the cross-linked structure includes (a) a cross-linkage between the cross-linkable functional groups, (b) a cross-linkage between the cross-linkable functional group and a solvent, and (c) a bond between the cross-linkable functional group and a lithium salt. Accordingly, even without using a separate plasticizer, crystallinity of the polymer solid electrolyte is reduced, and ionic conductivity can be improved. In addition, continuous processing and mass production are possible.
Claims16
A method for preparing a polymer solid electrolyte, comprising:
- (1) preparing a solution for forming a polymer solid electrolyte including a polymer solution containing a cross-linkable functional group, and a lithium salt;
- (2) unwinding a substrate film using an unwinder and supplying the substrate film to a transfer path;
- (3) forming a coating film by applying the solution for forming a polymer solid electrolyte on the substrate film;
- (4) freezing the coating film by transferring the coating film-formed substrate film to a freezing section;
- (5) preparing a polymer solid electrolyte layer by transferring the frozen coating film-formed substrate film to a thawing section to thaw the frozen coating film;
- and
- (6) winding the substrate film including the polymer solid electrolyte layer using a rewinder for recovery.
Dependencies are inferred from the claim text.