Energy storage device

Patent metadata

Field	Value
Publication number	US-11271254-B2
Application number	US-201916540179-A
Country	US
Kind code	B2
Filing date	Aug 14, 2019
Priority date	Apr 25, 2019
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

An energy storage device includes an anode, a cathode, and a separator disposed between the anode and the cathode. At least one of the anode, cathode and separator includes a copolymer functioning as a non-aqueous adhesive and/or solid-state electrolyte for the energy storage device. The copolymer is a copolymer or a derivative thereof, which is produced by polymerization of monomers containing conductive ion group and/or olefinic monomers in the presence of 2-propenenitrile. Therefore, the energy storage device which the copolymer is used therein has excellent charging and discharging performance to therefore effectively enhance the efficiency and extend the service life of the energy storage device.

First claim

What is claimed is:

1. An energy storage device, comprising:
an anode and a cathode; and
a separator disposed between the anode and the cathode;
wherein at least one of the anode, cathode, and separator comprises a copolymer, the copolymer has a structure expressed by the formula below,

wherein,
R′ is —CH 3 , —H,

 Li, —NH 2 or —N(CH 3 ) 2 ,
G III is derived from monomers which contains a reactive group, wherein R 3 includes one selected from the group consisting of hydroxy group, epoxy group, isocyanate group, amino group, and a combination thereof,
G IV is derived from olefinic monomers, wherein R 4 includes one selected from the group consisting of C 1 ˜C 30 saturated or unsaturated alkyl group, phenyl group, benzyl group, and a combination thereof;
wherein R 1 is H or CH 3 ;
wherein the number of repeat units of the copolymer meets the following criteria:

a

a
+
b
+
c
+
d

>
0

,

b

a
+
b
+
c
+
d

>
0

,

c

a
+
b
+
c
+
d

≥
0

,

d

a
+
b
+
c
+
d

≥

0
.

2. The energy storage device of claim 1 , wherein the cocpolymer further reacts with polyether amine, taurine, polyether diamine, imidazole, 1,3-propanesultone or a derivative thereof so as to be modified or cross-linked.

3. The energy storage device of claim 1 , wherein the anode comprises the copolymer in an amount of 0.01˜30% by weight, and contains active substances and electrically conductive carbon, wherein the copolymer is used alone or doped with any polymer to function as an anode adhesive.

4. The energy storage device of claim 1 , wherein the cathode comprises the copolymer in an amount of 0.01˜30% by weight, wherein copolymer is used alone or doped with any polymer to function as a cathode adhesive.

5. The energy storage device of claim 1 , wherein the separator comprises the copolymer in an amount of 0.01˜30% by weight, and the separator is formed by coating a paste or formula.

6. The energy storage device of claim 1 , wherein the solid-state electrolyte comprises the copolymer in an amount of 0.1˜90% by weight.

Assignees

• Univ Nat Cheng Kung
• Rising Chemical Co Ltd
• Polybatt Mat Co Ltd

Inventors

• Kuo Ping-Lin
• Tsao Chih-Hao
• Chin Chia-Wei

Classifications

• H01M50/414

  Synthetic resins, e.g. thermoplastics or thermosetting resins · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/622 Primary

  being polymers · CPC title

• H01M10/0525

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

• H01G11/38

  Carbon pastes or blends; Binders or additives therein · CPC title