Additive, and lithium secondary battery electrolyte and lithium battery which comprise same

Patent metadata

Field	Value
Publication number	US-12469882-B2
Application number	US-202118003679-A
Country	US
Kind code	B2
Filing date	Dec 6, 2021
Priority date	Jan 21, 2021
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

Provided are an additive represented by Chemical Formula 1, an electrolyte for a lithium secondary battery including the same, and a lithium secondary battery.The details of Chemical Formula 1 are as set forth in the specification.

First claim

The invention claimed is:

1 . An additive represented by Chemical Formula 1:

Wherein, in Chemical Formula 1,
X 1 and X 2 are each independently O or S, and
L 1 and L 2 are each independently O, S, or a substituted or unsubstituted C1 to C10 alkylene group,
R 1 to R 4 are each independently hydrogen, a halogen, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a substituted or unsubstituted C1 to C10 acyl group, a substituted or unsubstituted C2 to C10 alkenyl group, a substituted or unsubstituted C3 to C10 cycloalkyl group, a substituted or unsubstituted C3 to C10 cycloalkenyl group, a substituted or unsubstituted C2 to C10 alkynyl group, a substituted or unsubstituted C3 to C10 cycloalkynyl group, or a substituted or unsubstituted C6 to C20 aryl group,
Y 1 and Y 2 are each independently a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a substituted or unsubstituted C1 to C10 acyl group, a substituted or unsubstituted C2 to C10 alkenyl group, a substituted or unsubstituted C3 to C10 cycloalkyl group, a substituted or unsubstituted C3 to C10 cycloalkenyl group, a substituted or unsubstituted C2 to C10 alkynyl group, a substituted or unsubstituted C3 to C10 cycloalkynyl group, or a substituted or unsubstituted C6 to C20 aryl group, and
n and m are each independently one of integers ranging from 1 to 20.

2 . The additive of claim 1 , wherein
L 1 and L 2 are each independently O or S.

3 . The additive of claim 1 , wherein
Y 1 and Y 2 are each independently a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a substituted or unsubstituted C1 to C10 acyl group, a substituted or unsubstituted C2 to C10 alkenyl group, a substituted or unsubstituted C2 to C10 alkynyl group, or a substituted or unsubstituted C6 to C20 aryl group.

4 . The additive of claim 1 , wherein
Y 1 and Y 2 are each independently a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a substituted or unsubstituted C1 to C10 acyl group, or a substituted or unsubstituted C6 to C20 aryl group.

5 . The additive of claim 1 , wherein
Y 1 and Y 2 are each independently a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, or a substituted or unsubstituted C1 to C10 acyl group.

6 . The additive of claim 1 , wherein
n and m are each independently one of integers ranging from 1 to 10.

7 . The additive of claim 1 , wherein
Chemical Formula 1 is represented by Chemical Formula 1A:

wherein, in Chemical Formula 1A,
Y 1 , Y 2 , R 1 to R 4 , n, and m are as defined in claim 1 .

8 . An electrolyte for a lithium secondary battery, comprising
a non-aqueous organic solvent, a lithium salt, and the additive of claim 1 .

9 . The electrolyte of claim 8 , wherein
the additive is included in an amount of 0.1 wt % to 5.0 wt % based on the total weight of the electrolyte for the lithium secondary battery.

10 . A lithium secondary battery comprising
a positive electrode including a positive electrode active material; a negative electrode including a negative electrode active material; and the electrolyte for the lithium secondary battery of claim 8 .

11 . The lithium secondary battery of claim 10 , wherein
the positive electrode active material is represented by Chemical Formula 5:
Li x M 1 y M 2 z M 3 1-y-z O 2   [Chemical Formula 5]

wherein, in Chemical Formula 5, 0.5≤x≤1.8, 0<y≤1, 0≤z≤1, 0≤y+z≤1, and M 1 , M 2 , and M 3 are each independently any one selected from a metal of Ni, Co, Mn, Al, Sr, Mg, or La, and a combination thereof.

12 . The lithium secondary battery of claim 10 , wherein
the positive electrode active material is a lithium composite oxide represented by Chemical Formula 5-1 or Chemical Formula 5-2:
Li x1 Ni y1 Co z1 Al 1-y1-z1 O 2   [Chemical Formula 5-1]

wherein, in Chemical Formula 5-1, 1≤x1≤1.2, 0<y1<1, and 0<z1<1, and
Li x2 Ni y2 CO z2 Mn 1-y2-z2 O 2   [Chemical Formula 5-2]

wherein, in Chemical Formula 5-2, 1≤x2≤1.2, 0<y2<1, and 0<z2<1.

Assignees

• Samsung Sdi Co Ltd
• Univ Sogang Res & Business Development Found

Inventors

• Lee Tae Jin
• Moon Bongjin
• Bang Youngchan
• Cho Wonseok
• Kim Soojin
• Kim Sanghoon
• Park Injun
• Woo Myungheui
• Lee Junyong
• Jeong Hyejeong

Classifications

• H01M2300/004

  Three solvents · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• C08G75/16

  by polycondensation of organic compounds with inorganic polysulfides · CPC title