Back to results
US 11,901,578 B2Granted
Separator comprising porous adhesive layer, and lithium secondary battery using same
AssigneeSamsung SDI Co., Ltd.
InventorsSeyeong Kang, Gain Kim, Byung-Soo Kim, Yongkyoung Kim
Life of this patent
Estimating the term…
Abstract
The present invention relates to a separator, a manufacturing method therefor, and a lithium secondary battery comprising the same, the separator comprising: a porous substrate; and a porous adhesive layer formed on one surface or both surfaces of the porous substrate, wherein the porous adhesive layer comprises a nitrogen-containing binder and polyvinylidene fluoride-based polymer microparticles having an average diameter of 200 nm to 700 nm, and the total thickness of the porous adhesive layer is 1 μm or less.
Claims6
A separator comprising
- a porous substrate;
- and a porous adhesive layer formed on a first side surface of the porous substrate and/or a second side surface of the porous substrate facing away from the first side surface,
- wherein the porous adhesive layer comprises polyvinylidene fluoride-based polymer microparticles having an average diameter of 200 nm to 700 nm, a nitrogen-containing binder, and inorganic particles, and the total thickness of the porous adhesive layer is 1 μm or less,
- wherein the nitrogen-containing binder is polyethyleneimine having a weight average molecular weight of 50,000 to 100,000 g/mol, and
- wherein the inorganic particles are included in an amount of 10 to 20 wt % based on a total solid weight of the porous adhesive layer.
2 more elements
Dependencies are inferred from the claim text.