Polymer electrolyte for secondary battery and lithium secondary battery comprising the same
AssigneeLG Chem, Ltd.
InventorsSol Ji Park, Kyoung Ho Ahn, Young Jea Kim, Yong Jin Jang, Joong Jin Han, Chul Haeng Lee
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Abstract
The present invention relates to a polymer electrolyte for a secondary battery and a lithium secondary battery comprising the same, and particularly, to a polymer electrolyte for a secondary battery, in which mechanical properties, ionic conductivity, and electrical conductivity are improved by comprising a polymer and an electron-acceptor having at least one double bond, as a dopant, and a lithium secondary battery in which electrochemical stability at high temperature and high voltage is enhanced by comprising the polymer electrolyte.
Claims15
A polymer electrolyte for a secondary battery, the polymer electrolyte comprising:
- a polymer represented by Formula 1 or Formula 2;
- and
- an electron-acceptor having at least one double bond, as a dopant:
- wherein R and R5 are each independently carbon (C) or sulfur (S),
- R1 is
- wherein R9 is —C(CF3)2—,
- R2 and R7 are
- R3 is —S(CF2)2SO3−Li+,
- R4 is
- wherein R10 is —C(CF3)2—,
- R6 is
- wherein R9 is —C(CF3)2—,
- R8 is
- o and o1 are 1 or 2,
- p, p1, q, q1, r, and s are 0 or 1,
- a ratio of n:m is in a range of 95:5 to 5:95 as a molar ratio, and
- a ratio of n′:m′ is in a range of 95:5 to 5:95 as a molar ratio.
Dependencies are inferred from the claim text.