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US 11,581,614 B2Granted
Separator including coating layer with polymer having main chain with non-covalent electron pair and aromatic side chain and lithium-sulfur battery having the same
AssigneeLG Energy Solution, Ltd.
InventorsKihyun Kim, Kwonnam Sohn, Dongseok Shin, Doo Kyung Yang
Life of this patent
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Abstract
A separator for a lithium-sulfur battery and a lithium-sulfur battery including the same are provided. More particularly, a separator for a lithium-sulfur battery including a porous substrate; and a coating layer present on at least one surface of the porous substrate, wherein the coating layer includes a polymer including a main chain, with a functional group having a non-covalent electron pair present in the main chain and a side chain with an aromatic hydrocarbon group present in the side chain.
Claims11
A separator for a lithium-sulfur battery comprising:
- a porous substrate;
- and
- a coating layer present on at least one surface of the porous substrate,
- wherein the coating layer comprises a polymer comprising (a) a main chain, wherein a functional group comprising a non-covalent electron pair is present in the main chain and (b) a side chain, wherein an aromatic hydrocarbon group is present in the side chain,
- wherein the aromatic hydrocarbon group is at least one selected from the group consisting of a naphthyl group, a fluorenyl group, an anthracenyl group, and a perylenyl group, and
- wherein the functional group comprising the non-covalent electron pair comprises at least one selected from the group consisting of an amine group, an ether group, an ester group, a carbonate group, a carbonyl group, and an imide group.
3 more elements
A composition for coating a separator for a lithium-sulfur battery comprising:
- a polymer represented by the following Chemical Formula 1:
- wherein R1 to R6 are the same as or different from each other, and are each independently selected from the group consisting of hydrogen;
- a substituted or unsubstituted C1-C20 alkyl group;
- (R14R15)amino(C2-C10) alkyl group;
- a substituted or unsubstituted C3-C20 cycloalkyl group;
- a substituted or unsubstituted C6-C20 aryl group;
- and a substituted or unsubstituted C4-C20 heteroaryl group;
- or R1 and R2, R3 and R4 and R5 and R6, together with an imide bond including nitrogen, each independently form a 5 to 50-membered ring including a substituted or unsubstituted C6-C20 aryl group or a substituted or unsubstituted C4-C20 heteroaryl group;
- R14 and R15 are the same as or different from each other, and are each independently selected from the group consisting of hydrogen;
- a substituted or unsubstituted C1-C20 alkyl group;
- a substituted or unsubstituted C3-C20 cycloalkyl group;
- a substituted or unsubstituted C6-C20 aryl group;
- and a substituted or unsubstituted C4-C20 heteroaryl group;
- or R14 and R15 together with an imide bond including nitrogen, form a 5 to 50-membered ring including a substituted or unsubstituted C6-C20 aryl group or a substituted or unsubstituted C4-C20 heteroaryl group;
- R1 and R2, R3 and R4, R5 and R6 and R14 and R15 are bonded to each other to form an aliphatic or aromatic ring including a heteroatom;
- at least one of R1 to R6 comprises an aromatic ring, or is connected to another substituent of adjacent R1 to R6 through an aromatic ring;
- R7 to R13 are the same as or different from each other, and are each independently selected from the group consisting of hydrogen, oxygen, and a substituted or unsubstituted C1-C10 alkyl group, and when R7 to R13 are oxygen, the oxygen forms a double bond with the bonded carbon atom;
- wherein the substituted groups are substituted with one or more substituents selected from the group consisting of alkyl, alkenyl, alkynyl, heterocyclic, aryl, heteroaryl, acyl, oxo, imino, thiooxo, cyano, isocyano, amino, azido, nitro, hydroxyl, thiol, and halo;
- m is each independently an integer of 0 to 5;
- and
- n is an integer from 5 to 5,000.
18 more elements
Dependencies are inferred from the claim text.