Back to results
US 10,541,444 B2Granted
Rechargeable lithium battery
AssigneeSamsung SDI Co., Ltd.
InventorsHironari Takase, Hokuto Yokotsuji
Life of this patent
Estimating the term…
Abstract
A rechargeable lithium battery includes: a positive electrode including a positive active material; and an electrolyte solution including a solvent and an additive, wherein the positive active material includes a lithium-containing transition metal oxide, the solvent includes a hydrofluoroether, and the additive includes a first additive represented by Chemical Formula 1 and at least one selected from a second additive represented by Chemical Formula 2, a third additive represented by Chemical Formula 3, and a fourth additive represented by Chemical Formula 4.
Claims14
A rechargeable lithium battery, comprising:
- a positive electrode comprising a positive active material;
- and
- an electrolyte solution comprising a solvent and an additive,
- wherein the positive active material comprises a lithium-containing transition metal oxide,
- the solvent comprises a hydrofluoroether in an amount of about 10 to about 60 volume % based on the total volume of the solvent, and
- the additive comprises:
- a first additive represented by Chemical Formula 1 in an amount of about 0.01 to about 1.5 wt % based on the total weight of the electrolyte solution, and
- at least one additional additive selected from the group consisting of an additive represented by Chemical Formula 2, an additive represented by Chemical Formula 3, and an additive represented by Chemical Formula 4:
- wherein, in Chemical Formula 1,
- R1 to R3 are each independently selected from a C1 to C8 alkyl group substituted or unsubstituted with a vinyl group or a C1 to C5 alkyl group and not including a double bond, a C1 to C8 alkyl group substituted or unsubstituted with a vinyl group or a C1 to C5 alkyl group and including a double bond, a C2 to C8 alkenyl group, a C5 to C8 cycloalkyl group, a C6 to C8 aryl group, and a fluorine atom, and
- R4 is selected from a C2 to C8 alkynylene group, a C4 to C8 alkylene group having two more ether groups and/or at least one thioether group, a C1 to C8 alkylene group having two or more of —CF2— linking groups, and a C4 to C10 alkylene group having an ether group and a thioether group,
- wherein, in Chemical Formula 2,
- R5 is selected from a C2 to C6 alkylene group without a double bond, a C2 to C6 alkylene group with a double bond, and a C6 to C12 arylene group, and
- R6 to R11 are each independently selected from a C1 to C6 alkyl group and a C2 to C6 alkenyl group,
- wherein, in Chemical Formula 3,
- R12 and R13 are each independently selected from hydrogen and a C1 to C8 alkyl group, and
- R14 is selected from a C1 to C8 alkyl group substituted or unsubstituted with a vinyl group, a C2 to C8 alkenyl group, a C2 to C8 alkynyl group, and a C1 to C8 halogenated alkyl group,
- wherein, in Chemical Formula 4,
- R15 and R16 are each independently selected from hydrogen and a C1 to C8 alkyl group,
- R17 is selected from a C1 to C8 alkyl group, a C2 to C8 alkenyl group, a C2 to C8 alkynyl group, and a C1 to C8 halogenated alkyl group, and
- n is 1 or 2.
18 more elements
A rechargeable lithium battery, comprising:
- a positive electrode comprising a positive active material;
- and
- an electrolyte solution comprising a solvent and an additive,
- wherein the positive active material comprises a lithium-containing transition metal oxide,
- the solvent comprises a hydrofluoroether in an amount of about 10 to about 60 volume % based on the total volume of the solvent, and
- the additive comprises:
- a first additive comprising at least one selected from compounds represented by Chemical Formulae 1-1, 1-2, 1-4, and 1-6 to 1-9, the first additive being in an amount of about 0.01 to about 1.5 wt % based on the total weight of the electrolyte solution, and
- at least one additional additive selected from the group consisting of an additive represented by Chemical Formula 2, an additive represented by Chemical Formula 3, and an additive represented by Chemical Formula 4:
- wherein, in Chemical Formula 2,
- R5 is selected from a C2 to C6 alkylene group without a double bond, a C2 to C6 alkylene group with a double bond, and a C6 to C12 arylene group, and
- R6 to R11 are each independently selected from a C1 to C6 alkyl group and a C2 to C6 alkenyl group,
- wherein, in Chemical Formula 3,
- R12 and R13 are each independently selected from hydrogen and a C1 to C8 alkyl group, and
- R14 is selected from a C1 to C8 alkyl group substituted or unsubstituted with a vinyl group, a C2 to C8 alkenyl group, a C2 to C8 alkynyl group, and a C1 to C8 halogenated alkyl group,
- wherein, in Chemical Formula 4,
- R15 and R16 are each independently selected from hydrogen and a C1 to C8 alkyl group,
- R17 is selected from a C1 to C8 alkyl group, a C2 to C8 alkenyl group, a C2 to C8 alkynyl group, and a C1 to C8 halogenated alkyl group, and
- n is 1 or 2.
15 more elements
Dependencies are inferred from the claim text.