# US 2021/0280850 A1 · Inserted Cavity Electrode Lithium Battery

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- Number: US 2021/0280850 A1
- Document ID: US20210280850A1
- Status: Published application
- Kind: A1
- Application number: 17/194,176
- Filed: 2021-03-05
- Published: 2021-09-09
- Earliest claimed: 2020-03-07
- Inventors: Slobodan Petrovic
- Web page: https://patentgrep.com/patent/US20210280850A1

## CPC

- H01M 4/137: Electrodes based on electro-active polymers
- H01M 4/382: {Lithium (H01M4/405 takes precedence)}
- H01M 4/661: {Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence)}
- H01M 4/76: Containers for holding the active material, e.g. tubes, capsules
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/056: characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M 10/653: characterised by electrically insulating or thermally conductive materials
- H01M 10/6567: Liquids
- H01M 2004/024: {Insertable electrodes}
- 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
- 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

A battery with many cavities that form tiny reaction zones having voids. During charging, lithium metal forms in each cavity on the anode current collector. The formation of lithium metal in each of the many thousands of small cavities that are isolated from each other prevents the buildup of significant quantities of lithium metal in one location. The combination of tiny reaction zones and voids allows lithium metal to form without stressing the structure of the battery cell.

## Claims

### Claim 1

A battery comprising:
a non-conductive polymer base material;
said base material having cavities;
an anode current collector layer on said base material;
a layer of anode liquid electrolyte on said anode current collector layer;
a layer of solid electrolyte on said layer of anode liquid electrolyte;
a cathode active mass layer; and
a cathode current collector.

### Claim 2 (depends on 1)

The battery of claim 1 further comprising:
some of said cavities are punctured.

### Claim 3 (depends on 1)

The battery of claim 1 further comprising:
a void between the said anode liquid electrolyte and said solid electrolyte.

### Claim 4 (depends on 1)

The battery of claim 1 further comprising:
each said cavity having a lip;
a layer of insulating material on said anode current collector at the said lip of each said cavity.

### Claim 5 (depends on 1)

The battery of claim 1 further comprising:
a layer of cathode liquid electrolyte between said solid electrolyte and said cathode active mass.

### Claim 6 (depends on 1)

The battery of claim 1 further comprising:
a top non-conductive polymer layer.

### Claim 7 (depends on 6)

The battery of claim 6 further comprising:
a heat conducting liquid between said cathode current collector and said top non-conductive polymer layer.

### Claim 8

A battery comprising:
an array of cavities formed in a continuous non-conductive polymer material;
each said cavity is 1 to 50 microns wide;
a concave-shaped anode in each of said cavities; and
a convex shaped cathode inserted into each of said cavities.

### Claim 9 (depends on 8)

The battery of claim 8 further comprising:
some of said cavities are punctured.

### Claim 10 (depends on 8)

The battery of claim 8 further comprising:
a layer of anode liquid electrolyte;
a layer of solid electrolyte; and
a void between the said anode liquid electrolyte and said solid electrolyte.

### Claim 11 (depends on 8)

The battery of claim 8 further comprising:
each said cavity having a lip;
each said cavity having an anode current collector;
a layer of insulating material on said anode current collector at the said lip of each said cavity.

### Claim 12 (depends on 8)

The battery of claim 8 further comprising:
the convex shaped cathode having a cathode active mass; and
a top non-conductive polymer layer.

### Claim 13

The battery comprising:
a non-conductive polymer base material;
said base material having cavities;
an anode current collector layer on said base material;
a layer of lithium metal on said anode current collector;
a layer of anode liquid electrolyte;
a layer of solid electrolyte deposited on said layer of anode liquid electrolyte;
a cathode active mass layer; and
a cathode current collector.

### Claim 14 (depends on 13)

The battery of claim 13 further comprising:
some of said cavities are punctured.

### Claim 15 (depends on 13)

The battery of claim 13 further comprising:
each said cavity having a lip;
a layer of insulating material on said anode current collector at the said lip of each said cavity.

### Claim 16 (depends on 13)

The battery of claim 13 further comprising:
a top non-conductive polymer layer.