# US 2019/0379048 A1 · Slurry composition for non-aqueous secondary battery functional layers, non-aqueous secondary battery functional layer, and non-aqueous secondary battery

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- Number: US 2019/0379048 A1
- Document ID: US20190379048A1
- Status: Published application
- Kind: A1
- Application number: 16/487,565
- Filed: 2018-03-08
- Published: 2019-12-12
- Earliest claimed: 2017-03-13
- Assignees: Zeon Corporation
- Applicants: Zeon Corporation
- Inventors: Yujiro TOYODA
- Web page: https://patentgrep.com/patent/US20190379048A1

## CPC

- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- C08K 3/013: Fillers, pigments or reinforcing additives
- C08L 1/286: {substituted with acid radicals, e.g. carboxymethyl cellulose [CMC] (C08L1/282 takes precedence)}
- H01G 11/06: with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
- H01G 11/52: Separators
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M 4/366: {as layered products}
- H01M 4/622: {being polymers}
- C08K 3/22: of metals
- C08K 2201/001: Conductive additives
- C08L 1/08: Cellulose derivatives
- C08L 33/08: Homopolymers or copolymers of acrylic acid esters
- C08L 2203/20: use in electrical or conductive gadgets
- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 50/403: Manufacturing processes of separators, membranes or diaphragms
- H01M 50/417: Polyolefins
- H01M 50/449: having a layered structure
- H01M 50/489: Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A slurry composition for non-aqueous secondary battery functional layers contains non-conductive particles, a water-soluble polymer having an average degree of polymerization of 50 or more and 450 or less, a binder, and water.

## Claims

### Claim 1

A slurry composition for functional layers comprising:
non-conductive particles;
a water-soluble polymer;
a binder; and
water,
wherein the water-soluble polymer has an average degree of polymerization of 50 or more and 450 or less.

### Claim 2 (depends on 1)

The slurry composition for non-aqueous secondary battery functional layers of claim 1, wherein the water-soluble polymer is a cellulosic derivative.

### Claim 3 (depends on 1)

The slurry composition for non-aqueous secondary battery functional layers of claim 1, wherein the water-soluble polymer is carboxymethyl cellulose or a salt of carboxymethyl cellulose.

### Claim 4 (depends on 2)

The slurry composition for non-aqueous secondary battery functional layers of claim 2, wherein the water-soluble polymer has a degree of etherification of 0.6 or more.

### Claim 5 (depends on 1)

The slurry composition for non-aqueous secondary battery functional layers of claim 1, wherein a content of the water-soluble polymer is 0.2 parts by mass or more and 4.5 parts by mass or less per 100 parts by mass of the non-conductive particles.

### Claim 6 (depends on 1)

The slurry composition for non-aqueous secondary battery functional layers of claim 1, further comprising a wetting agent,
wherein a content of the wetting agent is 0.01 parts by mass or more and 2.0 parts by mass or less per 100 parts by mass of the non-conductive particles.

### Claim 7 (depends on 6)

The slurry composition for non-aqueous secondary battery functional layers of claim 6, wherein a mass ratio of the content of the wetting agent to the content of the water-soluble polymer is 0.05 or more and 1.0 or less.

### Claim 8 (depends on 1)

A non-aqueous secondary battery functional layer formed using the slurry composition for non-aqueous secondary battery functional layers of claim 1.

### Claim 9 (depends on 8)

The non-aqueous secondary battery functional layer of claim 8, having a thickness of 5.0 μm or less.

### Claim 10 (depends on 8)

A non-aqueous secondary battery comprising:
the non-aqueous secondary battery functional layer according to claim 8.