ADDITIVE FOR NON-AQUEOUS ELECTROLYTE AND SECONDARY BATTERY USING THE SAME

• US 20100099905A1
• Filed: 12/29/2009
• Published: 04/22/2010
• Est. Priority Date: 04/20/2005
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: LEE, Ho Chun, CHA, Hye Yun, KIM, Hyeong Jin, KIM, Yu Sin
• Granted Patent: US 7,914,707 B2
• Time in Patent Office: Days
• US Class Current: 558/426
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0567 characterised by the additives
• CPC Class Codes: H01M 10/0569 characterised by the solvents
• CPC Class Codes: H01M 10/4235 Safety or regulating additives or arrangements in electrodes, separators or electrolyte H01M10/4242 takes precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Disclosed is a compound represented by the following formula 1:

• • wherein, each of R¹˜R¹³ independently represents —H, —F, —Cl, —Br, —I, —OH, —SH, —COOH, —PO₃H₂, —NH₂, —NO₂, —O(CH₂CH₂O)_nH (wherein, n is an integer of 1˜5), C₁˜C₁₂ alkyl group, C₁˜C₁₂ aminoalkyl group, C₁˜C₁₂ hydroxyalkyl group, C₁˜C₁₂ haloalkyl group, C₂˜C₁₂ alkenyl group, C₁˜C₁₂ alkoxy group, C₁˜C₁₂ alkylamino group, C₁˜C₁₂ dialkylamino group, C₆˜C₁₈ aryl group, C₆˜C₁₈ aminoaryl group, C₆˜C₁₈ hydroxyaryl group, C₆˜C₁₈ haloaryl group, C₇˜C₁₈ benzyl group, C₇˜C₁₈ aminobenzyl group, C₇˜C₁₈ hydroxybenzyl group, C₇˜C₁₈ halobenzyl group, or nitrile group (—CN); and at least one of R⁴˜R¹³ is nitrile group (—CN). A non-aqueous electrolyte comprising: (i) a lithium salt, (ii) a solvent, and (iii) a compound represented by formula 1; and a secondary battery comprising the non-aqueous electrolyte are also disclosed. When the compound represented by formula 1 is added to a non-aqueous electrolyte, it is possible to improve the safety of a secondary battery in an overcharged state.

Claims

1. A compound represented by the following formula 1:

wherein each of R¹˜

R¹³ independently represents —

H, —

F, —

Cl, —

Br, —

I, —

OH, —

SH, —

COOH, —

PO₃H₂, —

NH₂, —

NO₂, —

O(CH₂CH₂O)_nH (wherein n is an integer of 1˜

5), C₁˜

C₁₂ alkyl group, C₁˜

C₁₂ aminoalkyl group, C₁˜

C₁₂ hydroxyalkyl group, C₁˜

C₁₂ haloalkyl group, C₂˜

C₁₂ alkenyl group, C₁˜

C₁₂ alkoxy group, C₁˜

C₁₂ alkylamino group, C₁˜

C₁₂ dialkylamino group, C₆˜

C₁₈ aryl group, C₆˜

C₁₈ aminoaryl group, C₆˜

C₁₈ hydroxyaryl group, C₆˜

C₁₈ haloaryl group, C₇˜

C₁₈ benzyl group, C₇˜

C₁₈ aminobenzyl group, C₇˜

C₁₈ hydroxybenzyl group, C₇˜

C₁₈ halobenzyl group, or nitrile group (—

CN); and

at least one of R⁴˜

R¹³ is nitrile group (—

CN).

2. The compound according to claim 1, wherein at least two R¹˜

R¹³ are nitrile group (—

CN).

3. The compound according to claim 1, wherein at least two R⁴˜

R¹³ are nitrile group (—

CN).

4. The compound according to claim 1, wherein the compound is selected from the group consisting of formula 2, formula 3 and formula 4:

wherein each of R¹˜

R¹¹ independently represents —

H, —

F, —

Cl, —

Br, —

I, —

OH, —

SH, —

COOH, —

PO₃H₂, —

NH₂, —

NO₂, —

O(CH₂CH₂O)_nH (wherein n is an integer of 1˜

5), C₁˜

C₁₂ alkyl group, C₁˜

C₁₂ aminoalkyl group, C₁˜

C₁₂ hydroxyalkyl group, C₁˜

C₁₂ haloalkyl group, C₂˜

C₁₂ alkenyl group, C₁˜

C₁₂ alkoxy group, C₁˜

C₁₂ alkylamino group, C₁˜

C₁₂ dialkylamino group, C₆˜

C₁₈ aryl group, C₆˜

C₁₈ aminoaryl group, C₆˜

C₁₈ hydroxyaryl group, C₆˜

C₁₈ haloaryl group, C₇˜

C₁₈ benzyl group, C₇˜

C₁₈ aminobenzyl group, C₇ ˜

C₁₈ hydroxybenzyl group, C₇˜

C₁₈ halobenzyl group, or nitrile group (—

CN);

wherein each of R¹˜

R³ is the same as defined in the above formula 2; and

wherein each of R¹˜

R³ is the same as defined in the above formula 2.