Polymer, binder and negative electrode including the polymer, and lithium battery including the negative electrode

Patent metadata

Field	Value
Publication number	US-9748576-B2
Application number	US-201514589172-A
Country	US
Kind code	B2
Filing date	Jan 5, 2015
Priority date	Aug 12, 2014
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A polymer including a first repeating unit including at least one carboxyl group substituted with a cation and a second repeating unit including at least one carboxyl group substituted with a moiety containing a dihydroxyphenyl group.

First claim

What is claimed is:

1. A polymer comprising:
a first repeating unit comprising at least one carboxyl group substituted with a cation, wherein the cation comprises at least one selected from Li + , Na + , K + , and NH 4 + ; and
a second repeating unit comprising at least one carboxyl group substituted with a moiety comprising a dihydroxyphenyl group,
wherein the first repeating unit is represented by Formula 1 and the second repeating unit is represented by Formula 2:

wherein in Formula 1,
L is selected from a single bond, a substituted or unsubstituted C 1 -C 6 alkylene group, a substituted or unsubstituted C 1 -C 6 heteroalkylene group, a substituted or unsubstituted C 2 -C 6 alkenylene group, a substituted or unsubstituted C 2 -C 6 alkynylene group, a substituted or unsubstituted C 6 -C 10 arylene group, and a substituted or unsubstituted C 6 -C 10 heteroarylene group;
R 1 and R 2 are each independently selected from a hydrogen, a substituted or unsubstituted C 1 -C 30 alkyl group, a substituted or unsubstituted C 1 -C 30 alkoxy group, a substituted or unsubstituted C 2 -C 30 alkenyl group, a substituted or unsubstituted C 2 -C 30 alkynyl group, a substituted or unsubstituted C 6 -C 30 aryl group, a substituted or unsubstituted C 6 -C 30 aryloxy group, a substituted or unsubstituted C 7 -C 30 arylalkyl group, a substituted or unsubstituted C 7 -C 30 arylalkoxy group, a substituted or unsubstituted C 2 -C 30 heteroaryl group, a substituted or unsubstituted C 2 -C 30 heteroaryloxy group, a substituted or unsubstituted C 3 -C 30 heteroarylalkyl group, a substituted or unsubstituted C 3 -C 30 heteroarylalkoxy group, a substituted or unsubstituted C 4 -C 30 carbocyclic group, a substituted or unsubstituted C 4 -C 30 carbocyclic oxy group, a substituted or unsubstituted C 5 -C 30 carbocyclic alkyl group, a substituted or unsubstituted C 5 -C 30 carbocyclic alkoxy group, a substituted or unsubstituted C 2 -C 30 heterocyclic group, a substituted or unsubstituted C 2 -C 30 heterocyclic oxy group, a substituted or unsubstituted C 2 -C 30 heterocyclic alkyl group, and a substituted or unsubstituted C 2 -C 30 heterocyclic alkoxy group; and
R 5 and R 6 are each independently selected from a hydrogen, —C(═O)OH, and —C(═O)O-M, wherein M is selected from Li + , Na + , K + , and NH 4 + , at least one of R 5 and R 6 is —C(═O)O-M; and

wherein in Formula 2,
L 1 is selected from a single bond, a substituted or unsubstituted C 1 -C 6 alkylene group, a substituted or unsubstituted C 1 -C 6 heteroalkylene group, a substituted or unsubstituted C 2 -C 6 alkenylene group, a substituted or unsubstituted C 2 -C 6 alkynylene group, a substituted or unsubstituted C 6 -C 10 arylene group, and a substituted or unsubstituted C 6 -C 10 heteroarylene group;
R 3 and R 4 are each independently selected from a hydrogen, a substituted or unsubstituted C 1 -C 30 alkyl group, a substituted or unsubstituted C 1 -C 30 alkoxy group, a substituted or unsubstituted C 2 -C 30 alkenyl group, a substituted or unsubstituted C 2 -C 30 alkynyl group, a substituted or unsubstituted C 6 -C 30 aryl group, a substituted or unsubstituted C 6 -C 30 aryloxy group, a substituted or unsubstituted C 7 -C 30 arylalkyl group, a substituted or unsubstituted C 7 -C 30 arylalkoxy group, a substituted or unsubstituted C 2 -C 30 heteroaryl group, a substituted or unsubstituted C 2 -C 30 heteroaryloxy group, a substituted or unsubstituted C 3 -C 30 heteroarylalkyl group, a substituted or unsubstituted C 3 -C 30 heteroarylalkoxy group, a substituted or unsubstituted C 4 -C 30 carbocyclic group, a substituted or unsubstituted C 4 -C 30 carbocyclic oxy group, a substituted or unsubstituted C 5 -C 30 carbocyclic alkyl group, a substituted or unsubstituted C 5 -C 30 carbocyclic alkoxy group, a substituted or unsubstituted C 2 -C 30 heterocyclic group, a substituted or unsubstituted C 2 -C 30 heterocyclic oxy group, a substituted or unsubstituted C 2 -C 30 heterocyclic alkyl group, and a substituted or unsubstituted C 2 -C 30 heterocyclic alkoxy group; and
R 7 and R 8 are each independently selected from a hydrogen, —C(═O)OH, an amide group substituted with R a , and an ammonium carboxylate salt substituted with R a , wherein R a is a 3,4-dihydroxyphenyl group linked to an unsubstituted C 1 -C 5 alkylene group, provided that at least one of R 7 and R 8 is at least one selected from an amide group substituted with R a and an ammonium carboxylate salt substituted with R a .

2. The polymer of claim 1 , wherein the moiety comprising a dihydroxyphenyl group comprises at least one selected from a moiety comprising a 3,4-dihydroxyphenyl group linked to a C 1 -C 5 alkylene group substituted with a hydroxyl group, a moiety comprising a 3,4-dihydroxyphenyl group linked to an unsubstituted C 1 -C 5 alkylene group, a 3,4-dihydroxyphenyl group linked to a C 1 -C 5 heteroalkylene group substituted with a hydroxyl group, and a moiety comprising a 3,4-dihydroxyphenyl group linked to an unsubstituted C 1 -C 5 heteroalkylene group.

3. The polymer of claim 1 , wherein the moiety comprising a dihydroxyphenyl group comprises at least one selected from 2-(3,4-dihydroxyphenyl)ethyl-1-amine, 2-hydroxy-2-(3,4-dihydroxyphenyl)ethyl-1-amine, and 2-hydroxy-2-(3,4-dihydroxyphenyl)ethyl-1-methylamine.

4. The polymer of claim 1 , wherein the polymer has a weight average molecular weight in a range of about 100,000 Daltons to about 3,000,000 Daltons.

5. The polymer of claim 1 , wherein the polymer further comprises a third repeating unit represented by Formula 3 and a fourth repeating unit represented by Formula 4:

wherein in Formula 3,
R 9 and R 10 are each independently selected from a hydrogen and a substituted or unsubstituted C 1 -C 10 alkyl group,

wherein in Formula 4,
L 3 is selected from a single bond, a substituted or unsubstituted C 1 -C 10 alkylene group, a substituted or unsubstituted C 1 -C 10 heteroalkylene group, a substituted or unsubstituted C 2 -C 10 alkenylene group, a substituted or unsubstituted C 2 -C 10 alkynylene group, a substituted or unsubstituted C 6 -C 10 arylene group, a substituted or unsubstituted C 6 -C 10 heteroarylene group; and
R 11 to R 14 are each independently selected from a hydrogen, —C(═O)OH, a substituted or unsubstituted C 1 -C 10 alkyl group, and a substituted or unsubstituted C 1 -C 10 alkoxy group.

6. The polymer of claim 5 , wherein the polymer has a weight average molecular weight in a range of about 100,000 Daltons to about 3,000,000 Daltons.

7. The polymer of claim 1 , wherein the polymer comprises at least one of polymers represented by Formulae 5 to 8, and has a weight average molecular weight in a range of about 100,000 Daltons to about 3,000,000 Daltons:

wherein in Formula 5,
x and y each indicate a mole fraction, and 0<x <1, 0<y <1, provided that x+y =1;
M 1 is at least one selected from Li + , Na + , K + , and NH 4 + ; and
Q is at least one selected from an amide group substituted with R b and an ammonium carboxylate salt substituted with R b , wherein R b is a 3,4-dihydroxyphenyl group link

Assignees

• Samsung Electronics Co Ltd

Inventors

• Hwang Seungsik
• Choi Jaeman
• Chung Yeonji

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M4/483

  for non-aqueous cells (H01M4/485 takes precedence) · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title

• H01M4/386

  Silicon or alloys based on silicon · CPC title

• H01M4/622 Primary

  being polymers · CPC title