# US 9,882,240 B2 · Graft copolymer, process for producing the graft copolymer, process for preparing a gel polymer electrolyte including the graft copolymer, and intermediate copolymer of the graft copolymer

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- Number: US 9,882,240 B2
- Document ID: US9882240B2
- Status: Granted
- Kind: B2
- Application number: 14/456,343
- Filed: 2014-08-11
- Published: 2016-02-11
- Granted: 2018-01-30
- Earliest claimed: 2014-08-11
- Assignees: National Cheng Kung University
- Applicants: National Cheng Kung University
- Inventors: Ping-Lin Kuo; Sheng-Shu Hou; Chung-Yu Lu; Ching-An Wu; Chih-Hao Tsao; Chun-Han Hsu
- Web page: https://patentgrep.com/patent/US9882240B2

## CPC

- H01M 10/0565: Polymeric materials, e.g. gel-type or solid-type
- B01J 41/13: obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
- C08F 283/065: {on to unsaturated polyethers, polyoxymethylenes or polyacetals}
- C08G 73/024: {Polyamines containing oxygen in the form of ether bonds in the main chain}
- H01M 4/622: {being polymers}
- H01M 10/052: Li-accumulators
- H01M 2300/0085: Immobilising or gelification of electrolyte
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A graft copolymer comprising a backbone polymer and a branched-chain polymer, and represented by formula (I), where A, B, Ra, Rb, Rc, Rd, Re, Rf, G1, G2, G3, G4, Y1, Y2, and k are as defined in the specification. A process for producing the grate copolymer, a process for preparing a gel polymer electrolyte including the graft copolymer, and an intermediate copolymer of the graft copolymer are also disclosed.

## Claims

### Claim 1

A graft copolymer comprising a backbone polymer and a branched-chain polymer, and represented by formula (I),
where:
A is represented by X1n and is independently of each repeating unit, in which n is an integral not less than zero, and X1 is represented by
and is independently of each repeating unit, in which
D1 is a carbon atom or a silicon atom,
R1 and R2 are independently —CH3, H, or F when D1 is a carbon atom, and are independently —CH3, -phenyl, —OCH3, or —OC2H, when D1 is a silicon atom, and
m is 1 or 2;
B is represented by
in which
D2 is a carbon atom or a silicon atom,
R3, R4, R5, R6, R7, and R are independently —CH3, H, or F when D2 is a carbon atom, and are independently —CH3, -phenyl, —OCH3, or —OC2H5 when D2 is a silicon atom,
p is 1 or 2,
q is an integral not less than 1,
Z1 is
in which R15 and R16 are independent for each repeating unit, R15, R16, and R17 are independently H or alkyl, and r, s, and t are each an integral not less than 1, and
Z2 is
in which R18 and R19 are independent for each repeating unit, R18, R19, and R20 are independently H or alkyl, and u, v, and w are each an integral not less than 1;
Ra, Rb, Rc, Rd, Re, and Rf are independently H or alkyl;
k is an integral not less than 1; and
G1, G2, G3, and G4 are independent for each repeating unit, and G1, G2, G3, G4, Y1, and Y2 are independently H, alkyl, or a polymer chain selected from the group consisting of polyacrylonitrile and a derivative thereof, polyvinylsulfonic acid and a derivative thereof, polyacrylate and a derivative thereof, and polyvinylphosphonic acid and a derivative thereof.

### Claim 2 (depends on 1)

The graft copolymer according to claim 1, wherein A is represented by
where x, y, and z are each an integral not less than zero.

### Claim 3 (depends on 1)

The graft copolymer according to claim 1, wherein B is represented by

### Claim 4 (depends on 1)

The graft copolymer according to claim 1, wherein at least one of G1, G2, G3, and G4, in at least one of the repeating units is the polymer chain.

### Claim 5 (depends on 1)

The graft copolymer according to claim 1, wherein the polymer chain is polyacrylonitrile.

### Claim 6 (depends on 1)

The graft copolymer according to claim 1, wherein Ra and Re are each a methyl group, and Rb, Rc, Rd, and Rf are each hydrogen atom.

### Claim 7 (depends on 1)

A process for preparing a gel polymer electrolyte,
comprising a step of soaking the graft copolymer as claimed in claim 1 with a lithium ion containing electrolyte.

### Claim 8 (depends on 7)

The process according to claim 7, wherein the lithium ion containing electrolyte includes lithium hexafluorophosphate.