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US 12,183,950 B2Granted
Separator and electrochemical device comprising same
AssigneeLG Energy Solution, Ltd.
InventorsSo-Mi Jeong, Dong-Wook Sung
Life of this patent
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Abstract
A separator including a porous polymer substrate, and a porous coating layer, and an electrochemical device comprising the same. The porous coating layer includes P(VDF-TrFE-CTFE) and PVDF-CTFE as a binder polymer. The separator has a lower resistance by changing the characteristics of the binder polymer.
Claims10
A separator for an electrochemical device, comprising:
- a porous polymer substrate;
- and
- a porous coating layer on at least one surface of the porous polymer substrate,
- wherein the porous coating layer comprises a binder polymer,
- wherein the binder polymer comprises poly (vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene P (VDF-TrFE-CTFE) and polyvinylidene fluoride-chlorotrifluoroethylene (PVDF-CTFE),
- wherein a β-phase amount of the P (VDF-TrFE-CTFE) is 0.90 or above, and
- wherein a weight ratio of the P (VDF-TrFE-CTFE) to the PVDF-CTFE is 35:65 to 87:13.
4 more elements
Dependencies are inferred from the claim text.