# US 9,752,063 B2 · Treatment and adhesive for microporous membranes

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- Number: US 9,752,063 B2
- Document ID: US9752063B2
- Status: Granted
- Kind: B2
- Application number: 15/018,795
- Filed: 2016-02-08
- Published: 2016-06-02
- Granted: 2017-09-05
- Earliest claimed: 2009-05-20
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Kirby W Beard
- Web page: https://patentgrep.com/patent/US9752063B2

## CPC

- C09J 127/16: Homopolymers or copolymers of vinylidene fluoride
- B32B 5/18: characterised by features of a layer {of} foamed material
- B32B 7/14: applied in spaced arrangements, e.g. in stripes
- B32B 15/082: comprising vinyl resins; comprising acrylic resins
- B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)}
- B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF}
- H01G 9/02: Diaphragms; Separators
- H01G 11/52: Separators
- H01G 11/82: Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
- H01G 11/84: Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01M 10/058: Construction or manufacture
- H01M 50/426: Fluorocarbon polymers
- H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes
- B32B 2250/42: Alternating layers, e.g. ABAB(C), AABBAABB(C)
- B32B 2307/50: having particular mechanical properties
- B32B 2457/10: Batteries
- B32B 2457/16: Capacitors
- H01M 10/052: Li-accumulators
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0565: Polymeric materials, e.g. gel-type or solid-type
- H01M 10/06: Lead-acid accumulators (semi-lead accumulators H01M10/20)
- H01M 50/461: {with adhesive layers between electrodes and separators}
- 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
- H01M 50/491: Porosity
- Y02E 60/10: Energy storage using batteries
- Y02E 60/13: Energy storage using capacitors
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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)
- 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
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

An electrochemical cell may have a PVDF microporous membrane that may be adhesively bonded to electrodes. The adhesive may be a mixture of a solvent and non-solvent that may cause the PVDF membrane to become tacky and adhere to an electrode without collapsing. An adhesively bonded cell may be constructed using multiple layers of adhesively bonded membranes and electrodes. In some embodiments, the adhesive solution may be used as a sizing to prepare electrodes for bonding.

## Claims

### Claim 1

An adhesive for bonding a microporous PVDF membrane, said adhesive comprising:
PVDF polymer dissolved in a solvent, said solvent being acetone and having a first surface energy; and
a non-solvent comprising a first liquid non-solvent and a second liquid non-solvent;
wherein the first liquid non-solvent having a second surface energy that is lower than said first surface energy, and the second liquid non-solvent having a surface energy that is different from said second surface energy, and
wherein said solvent being included in an amount of greater than or equal to about 78.875 weight percent, said first liquid non-solvent having a second surface energy that is lower than said first surface energy being included in an amount of greater than or equal to about 12.5 weight percent, said second liquid non-solvent having a surface energy that is different from said second surface energy being included in an amount of greater than or equal to about 0.875 weight percent, and said PVDF polymer being included in an amount of at least 2 weight percent, based on the total content of the adhesive.

### Claim 2 (depends on 1)

The adhesive of claim 1, wherein said second liquid non-solvent is water.

### Claim 3 (depends on 1)

The adhesive of claim 1, wherein said first liquid non-solvent is isopropanol.

### Claim 4 (depends on 1)

The adhesive of claim 1, wherein the PVDF polymer being included in an amount of up to 10 weight percent based on the total content of the adhesive.

### Claim 5 (depends on 1)

The adhesive of claim 1, wherein the PVDF polymer being included in an amount of up to 6 weight percent based on the total content of the adhesive.