Electrolyte additive, electrolyte and lithium ion battery using the same

Patent metadata

Field	Value
Publication number	US-9923241-B2
Application number	US-201514983501-A
Country	US
Kind code	B2
Filing date	Dec 29, 2015
Priority date	Jul 12, 2013
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

The present disclosure provides an electrolyte additive. The electrolyte additive comprises: maleimide derivative, bis-maleimide derivative, or combinations there of The structural formulas of maleimide derivative and bis-maleimide derivative respectively are:

wherein, R 1 , R 2 are selected from hydrogen atom and halogen atoms, R 3 is selected from silicon containing group, nitrogen containing group, fluorine containing group, phosphorus containing group, and a repeating ethoxy group. The present disclosure also provides an electrolyte liquid and a lithium ion battery using the electrolyte additive.

First claim

What is claimed is:

1. An electrolyte additive being bis-maleimide derivative, wherein a structural formula of the bis-maleimide derivative is:

wherein, R 1 , R 2 are selected from hydrogen atom and halogen atoms,
R 3 is selected from the group consisting of a silicon containing group, a nitrogen containing group, and a fluorine containing group,
the silicon containing group is selected from the group consisting of

 wherein R is an alkyl, and n is an integer that is larger than or equal to 3 and smaller than or equal to 8;
the nitrogen containing group is —R′OOCHN—R′—NH—COOR′—, wherein R′ is an alkylene;
the fluorine containing group is selected from the group consisting of

2. An electrolyte liquid comprising:
an alkali metal salt electrolyte;
a non-aqueous solvent; and
an electrolyte additive being bis-maleimide derivative, wherein a structural formula of the bis-maleimide derivative is:

wherein, R 1 , R 2 are selected from hydrogen atom and halogen atoms,
R 3 is selected from the group consisting of a silicon containing group, a nitrogen containing group, and a fluorine containing group,
the silicon containing group is selected from the group consisting of

 wherein R is an alkyl, and n is an integer that is larger than or equal to 3 and smaller than or equal to 8;
the nitrogen containing group is —ROOCHN—R—NH—COOR—, wherein R′ is an alkylene;
the fluorine containing group is selected from the group consisting of

3. The electrolyte liquid of claim 2 , wherein the electrolyte additive has a mass percentage of 0.1%-30%.

4. The electrolyte liquid of claim 2 , wherein the electrolyte additive has a mass percentage of 0.1%-10%.

5. A lithium ion battery comprising:
a cathode;
an anode;
a separator; and
an electrolyte liquid comprising:
an alkali metal salt electrolyte;
a non-aqueous solvent; and
an electrolyte additive being bis-maleimide derivative, wherein a structural formula of the bis-maleimide derivative is:

wherein, R 1 , R 2 are selected from hydrogen atom and halogen atoms, R 3 is selected from the group consisting of a silicon containing group, a nitrogen containing group, and a fluorine containing group
the silicon containing group is selected from the group consisting of

 wherein R is an alkyl, and n is an integer that is larger than or equal to 3and smaller than or equal to 8;
the nitrogen containing group is —ROOCHN—R—NH—COOR—, wherein R′ is an alkylene;
the fluorine containing group is selected from the group consisting of

6. The electrolyte additive of claim 1 , wherein R 3 is selected from the group consisting of a silicon containing group and a fluorine containing group,
the silicon containing group is selected from the group consisting of

 wherein R is an alkyl, and n is an integer that is larger than or equal to 3 and smaller than or equal to 8;
the fluorine containing group is selected from the group consisting of

7. The electrolyte additive of claim 1 , wherein R 3 is selected from the group consisting of

wherein R is an alkyl, and n is an integer that is larger than or equal to 3 and smaller than or equal to 8.

8. The electrolyte additive of claim 1 , wherein R 3 is

wherein R is an alkyl, and n is an integer that is larger than or equal to 3 and smaller than or equal to 8.

Assignees

• Jiangsu Huadong Inst Of Li Ion Battery Co Ltd
• Univ Tsinghua

Inventors

• Yang ju-ping
• He xiang-ming
• Wang Li
• Li Jian-Jun
• Shang yu-ming
• Gao Jian
• Wang yao-wu
• Guo Jian-Wei

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• C07F7/0849

  Chemistry & Metallurgy · mapped topic

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0567 Primary

  characterised by the additives · CPC title