Oligomer additive and lithium battery

Patent metadata

Field	Value
Publication number	US-9988495-B2
Application number	US-201615081810-A
Country	US
Kind code	B2
Filing date	Mar 25, 2016
Priority date	Jan 22, 2016
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

An oligomer additive is provided. The oligomer additive is obtained by a reaction of a maleimide, a barbituric acid and a dibenzyl trithiocarbonate. A lithium battery including an anode, a cathode, a separator, an electrolyte solution and a package structure is also provided, wherein the cathode includes the oligomer additive.

First claim

What is claimed is:

1. An oligomer additive is obtained by a reaction of a maleimide, a barbituric acid and a dibenzyl trithiocarbonate.

2. The oligomer additive according to claim 1 , wherein a molar ratio of the maleimide to the barbituric acid is between 1:1 and 4:1.

3. The oligomer additive according to claim 1 , wherein a usage amount of the maleimide is 70.8 parts by weight to 90.6 parts by weight, a usage amount of the barbituric acid is 29.2 parts by weight to 9.4 parts by weight, and a usage amount of the dibenzyl trithiocarbonate is 1 part by weight to 10 parts by weight, based on 100 parts by weight of a total weight of the maleimide and the barbituric acid.

4. The oligomer additive according to claim 1 , wherein the maleimide comprises a mono-maleimide or a bismaleimide, wherein the mono-maleimide is selected from the group consisting of N-phenylmaleimide, N-(o-methylphenyl)-maleimide, N-(m-methylphenyl)-maleimide, N-(p-methylphenyl)-maleimide, N-cyclohexylmaleimide, maleimidophenol, maleimidobenzocyclobutene, phosphorus-containing maleimide, phosphonate-containing maleimide, siloxane-containing maleimide, N-(4-tetrahydropyranyl-oxyphenyl)maleimide, and 2,6-xylylmaleimide, and the bismaleimide has a structure represented by formula 1:

wherein R 1 comprises:

5. The oligomer additive according to claim 1 , wherein the barbituric acid has a structure represented by formula 2:

wherein R 2 and R 3 are each independently selected from the group consisting of —H, —CH 3 , —C 2 H 5 , —C 6 H 5 , —CH(CH 3 ) 2 , —CH 2 CH(CH 3 ) 2 , —CH 2 CH 2 CH(CH 3 ) 2 , and

6. A lithium battery, comprising:
an anode;
a cathode configured separately from the anode, wherein the cathode comprises the oligomer additive according to claim 1 ;
a separator disposed between the anode and the cathode, wherein the separator, the anode, and the cathode define a housing region;
an electrolyte solution disposed in the housing region; and
a package structure packaging the anode, the cathode, and the electrolyte solution.

7. The lithium battery according to claim 6 , wherein the electrolyte solution comprises an organic solvent, a lithium salt, and an additive.

8. The lithium battery according to claim 7 , wherein the additive comprises mono-maleimide, polymaleimide, bismaleimide, polybismaleimide, a copolymer of bismaleimide and mono-maleimide, vinylene carbonate, or a mixture thereof.

Assignees

• Univ Nat Taiwan Science & Technology
• Ind Tech Res Inst

Inventors

• Wang Fu-Ming
• Hwang Bing-Joe
• Chern Chorng-Shyan
• Hsu Jung-Mu
• Pan Jing-Pin
• Yang Chang-Rung

Classifications

• H01M10/052

  Li-accumulators · CPC title

• C08G75/28 Primary

  Polythiocarbonates · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/0567

  characterised by the additives · CPC title

• C08G73/00

  Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00 {(polycarbodiimides prepared from isocyanates C08G18/025, C08G18/797)} · CPC title