# US 2013/0157146 A1 · Solid electrolyte and lithium based battery using the same

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- Number: US 2013/0157146 A1
- Document ID: US20130157146A1
- Status: Published application
- Kind: A1
- Application number: 13/652,807
- Filed: 2012-10-16
- Published: 2013-06-20
- Earliest claimed: 2011-12-17
- Assignees: Tsinghua University; Hon Hai Precision Industry Co., Ltd.
- Inventors: LI WANG; XIANG-MING HE; JIAN-JUN LI; JIAN GAO; CHANG-YIN JIANG
- Web page: https://patentgrep.com/patent/US20130157146A1

## CPC

- C08F 2/48: by ultraviolet or visible light
- C08F 222/102: {of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate}
- H01M 10/0565: Polymeric materials, e.g. gel-type or solid-type
- C08F 220/286: {and containing polyethylene oxide in the alcohol moiety, e.g. methoxy polyethylene glycol (meth)acrylate}
- H01M 10/052: Li-accumulators
- H01M 2300/0082: Organic polymers
- Y02E 60/10: Energy storage using batteries
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A solid electrolyte includes an interpenetrating polymer network and a lithium salt dispersed in the interpenetrating polymer network. The interpenetrating polymer network includes CH2—CH2OH segments, and is formed by polymerizing a first monomer R1—OCH2—CH2—OHR2, a second monomer R3—OCH2—CH2—OmR4 and an initiator. Each “R1”, “R2” and “R3” includes —C═C— group or —C≡C— group. The “R4” includes an alkyl group or a hydrogen atom. The “m” and “n” are integer. Molecular weights of the first monomer and the second monomer are more than or equal to 100, and less than or equal to 800. The first monomer is less than or equal to 50% of the second monomer by weight. The lithium salt is less than or equal to 10% the second monomer by weight. A lithium based battery using the solid electrolyte is also provided.

## Claims

### Claim 1

A solid electrolyte, comprising:
an interpenetrating polymer network comprising CH2—CH2—On segments, the interpenetrating polymer network substantially formed by polymerizing a first monomer R1—OCH2—CH2—OnR2, a second monomer R3—OCH2—CH2—OmR4 and an initiator; and
a lithium salt dispersed in the interpenetrating polymer network,
wherein each “R1”, “R2” and “R3” comprises —C═C— group or —C≡C— group; the “R4” comprises an alkyl group or a hydrogen atom; the “m” and “n” are integers; molecular weights of the first monomer or the second monomer are more than or equal to 100 and less than or equal to 800; the first monomer is less than or equal to 50% of the second monomer by weight; and the lithium salt is less than or equal to 10% of the second monomer by weight.

### Claim 2 (depends on 1)

The solid electrolyte of claim 1, wherein a molecular structure of the interpenetrating polymer network comprises an open circle structure.

### Claim 3 (depends on 1)

The solid electrolyte of claim 1, wherein each “R1”, “R2” and “R3” comprises unsaturated chain hydrocarbon groups or unsaturated chain hydrocarbon groups with carbonyl.

### Claim 4 (depends on 3)

The solid electrolyte of claim 3, wherein each “R1”, “R2” and “R3” comprises ethenyl (—CH═CH2), ethynyl (—C≡CH), allyl (—CH═CH—CH3, or —(CH3)C═CH2), propinyl (—C≡C—CH3), or ethenyl ketonic group

### Claim 5 (depends on 1)

The solid electrolyte of claim 1, wherein both the molecular weight of the first monomer and the molecular weight of the second monomer are more than or equal to 200 and less than or equal to 600.

### Claim 6 (depends on 1)

The solid electrolyte of claim 1, wherein the lithium salt is selected from a group consisting of lithium perchlorate, lithium hexafluoro-phosphate, lithium tetrafluoro-borate, lithium bis(oxalate)-borate, lithium manganate, lithium iron phosphate, lithium nickelate, lithium cobalt oxide, and combinations thereof.

### Claim 7 (depends on 1)

The solid electrolyte of claim 1, wherein the initiator is a photo-initiator selected from a group consisting of 1-hydroxy-cyclohexyl phenyl ketone, 2-methyl-1-[4-(methylthio)-phenyl]-2-morpholino-propiopheno, and dimethylol propionic acid.

### Claim 8 (depends on 1)

The solid electrolyte of claim 1, wherein the initiator is a thermo-initiator selected from a group consisting of chloride gas, bromine gas, organic peroxide, and azo initiator.

### Claim 9 (depends on 1)

The solid electrolyte of claim 1, wherein the first monomer is polyethyleneglycol (200) dimethacrylate, and the second monomer is methoxy polyethylene glycol (350) monoacrylate.

### Claim 10 (depends on 9)

The solid electrolyte of claim 9, wherein the lithium salt is lithium perchlorate.

### Claim 11 (depends on 10)

The solid electrolyte of claim 10, wherein the initiator is dimethylol propionic acid.

### Claim 12 (depends on 11)

The solid electrolyte of claim 11, wherein the polyethyleneglycol (200) dimethacrylate is about 2.5% by weight of the methoxy polyethylene glycol (350) monoacrylate.

### Claim 13 (depends on 12)

The solid electrolyte of claim 12, wherein the lithium perchlorate is about 5% of the methoxy polyethylene glycol (350) monoacrylate by weight.

### Claim 14 (depends on 13)

The solid electrolyte of claim 13, wherein the dimethylol propionic acid is about 0.1% by weight of the methoxy polyethylene glycol (350) monoacrylate.

### Claim 15

A lithium based battery, comprising:
an anode,
a cathode; and
a solid electrolyte attached between the anode and the cathode, and the solid electrolyte comprising:
an interpenetrating polymer network comprising CH2—CH2—n segments, and the interpenetrating polymer network formed by polymerizing a first monomer R1—OCH2—CH2—OnR2, a second monomer R3—OCH2—CH2—OmR4 and an initiator; and
a lithium salt dispersed in the interpenetrating polymer network,
wherein, each “R1”, “R2” and “R3” comprises —C═C— group or —C≡C— group; the “R4” comprises an alkyl group or a hydrogen atom; the “m” and “n” are integers; molecular weights of the first monomer and the second monomer are more than or equal to 100, and less than or equal to 800; the first monomer is less than or equal to 50% of the second monomer by weight; the lithium salt is less than or equal to 10% of the second monomer by weight.

### Claim 16 (depends on 15)

The lithium based battery of claim 15, wherein each “R1”, “R2” and “R3” comprises unsaturated chain hydrocarbon groups or unsaturated chain hydrocarbon groups with carbonyl.

### Claim 17 (depends on 15)

The lithium based battery of claim 15, wherein each “R1”, “R2” and “R3” comprises ethenyl, ethynyl, allyl, propinyl, or ethenyl ketonic group.

### Claim 18 (depends on 15)

The lithium based battery of claim 15, wherein the first monomer is polyethyleneglycol (200) dimethacrylate, the second monomer is methoxy polyethylene glycol (350) monoacrylate, the lithium salt is lithium perchlorate, and the initiator is dimethylol propionic acid.

### Claim 19 (depends on 18)

The lithium based battery of claim 18, wherein the polyethyleneglycol (200) dimethacrylate is about 2.5% by weight of the methoxy polyethylene glycol (350) monoacrylate.

### Claim 20 (depends on 19)

The lithium based battery of claim 19, wherein the lithium perchlorate is about 5% by weight of the methoxy polyethylene glycol (350) monoacrylate.