Anode electrode material and lithium ion battery using the same

Patent metadata

Field	Value
Publication number	US-2017214046-A1
Application number	US-201715481947-A
Country	US
Kind code	A1
Filing date	Apr 7, 2017
Priority date	Oct 17, 2014
Publication date	Jul 27, 2017
Grant date	—

Abstract

An anode binder includes a polymer obtained by polymerizing a maleimide type monomer with an organic diamine type compound. A lithium ion battery includes an anode electrode, an electrolyte, a separator, and an anode electrode. The anode electrode includes an anode active material, a conducting agent, and the anode binder.

First claim

What is claimed is:

1 . An anode electrode material comprising an anode binder, wherein the anode binder comprises a polymer obtained by polymerizing a maleimide type monomer with an organic diamine type compound;
the maleimide type monomer is selected from the group consisting of maleimide monomer, bismaleimide monomer, multimaleimide monomer, maleimide type derivative monomer, and combinations thereof; and the organic diamine type compound is represented by formula III or formula IV:

wherein R 3 is a bivalent organic substituent and R 4 is another bivalent organic substituent.

2 . The anode electrode material of claim 1 , wherein R 3 is selected from the group consisting of —(CH 2 ) n —, —CH 2 —O—CH 2 —, —CH(NH)—(CH 2 ) n —, phenylene, diphenylene, substituted phenylene, substituted diphenylene, and bivalent alicyclic group, R 4 is selected from the group consisting of —(CH 2 ) n —, —O—, —S—, —S—S—, —CH 2 —O—CH 2 —, —CH(NH)—(CH 2 ) n —, and —CH(CN)(CH 2 ) n —, and n=1 to 12.

3 . The anode electrode material of claim 1 , wherein the organic diamine type compound is selected from the group consisting of ethylenediamine, phenylenediamine, methylenedianiline, oxydianiline, and combinations thereof.

4 . The anode electrode material of claim 1 , wherein the maleimide monomer is represented by formula I:

wherein R 1 is a monovalent organic substitute.

5 . The anode electrode material of claim 4 , wherein Ri is selected from the group consisting of —R, —RNH 2 R, —C(O)CH 3 , —CH 2 OCH 3 , —CH 2 S(O)CH 3 , —C 6 H 5 , —C 6 H 4 C 6 H 5 , —CH 2 (C 6 H 4 )CH 3 , and monovalent alicyclic group; R is hydrocarbyl with 1 to 6 carbon atoms.

6 . The anode electrode material of claim 1 , wherein the maleimide monomer is selected from the group consisting of N-phenyl-maleimide, N-(p-tolyl)-maleimide, N-(m-tolyl)-maleimide, N-(o-tolyl)-maleimide, N-cyclohexyl-maleimide, maleimide, maleimidephenol, maleimidebenzocyclobutene, dimethylphenyl-maleimide, N-methyl-maleimide, ethenyl-maleimide, thio-maleimide, ketone-maleimide, methylene-maleimide, maleimide-methyl-ether, maleimide-ethanediol, 4-maleimide-phenyl sulfone, and combinations thereof.

7 . The anode electrode material of claim 1 , wherein the bismaleimide monomer is represented by formula II:

wherein R 2 is a bivalent organic substitute.

8 . The anode electrode material of claim 7 , wherein R 2 is selected from the group consisting of —R—, —RNH 2 R—, —C(O)CH 2 —, —CH 2 OCH 2 , —C(O)—, —O—, —O—O—, —S—, —S—S—, —S(O)—, —CH 2 S(O)CH 2 —, —(O)S(O)—, —CH 2 (C 6 H 4 )CH 2 —, —CH 2 (C 6 H 4 )(O)—, —R—Si(CH 3 ) 2 —O—Si(CH 3 ) 2 —R—, —C 6 H 4 —, —C 6 H 4 C 6 H 4 —, bivalent alicyclic group or —(C 6 H 4 )—R 5 —(C 6 H 4 )—; R 5 is —CH 2 —, —C(O)—, —C(CH 3 ) 2 , —O—, —O—O—, —S—, —S—S—, —S(O)—, and —(O)S(O)—; and R is hydrocarbyl with 1 to 6 carbon atoms.

9 . The anode electrode material of claim 1 , wherein the bismaleimide monomer is selected from the group consisting of N,N′-bismaleimide-4,4′-diphenyl-methane, 1,1′-(methylene-di-4,1-phenylene)-bismaleimide, N,N′-(1,1′-diphenyl-4,4′-dimethylene)-bismaleimide, N,N′-(4-methyl-1,3-phenylene)-bismaleimide, 1,1′-(3,3′-dimethyl-1,1′-diphenyl-4,4′-dimethylene)-bismaleimide, N,N′-ethenyl-bismaleimide, N,N′-butenyl-bismaleimide, N,N′-(1,2-phenylene)-bismaleimide, N,N′-(1,3-phenylene)-bismaleimide, N,N′-thiodimaleimide, N,N′-dithiodimaleimide, N,N′-ketonedimaleimide, N,N′-methylene-bismaleimide, bismaleimidomethyl-ether, 1,2-bismaleimido-1,2-ethandiol, N,N′-4,4′-diphenyl-ether-bismaleimide, 4,4′-bismaleimido-diphenylsulfone, and combinations thereof.

10 . The anode electrode material of claim 1 , wherein a molecular weight of the polymer is in a range from about 1000 to about 50000.

11 . The anode electrode material of claim 1 , wherein a molar ratio of the maleimide type monomer to the organic diamine type compound is 1:10 to 10:1.

12 . The anode electrode material of claim 1 , wherein a molar ratio of the maleimide type monomer to the organic diamine type compound is 1:1 to 6:1.

13 . The anode electrode material of claim 1 , wherein a mass percent of the anode binder in the anode electrode material is in a range from about 0.1% to about 50%.

14 . The anode electrode material of claim 1 , wherein a mass percent of the anode binder in the anode electrode material is in a range from about 1% to about 20%.

15 . The anode electrode material of claim 1 , wherein the anode binder is consisted of the polymer.

16 . The anode electrode material of claim 1 , further comprises an anode active material selected from the group consisting of lithium titanate, graphite, mesophase carbon micro beads, acetylene black, mesocarbon miocrobead, carbon fibers, carbon nanotubes, cracked carbon, and combinations thereof.

17 . A lithium ion battery comprising:
a cathode electrode; an electrolyte; a separator; and an anode electrode, the anode electrode comprising a anode active material, a conducting agent, and a anode binder, wherein the anode binder comprises a polymer obtained by polymerizing a maleimide type monomer with an organic diamine type compound; the maleimide type monomer is selected from the group consisting of maleimide monomer, bismaleimide monomer, multimaleimide monomer, maleimide type derivative monomer, and combinations thereof; and the organic diamine type compound is represented by formula III or formula IV:

wherein R 3 is a bivalent organic substituent and R 4 is another bivalent organic substituent.

Assignees

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

Inventors

• Qian guan-nan
• He xiang-ming
• Wang Li
• Shang yu-ming
• Li Jian-Jun
• Luo Jing
• Gao Jian
• Wang yao-wu

Classifications

• H01M4/583

  Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• H01M4/621 Primary

  Binders · CPC title

• H01M10/0525

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

• H01M4/133

  Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title