# US 10,374,216 B2 · Pellet form cathode for use in a biocompatible battery

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- Number: US 10,374,216 B2
- Document ID: US10374216B2
- Status: Granted
- Kind: B2
- Application number: 15/680,540
- Filed: 2017-08-18
- Published: 2017-12-07
- Granted: 2019-08-06
- Earliest claimed: 2014-08-21
- Assignees: Johnson & Johnson Vision Care, Inc.
- Applicants: Johnson & Johnson Vision Care, Inc.
- Inventors: Frederick A. Flitsch; Daniel B. Otts; Randall B. Pugh; James Daniel Riall; Adam Toner
- Web page: https://patentgrep.com/patent/US10374216B2

## CPC

- H01M 4/0404: {by coating on electrode collectors}
- B29D 11/00038: {Production of contact lenses}
- B29D 11/00817: {Producing electro-active lenses or lenses with energy receptors, e.g. batteries or antennas}
- H01M 4/0473: {Filling tube-or pockets type electrodes; Applying active mass in cup-shaped terminals}
- H01M 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence)
- H01M 4/583: Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 10/0436: {Small-sized flat cells or batteries for portable equipment}
- A61B 2017/00734: {battery operated}
- A61B 2560/0214: of power generation or supply
- A61M 2205/8206: battery-operated
- B29L 2011/0041: {Contact lenses}
- G02C 7/04: Contact lenses for the eyes (disinfection or sterilisation of contact lenses A61L12/00)
- G02C 7/083: {Electrooptic lenses}
- G02C 2202/16: Laminated or compound lenses
- H01M 4/0409: {by a doctor blade method, slip-casting or roller coating}
- H01M 4/0411: {by extrusion}
- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- H01M 2004/028: {Positive electrodes}
- H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00)
- 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

Methods and apparatus to form biocompatible energization elements are described. In some examples, the methods and apparatus to form the biocompatible energization elements involve forming pellets comprising active cathode chemistry. The active elements of the cathode and anode are sealed with a biocompatible material. In some examples, a field of use for the methods and apparatus may include any biocompatible device or product that requires energization elements.

## Claims

### Claim 1

A method of forming a biocompatible energization element, the method comprising:
receiving a first substrate film of a first insulating material;
cutting a cavity in the first substrate film to form a cathode spacer layer, wherein an edge of the cavity defines a sidewall of the cavity;
receiving an anode film;
adhering a first surface of the cathode spacer layer to a first surface of the anode film;
depositing a separator into the biocompatible energization element through the cavity in the cathode spacer layer, wherein a material deposited as the separator comprises a polymerizable material;
receiving a cathode pellet; and
placing the cathode pellet into the cavity in the cathode spacer layer, wherein the sidewall of the cavity in the cathode spacer layer and a surface of the separator contain the cathode pellet.

### Claim 2 (depends on 1)

The method of claim 1 further comprising
forming the cathode pellet from a cathode slurry.

### Claim 3 (depends on 2)

The method of claim 2 wherein the forming of the cathode pellet involves shaping the cathode slurry by squeegee processing of the cathode slurry onto a masking layer comprising holes shaped as to form pellets, and wherein the masking layer is positioned upon a substrate.

### Claim 4 (depends on 3)

The method of claim 3 wherein the substrate comprises a cathode current collector.

### Claim 5 (depends on 4)

The method of claim 4 further comprising annealing the pellet and the substrate.

### Claim 6 (depends on 5)

The method of claim 5 wherein the annealing is performed at a temperature approximately between 25 and 200 degrees Celsius.

### Claim 7 (depends on 5)

The method of claim 5 wherein the annealing is performed at a temperature approximately between 25 and 600 degrees Celsius.

### Claim 8 (depends on 5)

The method of claim 5 further comprising connecting the biocompatible energization element to an electroactive element within a biomedical device.

### Claim 9 (depends on 8)

The method of claim 8 wherein the biomedical device is a contact lens.

### Claim 10 (depends on 2)

The method of claim 2 wherein the forming the cathode pellet involves extruding slurry into pellet shaped deposits onto a substrate.

### Claim 11 (depends on 10)

The method of claim 10 wherein the substrate comprises a cathode current collector.

### Claim 12 (depends on 11)

The method of claim 11 further comprising annealing the pellet and the substrate.

### Claim 13 (depends on 12)

The method of claim 12 further comprising connecting the biocompatible energization element to an electroactive element within a biomedical device.

### Claim 14 (depends on 13)

The method of claim 13 wherein the biomedical device is a contact lens.

### Claim 15 (depends on 2)

The method of claim 2 wherein the cathode pellet is received unconnected to any substrate.

### Claim 16 (depends on 15)

The method of claim 15 further comprising adding a cathode current collector layer to a second surface of the cathode spacer layer, wherein the cathode current collector layer contacts a surface of the cathode pellet that has been placed into the cavity.

### Claim 17 (depends on 16)

The method of claim 16 further comprising connecting the biocompatible energization element to an electroactive element within a biomedical device.

### Claim 18 (depends on 17)

The method of claim 17 wherein the biomedical device is a contact lens.

### Claim 19 (depends on 2)

The method of claim 2 further comprising:
forming a layer of cathode chemicals by spreading the cathode slurry upon a substrate;
drying the layer of cathode chemicals; and
cutting pellets from the layer of cathode chemicals with a knife edge press.

### Claim 20 (depends on 19)

The method of claim 19 further comprising:
Sintering the layer of cathode chemicals upon a substrate.

### Claim 21 (depends on 19)

The method of claim 19 wherein the cutting cuts the cathode chemicals and an underlying cathode current collector into the pellet.

### Claim 22 (depends on 21)

The method of claim 21 further comprising sintering the pellet.

### Claim 23 (depends on 19)

The method of claim 19 further comprising connecting the biocompatible energization element to an electroactive element within a biomedical device.

### Claim 24 (depends on 23)

The method of claim 23 wherein the biomedical device is a contact lens.