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US 11,699,791 B2Granted
Binder for secondary battery and secondary battery including the same
AssigneeSK On Co., Ltd.
InventorsJoon Sup Kim, Sun Young Kim, Dong Gun Lee, Jee Hee Lee
Life of this patent
Estimating the term…
Abstract
A binder for a secondary battery includes a copolymer having a first repeating unit, a second repeating unit, and a third repeating unit. A ratio of a number of the first repeating unit (A) and a sum of a number of the second repeating unit and a number of the third repeating unit (B) is 90:10 to 52:48. A ratio of the number of the second repeating unit and the number of the third repeating unit is 67:33 to 1:99. A weight average molecular weight of the copolymer is 225,000 to 2,000,000.
Claims10
A binder for a secondary battery, comprising:
- a copolymer having a first repeating unit represented by Chemical Formula 1 below, a second repeating unit represented by Chemical Formula 2 below, and a third repeating unit represented by Chemical Formula 3 below,
- wherein a ratio of a number of the first repeating unit (A) and a sum of a number of the second repeating unit and a number of the third repeating unit (B) is 90:10 to 52:48,
- a ratio of the number of the second repeating unit and the number of the third repeating unit is 67:33 to 1:99, and
- a weight average molecular weight of the copolymer is 225 kDa to 2,000 kDa;
- wherein, in Chemical Formula 2, R1 is hydrogen or an alkyl group having 1 to 5 carbon atoms;
- wherein, in Chemical Formula 3, R2 is hydrogen or an alkyl group having 1 to 5 carbon atoms,
- Mn+ is Li+, Na+, NH4+, Ca2+, Mg2+, Al3+ or Ga3+, and
- n is an integer of 1 to 3.
5 more elements
Dependencies are inferred from the claim text.