Compound, non-aqueous electrolyte solution including the same, and lithium secondary battery
The present invention relates to a compound capable of lowering the flammability of a non-aqueous electrolyte when included in the non-aqueous electrolyte and improving the life properties of a battery by forming an electrode-electrolyte interface which is stable at high temperatures and low in resistance, and relates to a compound represented by Formula I descried herein, a non-aqueous electrolyte solution and a lithium secondary battery both including the compound, n, m, Ak, and X are described herein.
1 . A compound represented by Formula I:
wherein, in Formula I,
n and m are each independently 1 or 2,
Ak is a substituted or unsubstituted C 1 -C 10 alkylene group, and
X is a C 1 -C 10 alkyl group substituted with one or more halogen elements; a —Y1-C≡C-Y2 group; or a —Y1-CN group, wherein the Y1 is a direct linkage; or a substituted or unsubstituted C 1 -C 10 alkylene group; and the Y2 is hydrogen; or a substituted or unsubstituted C 1 -C 10 alkyl group.
2 . The compound of claim 1 , wherein the Ak is an unsubstituted C 1 -C 6 alkylene group.
3 . The compound of claim 1 , wherein the X is a C 1 -C 6 alkyl group substituted with one or more halogen elements.
4 . The compound of claim 1 , wherein the X is a —Y1′-C≡C-Y2′ group, wherein the Y1′ is an unsubstituted C 1 -C 6 alkylene group; and the Y2′ is hydrogen; or an unsubstituted C 1 -C 6 alkyl group.
5 . The compound of claim 1 , wherein the X is a —Y1′—CN group, wherein the Y1′ is an unsubstituted C 1 -C 6 alkylene group.
6 . The compound of claim 1 , wherein the compound represented by Formula I is a compound which is a compound represented by Formula 1:
wherein in Formula 1,
n, m, AK, and X are described as in Formula I.
7 . The compound of claim 1 , wherein the compound represented by Formula I is a compound which is any one among compounds represented by Formula a to Formula f:
8 . A non-aqueous electrolyte solution comprising an organic solvent; a lithium salt; and a compound according to claim 1 .
9 . The non-aqueous electrolyte solution of claim 8 , wherein the compound is included in an amount of 0.01 wt % to 10 wt % based on the total weight of the non-aqueous electrolyte solution.
10 . A lithium secondary battery comprising a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, a separator interposed between the positive electrode and the negative electrode, and the non-aqueous electrolyte solution according to claim 8 .