Electrolyte for lithium-sulfur battery and lithium-sulfur battery comprising same
AssigneeLG Chem, Ltd.
InventorsIntae PARK, Sungwon HONG, Charles Kiseok SONG, Youhwa OHK, Doo Kyung YANG, Changhoon LEE
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Abstract
The present invention relates to a ternary liquid electrolyte for a lithium-sulfur battery and a lithium-sulfur battery including the same. The liquid electrolyte for a lithium-sulfur battery according to the present invention exhibits an excellent sulfur utilization rate when used in a lithium-sulfur battery, and exhibits excellent stability. Accordingly, the liquid electrolyte for a lithium-sulfur battery according to the present invention is capable of enhancing a life time property while securing a capacity property of a lithium-sulfur battery.
Claims14
A liquid electrolyte for a lithium-sulfur battery comprising:
- a lithium salt;
- and
- a non-aqueous solvent,
- wherein the non-aqueous solvent includes
- i) cyclic ether including one oxygen in a ring structure;
- ii) glycol ether represented by the following Chemical Formula 1;
- and
- iii) linear ether represented by the following Chemical Formula 2:
- R1—O—(CH2CH2O)x—R2 [Chemical Formula 1]
- R3—O—(CH2CH2O)y—R4 [Chemical Formula 2]
- in Chemical Formulae 1 and 2,
- R1 to R4 are the same as or different from each other, and each independently a C1 to C6 alkyl group, a C6 to C12 aryl group, or a C7 to C13 arylalkyl group;
- x is an integer of 1 to 4;
- y is an integer of 0 to 4;
- and
- the ether of Chemical Formula 1 is different from the ether of Chemical Formula 2.
Dependencies are inferred from the claim text.