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US 8,524,401 B2Granted
Electrolyte for lithium battery and lithium battery including the same
AssigneeSamsung SDI Co., Ltd.
InventorsYong-Beom Lee, Sun-Young Kim, Bo-Ra Lee, Sin-Young Park
Life of this patent
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Abstract
An electrolyte for a lithium battery and a lithium battery including the electrolyte.
Claims16
A lithium battery comprising:
- a negative electrode comprising a negative active material;
- a positive electrode comprising a positive active material;
- and
- an electrolyte,
- wherein the electrolyte comprises a nonaqueous organic solvent, lithium salt, a first compound represented by Formula 1 below, and a second compound represented by Formula 2 below:
- wherein,
- Q1 is a C2-C30 alkyl group substituted with one or more —F;
- Q2 is a C1-C30 alkyl group, a C2-C30 alkenyl group, a C2-C30 alkynyl group, a C1-C30 alkyl group substituted with one or more —F, a C2-C30 alkenyl group substituted with one or more —F, or a C2-C30 alkynyl group substituted with one or more —F;
- R1 through R6 in the second compound are each independently selected from the group consisting of —F and —OT1, wherein T1 is a C1-C30 alkyl group;
- a C2-C30 alkenyl group;
- a C2-C30 alkynyl group;
- a C6-C12 cycloalkyl group;
- a C5-C30 aryl group;
- a C1-C30 alkyl group substituted with at least one substituent selected from the group consisting of —F, a hydroxyl group, and a carboxyl group;
- a C2-C30 alkenyl group substituted with at least one substituent selected from the group consisting of —F, a hydroxyl group, and a carboxyl group;
- a C2-C30 alkynyl group substituted with at least one substituent selected from the group consisting of —F, a hydroxyl group, and a carboxyl group;
- a C6-C12 cycloalkyl group substituted with at least one substituent selected from the group consisting of —F, a hydroxyl group, and a carboxyl group;
- or a C5-C30 aryl group substituted with at least one substituent selected from the group consisting of —F, a hydroxyl group, and a carboxyl group, wherein a case where all R1 through R6 are —F or —OT1 is excluded and the number ratio of fluorine atoms to hydrogen atoms in the first compound is 1 or above,
- wherein an amount of the first compound is in a range of about 10 parts by volume to about 30 parts by volume based on 100 parts by volume of a total volume of the nonaqueous organic solvent, the first compound, and the second compound, and
- wherein an amount of the second compound is in a range of 5 parts by volume to about 10 parts by volume based on 100 parts by volume of a total volume of the nonaqueous organic solvent, the first compound, and the second compound.
17 more elements
An electrolyte for a lithium battery, comprising:
- a nonaqueous organic solvent, a lithium salt, a first compound represented by Formula 1 below, and a second compound represented by Formula 2 below:
- wherein,
- Q1 is a C2-C30 alkyl group substituted with one or more —F;
- Q2 is a C1-C30 alkyl group, a C2-C30 alkenyl group, a C2-C30 alkynyl group, a C1-C30 alkyl group substituted with one or more —F, a C2-C30 alkenyl group substituted with one or more —F, or a C2-C30 alkynyl group substituted with one or more —F;
- R1 through R6 in the second compound are each independently selected from the group consisting of —F and —OT1, wherein T1 is a C1-C30 alkyl group;
- a C2-C30 alkenyl group;
- a C2-C30 alkynyl group;
- a C6-C12 cycloalkyl group;
- a C5-C30 aryl group;
- a C1-C30 alkyl group substituted with at least one substituent selected from the group consisting of —F, a hydroxyl group, and a carboxyl group;
- a C2-C30 alkenyl group substituted with at least one substituent selected from the group consisting of —F, a hydroxyl group, and a carboxyl group;
- a C2-C30 alkynyl group substituted with at least one substituent selected from the group consisting of —F, a hydroxyl group, and a carboxyl group;
- a C6-C12 cycloalkyl group substituted with at least one substituent selected from the group consisting of —F, a hydroxyl group, and a carboxyl group;
- or a C5-C30 aryl group substituted with at least one substituent selected from the group consisting of —F, a hydroxyl group, and a carboxyl group, wherein a case where all R1 through R6 are —F or —OT1 is excluded and the number ratio of fluorine atoms to hydrogen atoms in the first compound is 1 or above,
- wherein an amount of the first compound is in a range of about 10 parts by volume to about 30 parts by volume based on 100 parts by volume of a total volume of the nonaqueous organic solvent, the first compound, and the second compound, and
- wherein an amount of the second compound is in a range of 5 parts by volume to about 10 parts by volume based on 100 parts by volume of a total volume of the nonaqueous organic solvent, the first compound, and the second compound.
13 more elements
Dependencies are inferred from the claim text.