US 12,015,155 B2
Compositions for forming a porous insulating layer, electrode for non-aqueous electrolyte rechargeable battery, rechargeable battery including the electrode and method of manufacturing the electrode
Tomoyuki Fukatani, Yokohama (JP); and Koji Hoshiba, Yokohama (JP)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by Samsung SDI Co., Ltd., Yongin-si (KR)
Filed on Jan. 31, 2020, as Appl. No. 16/779,193.
Claims priority of application No. 2019-017059 (JP), filed on Feb. 1, 2019; and application No. 10-2019-0085265 (KR), filed on Jul. 15, 2019.
Prior Publication US 2020/0251739 A1, Aug. 6, 2020
Int. Cl. H01M 4/62 (2006.01); H01M 4/13 (2010.01); H01M 10/0525 (2010.01); H01M 10/0569 (2010.01)
CPC H01M 4/622 (2013.01) [H01M 4/13 (2013.01); H01M 10/0525 (2013.01); H01M 10/0569 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A composition to form a porous insulating layer on an active material layer on a main surface of a current collector,
wherein the active material layer comprises an active material to electrochemically intercalate and deintercalate lithium ions and an active material layer binder,
the composition to form the porous insulating layer comprises a solvent, an insulating inorganic particle, and a porous insulating layer binder, the solvent comprising an organic solvent, and
the porous insulating layer binder is a polymer obtained by polymerization of monomers selected from the group consisting of about 30 wt % to about 60 wt % of an aromatic vinyl compound, about 20 wt % to about 69 wt % of (meth)acrylic acid ester, about 5 wt % to about 35 wt % of (meth)acrylic acid ester comprising a hydroxy group or an ether group, and about 1 wt % to about 10 wt % of a vinyl compound comprising an acidic functional group, based on a total weight of the porous insulating layer binder,
wherein a distance between Hansen solubility parameters of the active material layer binder and the organic solvent is greater than or equal to about 8.0 MPa1/2.