Electrolyte for rechargeable lithium battery and rechargeable lithium battery including same
View Patent ↗Disclosed is an electrolyte for a rechargeable lithium battery and a rechargeable lithium battery including the same, and the electrolyte includes a lithium salt composition including a first lithium salt; and a second lithium salt of lithium bisfluorosulfonyl imide represented by the following Chemical Formula 1 at a mole ratio of 1:0.05 to 1:1, and a non-aqueous organic solvent.
1. An electrolyte for a rechargeable lithium battery, comprising:
a lithium salt composition including:
a first lithium salt;
a second lithium salt of lithium bisfluorosulfonyl imide represented by the following Chemical Formula 1;
the first lithium salt to second lithium salt mole ratio is between about 1:0.05 to about 1:1; and
a non-aqueous organic solvent;
2. The electrolyte for a rechargeable lithium battery of claim 1 , wherein the first lithium salt to second lithium salt mole ratio is between about 1:0.25 to about 1:0.43.
3. The electrolyte for a rechargeable lithium battery of claim 1 , wherein the second lithium salt is present at about 0.05M to about 0.5M.
4. The electrolyte for a rechargeable lithium battery of claim 1 , wherein the first lithium salt is present at about 0.5M to about 1.3M.
5. The electrolyte for a rechargeable lithium battery of claim 1 , wherein the first lithium salt comprises LiPF 6 , LiBF 4 , LiSbF 6 , LiAsF 6 , LiClO 4 , LiAlO 4 , LiAlCl 4 , LiSO 3 CF 3 , or combinations thereof.
6. The electrolyte for a rechargeable lithium battery of claim 1 , wherein the first lithium salt comprises LiPF 6 .
7. A rechargeable lithium battery comprising:
an electrolyte comprising a lithium salt composition including:
a first lithium salt;
a second lithium salt of lithium bisfluorosulfonyl imide represented by the following Chemical Formula 1;
the first lithium salt to second lithium salt mole ratio is between about 1:0.05 to about 1:1; and
a non-aqueous organic solvent;
a positive electrode including a positive active material; and
a negative electrode including a negative active material;
8. The rechargeable lithium battery of claim 7 , wherein the first lithium salt to second lithium salt mole ratio is between about 1:0.25 to about 1:0.43.
9. The rechargeable lithium battery of claim 7 , wherein the second lithium salt is present at about 0.05M to about 0.5M.
10. The rechargeable lithium battery of claim 7 , wherein the first lithium salt is present at about 0.5M to about 1.3M.
11. The rechargeable lithium battery of claim 7 , wherein the first lithium salt comprises LiPF 6 , LiBF 4 , LiSbF 6 , LiAsF 6 , LiClO 4 , LiAlO 4 , LiAlCl 4 , LiSO 3 CF 3 , or combinations thereof.
12. The rechargeable lithium battery of claim 7 , wherein the first lithium salt comprises LiPF 6 .