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Electrolyte for lithium secondary battery and lithium secondary battery containing the same

A lithium secondary battery and electrolyte technology, which is applied in the direction of non-aqueous electrolyte batteries, secondary batteries, electrolytes, etc., can solve the problems of elution and destruction of positive electrode transition metals, etc.

Active Publication Date: 2020-07-31
HYUNDAI MOTOR CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]For example, HF may destroy the CEI of the positive electrode and the SEI of the negative electrode and may further cause the elution of transition metals in the positive electrode

Method used

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  • Electrolyte for lithium secondary battery and lithium secondary battery containing the same
  • Electrolyte for lithium secondary battery and lithium secondary battery containing the same
  • Electrolyte for lithium secondary battery and lithium secondary battery containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] Preparation of Example 1

[0126] Example 1 was prepared under the same conditions as Comparative Example 1, except that the electrolyte further included an additive of the following chemical formula (1).

[0127] Chemical formula (1)

[0128]

Embodiment 2

[0129] Preparation of Example 2

[0130] Example 2 was prepared under the same conditions as Comparative Example 1, except that the electrolyte further included an additive of the following chemical formula (2).

[0131] Chemical formula (2)

[0132]

Embodiment 3

[0133] Preparation of Example 3

[0134] Example 3 was prepared under the same conditions as Comparative Example 1, except that the electrolyte further included an additive of the following chemical formula (3).

[0135] Chemical formula (3)

[0136]

[0137] The preparation of embodiment 4-6

[0138] Example 4 was prepared under the same conditions as Comparative Example 2, except that the electrolyte further included 0.5% by weight of the additive of chemical formula (1) based on the total weight of the electrolyte.

[0139] Example 5 was prepared under the same conditions as Comparative Example 2, except that the electrolyte further included 0.5% by weight of the additive of chemical formula (2) based on the total weight of the electrolyte.

[0140] Example 6 was prepared under the same conditions as Comparative Example 3, except that the electrolyte further included 0.5% by weight of the additive of chemical formula (3) based on the total weight of the electrolyte...

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PUM

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Abstract

Disclosed are an electrolyte for a lithium secondary battery and a lithium secondary battery containing the same. The electrolyte for the lithium secondary battery includes a lithium salt, a solvent component and an additive including one or more of the following compounds,wherein each of R1, R2and R3is independently hydrogen, an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, or an arylalkyl group having 6 to 30 carbon atoms.

Description

technical field [0001] The present invention relates to an electrolyte for a lithium secondary battery and a lithium secondary battery including the same. Background technique [0002] With the development of technology and the increase in demand for mobile devices, the demand for secondary batteries as energy sources is rapidly increasing, in which lithium secondary batteries having high energy density and high voltage are widely used. Generally, a lithium secondary battery includes a negative electrode, a positive electrode, a separator disposed between the electrodes, and an electrolyte in which an appropriate amount of lithium salt is dissolved in an organic solvent. [0003] In the related art, for example, in currently used secondary battery electrolytes, various side reactions occur due to repeated charge and discharge, and by-products generated by such side reactions are factors that degrade battery performance. In particular, when the electrolyte contains LiPF 6 L...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/052
CPCH01M10/0567H01M10/052H01M2300/0025H01M10/0525H01M2220/20H01M10/0568Y02E60/10H01M10/4235H01M10/0569H01M2300/004H01M2300/0042
Inventor 李尹圣赵廷英金益圭吴承旼金东熺崔南顺金高恩李注妍朴晟志
Owner HYUNDAI MOTOR CO LTD
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