# US 2017/0288196 A1 · Biocompatible rechargable energization elements for biomedical devices with electroless sealing layers

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- Number: US 2017/0288196 A1
- Document ID: US20170288196A1
- Status: Published application
- Kind: A1
- Application number: 15/631,446
- Filed: 2017-06-23
- Published: 2017-10-05
- Earliest claimed: 2014-08-21
- Assignees: Johnson & Johnson Vision Care, Inc.
- Applicants: Johnson & Johnson Vision Care, Inc.
- Inventors: FREDERICK A. FLITSCH; Millburn Ebenezer Muthu; Randall B. Pugh; Adam Toner; Lawrence Edward Weinstein
- Web page: https://patentgrep.com/patent/US20170288196A1

## CPC

- H01M 10/0569: characterised by the solvents
- B29D 11/00048: {composed of parts with dissimilar composition (B29D11/00057 takes precedence)}
- B29D 11/00817: {Producing electro-active lenses or lenses with energy receptors, e.g. batteries or antennas}
- G02C 7/04: Contact lenses for the eyes (disinfection or sterilisation of contact lenses A61L12/00)
- G02C 7/083: {Electrooptic lenses}
- G02C 11/10: {Electronic devices other than hearing aids}
- H01M 4/0402: {Methods of deposition of the material}
- H01M 4/386: {Silicon or alloys based on silicon}
- H01M 4/42: Alloys based on zinc
- H01M 4/50: of manganese
- H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines}
- H01M 4/583: Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/587: for inserting or intercalating light metals
- H01M 4/622: {being polymers}
- H01M 4/625: {Carbon or graphite}
- H01M 6/12: with flat electrodes
- H01M 6/40: Printed batteries {, e.g. thin film batteries}
- H01M 10/0436: {Small-sized flat cells or batteries for portable equipment}
- H01M 10/0568: characterised by the solutes
- H01M 50/109: of button or coin shape
- H01M 50/119: Metals
- H01M 50/133: Thickness
- H01M 50/406: Moulding; Embossing; Cutting
- H01M 50/426: Fluorocarbon polymers
- H01M 50/463: Separators, membranes or diaphragms characterised by their shape
- H01M 4/24: Electrodes for alkaline accumulators
- H01M 6/04: Cells with aqueous electrolyte
- H01M 6/32: activated through external addition of electrolyte or of electrolyte components
- H01M 6/425: {Multimode batteries, batteries with "reserve cells"}
- 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 2004/028: {Positive electrodes}
- H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop
- H01M 2300/004: Three solvents
- 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)
- 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 embodiments, the methods and apparatus to form the biocompatible energization elements involve forming cavities comprising active cathode chemistry. The active elements of the cathode and anode are sealed with a laminate stack of biocompatible material. In some embodiments, a field of use for the methods and apparatus may include any biocompatible device or product that requires energization elements.

## Claims

### Claim 1

A biocompatible energization element comprising
a gap spacer layer;
a first hole located in the gap spacer layer;
a cathode spacer layer, wherein the cathode spacer layer is attached to the gap spacer layer;
a second hole located in the cathode spacer layer, wherein the second hole is aligned to the first hole, and wherein the second hole is smaller than the first hole such that when the first hole and the second hole are aligned there is a ridge of cathode spacer layer exposed in the first hole;
a separator layer, wherein the separator layer is placed within the first hole in the gap spacer layer and is adhered to the ridge of cathode spacer layer;
a cavity between sides of the second hole and a first surface of the separator layer, wherein the cavity is filled with cathode chemicals;
a first current collector coated with anode chemicals;
a second current collector, wherein the second current collector is in electrical connection with the cathode chemicals;
an electrolyte comprising electrolyte chemicals; and
a plated metallic exterior coating, wherein the plated metallic exterior coating comprises a portion that is plated with electroless plating, and wherein the thickness of the plated metallic exterior coating is thick enough to act as a barrier to ingress and egress of moisture from the biochemical energization element.

### Claim 2 (depends on 1)

The biocompatible energization element of claim 1 wherein the cathode chemicals, anode chemicals and electrolyte chemicals are consistent with multiple charging and discharging cycles of the energization element.

### Claim 3 (depends on 2)

The biocompatible energization element of claim 2 wherein the cathode chemicals comprise a salt of lithium.

### Claim 4 (depends on 3)

The biocompatible energization element of claim 3 wherein the cathode chemicals comprise lithium iron phosphate.

### Claim 5 (depends on 1)

The biocompatible energization element of claim 1 wherein the anode chemicals comprise intercalated metal atoms.

### Claim 6 (depends on 5)

The biocompatible energization element of claim 5 wherein the anode chemicals comprise intercalated lithium atoms.

### Claim 7 (depends on 1)

The biocompatible energization element of claim 1 wherein the plated metallic exterior coating comprises copper.

### Claim 8 (depends on 7)

The biocompatible energization element of claim 7 wherein the cathode chemicals comprise lithium iron phosphate.

### Claim 9 (depends on 1)

The biocompatible energization element of claim 1 wherein the cathode chemicals comprise sodium carboxymethyl cellulose.

### Claim 10 (depends on 1)

The biocompatible energization element of claim 1 wherein the cathode chemicals comprise one or more of synthetic graphite and carbon black.

### Claim 11 (depends on 1)

The biocompatible energization element of claim 1 wherein the cathode chemicals comprise one or more of styrene butadiene rubber.

### Claim 12 (depends on 1)

The biocompatible energization element of claim 1 wherein the electrolyte comprises lithium hexafluorophosphate.

### Claim 13 (depends on 1)

The biocompatible energization element of claim 1, wherein a blocking material prevents the plated metallic exterior coating from forming in the region of one or more of the anode contact and the cathode contact.

### Claim 14 (depends on 13)

The biocompatible energization element of claim 13 wherein the biomedical device is an ophthalmic device.

### Claim 15 (depends on 14)

The biocompatible energization element of claim 14 wherein the ophthalmic device is a contact lens.

### Claim 16

A biocompatible energization element comprising
a cathode spacer layer;
a first hole located in the cathode spacer layer;
a first current collector coated with anode chemicals, wherein the first current collector is attached to a first surface of the cathode spacer layer, and wherein a first cavity is created between sides of the first hole and a first surface of the first current collector coated with anode chemicals;
a separator layer, wherein the separator layer is formed within the first cavity after a separator precursor mixture is dispensed into the cavity;
a second cavity between sides of the first hole and a first surface of the separator layer, wherein the second cavity is filled with cathode chemicals;
a second current collector , wherein the second current collector is in electrical connection with the cathode chemicals;
an electrolyte comprising electrolyte chemicals; and
a plated metallic exterior coating, wherein the plated metallic exterior coating comprises a portion that is plated with electroless plating, and wherein the thickness of the plated metallic exterior coating is thick enough to act as a barrier to ingress and egress of moisture from the biochemical energization element, and wherein a blocking material prevents the plated metallic exterior coating from forming in the region of one or more of the anode contact and the cathode contact.

### Claim 17 (depends on 16)

The biocompatible energization element of claim 16 wherein the cathode chemicals, anode chemicals and electrolyte chemicals are consistent with multiple charging and discharging cycles of the energization element.

### Claim 18 (depends on 16)

The biocompatible energization element of claim 16 wherein the cathode chemicals comprise a salt of lithium.

### Claim 19 (depends on 18)

The biocompatible energization element of claim 18 wherein the cathode chemicals comprise lithium iron phosphate.

### Claim 20 (depends on 16)

The biocompatible energization element of claim 16 wherein the anode chemicals comprise intercalated metal atoms.

### Claim 21 (depends on 20)

The biocompatible energization element of claim 20 wherein the anode chemicals comprise intercalated lithium atoms.

### Claim 22 (depends on 16)

The biocompatible energization element of claim 16 wherein the cathode chemicals comprise one or more of lead, nickel, lithium, cobalt, zinc, sodium, vanadium, silver, or silicon.

### Claim 23 (depends on 16)

The biocompatible energization element of claim 16 wherein the cathode chemicals comprise sodium carboxymethyl cellulose.

### Claim 24 (depends on 16)

The biocompatible energization element of claim 16 wherein the cathode chemicals comprise one or more of synthetic graphite and carbon black.

### Claim 25 (depends on 16)

The biocompatible energization element of claim 16 wherein the cathode chemicals comprise one or more of styrene butadiene rubber.

### Claim 26 (depends on 16)

The biocompatible energization element of claim 16 wherein the electrolyte comprises lithium hexafluorophosphate.

### Claim 27 (depends on 26)

The biocompatible energization element of claim 26 wherein the separator precursor mixture comprises one or more of poly(vinylidene fluoride), poly(dimethylsiloxane), N-N Dimethyl Acetamide (DMAc) and glycerol.

### Claim 28 (depends on 27)

The biocompatible energization element of claim 27 wherein the separator comprises glycerol in a concentration at least 90% reduced from a concentration of glycerol in the separator precursor mixture.

### Claim 29 (depends on 16)

The biocompatible energization element of claim 16 wherein the biocompatible energization element is electrically connected to an electroactive element within a biomedical device.

### Claim 30 (depends on 29)

The biocompatible energization element of claim 29 wherein the biomedical device is an ophthalmic device.

### Claim 31 (depends on 30)

The biocompatible energization element of claim 30 wherein the ophthalmic device is a contact lens.