Rechargeable lithium battery including a novel electrolyte composition
First Claim
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1. A rechargeable lithium battery comprising:
- a negative electrode including a non-carbon-based negative active material, wherein the non-carbon-based negative electrode comprises at least one selected from the group consisting of Si, silicon oxide (SiOx, 0<
X>
2), Si-M (M is at least one metal selected from the group consisting of Al, Sn, Ag, Fe, Bi, Zn, In, Ge, Pb, and Ti), SnO2, Sn, and combinations thereof;
a positive electrode including a positive active material that reversibly intercalates and deintercalates lithium ions; and
an electrolyte consisting essentially of;
a non-aqueous organic solvent that includes ethylene carbonate in an amount of 20 volume % or less based on a total volume of the non-aqueous organic solvent, a lithium salt including LiPF6, a first additive represented by the following Formula 1 and a second additive that is LiB(C2O4)2 in an amount of about 0.1 to about 5 parts by weight based on 100 parts by weight of the electrolyte,wherein the electrolyte has a viscosity of 3.02 cP or less;
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Abstract
The rechargeable lithium battery includes: a negative electrode including a non-carbon-based negative active material; a positive electrode including a positive active material that reversibly intercalates and deintercalates lithium ions; and an electrolyte that includes a non-aqueous organic solvent that includes ethylene carbonate in an amount of 20 volume % or less, a lithium salt including LiPF6, a first additive represented by the following Formula 1 and a second additive that is LiB(C2O4)2. The electrolyte has a viscosity of 3.02 cP or less:
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- wherein, R1 and R2 are independently selected from the group consisting of hydrogen, a halogen, a cyano (CN), a nitro (NO2), and a C1 to C5 fluoroalkyl, provided that at least one of R1 and R2 is selected from the group consisting of a halogen, a cyano (CN), a nitro (NO2), and a C1 to C5 fluoroalkyl.
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13 Claims
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1. A rechargeable lithium battery comprising:
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a negative electrode including a non-carbon-based negative active material, wherein the non-carbon-based negative electrode comprises at least one selected from the group consisting of Si, silicon oxide (SiOx, 0<
X>
2), Si-M (M is at least one metal selected from the group consisting of Al, Sn, Ag, Fe, Bi, Zn, In, Ge, Pb, and Ti), SnO2, Sn, and combinations thereof;a positive electrode including a positive active material that reversibly intercalates and deintercalates lithium ions; and an electrolyte consisting essentially of;
a non-aqueous organic solvent that includes ethylene carbonate in an amount of 20 volume % or less based on a total volume of the non-aqueous organic solvent, a lithium salt including LiPF6, a first additive represented by the following Formula 1 and a second additive that is LiB(C2O4)2 in an amount of about 0.1 to about 5 parts by weight based on 100 parts by weight of the electrolyte,wherein the electrolyte has a viscosity of 3.02 cP or less; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification