Separator for lithium secondary battery and method for manufacturing same
AssigneeIucf-Hyu (Industry-University Cooperation Foundation Hanyang University)
InventorsYoung Moo Lee, So Young Lee, Na Rae Kang, Jung Hoon Kim, Nurasyikin Misdan, Yang-Kook Sun, Hun-Gi Jung
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Abstract
Provided is a separator for a rechargeable lithium battery including a porous support including a polymer derived from polyamic acid or a polymer derived from polyimide, wherein the polyamic acid and the polyimide include a repeating unit prepared from aromatic diamine including at least one ortho-positioned functional group relative to an amine group and dianhydride.
Claims10
A composition for forming a separator for a rechargeable lithium battery, comprising:
- polyamic acid or polyimide including a repeating unit prepared from aromatic diamine including at least one ortho-positioned functional group relative to an amine group and dianhydride;
- and
- an organic solvent,
- wherein the organic solvent is selected from the group consisting of dimethylsulfoxide;
- N-methyl-2-pyrrolidone;
- N-methylpyrrolidone;
- N,N-dimethyl formamide;
- N,N-dimethyl acetamide;
- a ketone selected from the group consisting of γ-butyrolactone, cyclohexanone, 3-hexanone, 3-heptanone and 3-octanone;
- and a combination thereof.
A composition for forming a separator for a rechargeable lithium battery, comprising:
- 1 wt % to 40 wt % of polyamic acid or polyimide including a repeating unit prepared from aromatic diamine including at least one ortho-positioned functional group relative to an amine group and dianhydride;
- 10 wt % to 95 wt % of an organic solvent;
- and 4 wt % to 70 wt % of the auxiliary agent based on the total amount of the composition,
- wherein the organic solvent is selected from the group consisting of dimethylsulfoxide;
- N-methyl-2-pyrrolidone;
- N-methylpyrrolidone;
- N,N-dimethyl formamide;
- N,N-dimethyl acetamide;
- a ketone selected from the group consisting of γ-butyrolactone, cyclohexanone, 3-hexanone, 3-heptanone and 3-octanone;
- and a combination thereof,
- wherein the separator includes a porous support including a plurality of a fiber consisting of a polymer derived from the polyamic acid or a polymer derived from the polyimide, the porous support comprises picopore present in the polymer derived from the polyamic acid or a picopore present in the polymer derived from the polyimide, and the fiber is arranged randomly.
Dependencies are inferred from the claim text.