# US 2021/0280849 A1 · Porous Polymer Lithium Anode

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2021/0280849 A1
- Document ID: US20210280849A1
- Status: Published application
- Kind: A1
- Application number: 16/812,291
- Filed: 2020-03-07
- Published: 2021-09-09
- Earliest claimed: 2020-03-07
- Inventors: Slobodan Petrovic
- Web page: https://patentgrep.com/patent/US20210280849A1

## CPC

- H01M 4/668: {Composites of electroconductive material and synthetic resins}
- H01M 4/137: Electrodes based on electro-active polymers
- H01M 4/602: {Polymers}
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 4/628: {Inhibitors, e.g. gassing inhibitors, corrosion inhibitors}
- H01M 10/052: Li-accumulators
- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/027: {Negative 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 using porous polymer materials with tapered or cone-shaped metalized pores. The types of batteries include, but are not limited to, Li—CoO2, Li—Mn2O4, Li—FePO4, Li—S, Li—O2, and other lithium cathode chemistries. The tapered metalized pores contain lithium metal in small reaction zones in the anode and cathode in a flexible structure. The form factor of such assembly would be very thin. Because of the thin form factor these electrodes would be suitable for batteries that require high power density, such certain electrical vehicles, power tools, and wearable devices.

## Claims

### Claim 1

An anode comprising:
a porous polymer anode base material having a cathode facing surface, an anode backside surface, and pores with internal anode pore walls; and
a coating of conductive material on said anode backside surface, and on said internal anode pore walls;
a passivation layer on the said cathode facing surface;
said internal anode pore walls have a proximate end, proximal to the cathode facing surface and a distal end, proximal to the anode backside surface;
the said coating of conductive material applied to the internal anode pore walls is tapered to be thicker at the said distal end than the proximate end.

### Claim 2 (depends on 1)

The anode of claim 1 further comprising:
said coating of conductive material at said distal end fills the distal end to block the opening in the distal end of the pore.

### Claim 3 (depends on 1)

The anode of claim 1 further comprising:
the coating applied to the internal anode pore walls is tapered sufficiently such that lithium metal formation at the said proximate end of said pores will not block the entrance of lithium ions into the pore before the pore is filled with lithium metal.

### Claim 4 (depends on 1)

The anode of claim 1 further comprising:
the coating applied to the internal anode pore walls is tapered sufficiently such that lithium preferentially plates on said distal end.

### Claim 5 (depends on 1)

The anode of claim 1 further comprising:
said porous polymer anode base material has structured pores.

### Claim 6

An anode comprising:
a porous polymer anode base material having a cathode facing surface and tapered metalized pores; and
a passivation layer on the said cathode facing surface.

### Claim 7 (depends on 6)

The anode of claim 6 further comprising:
the said tapered metalized pores are tapered sufficiently such that lithium metal formation at the said proximate end of said pores will not block the entrance of lithium ions into the pore before the pore is filled with lithium metal.

### Claim 8 (depends on 6)

The anode of claim 6 further comprising:
said porous polymer anode base material has structured pores.

### Claim 9

An anode comprising:
a porous polymer anode base material having a cathode facing surface and tapered metalized pores;
a passivation layer on said cathode facing surface; and
a wire mesh support for said porous polymer base material.

### Claim 10 (depends on 9)

The anode of claim 9 further comprising:
said tapered metalized pores are closed at one end.

### Claim 11 (depends on 9)

The anode of claim 9 further comprising:
said tapered metalized pores are tapered sufficiently such that lithium metal formation will not block the entrance of lithium ions into the said tapered metalized pores.

### Claim 12 (depends on 9)

The anode of claim 9 further comprising:
said tapered metalized pores are tapered sufficiently such that lithium preferentially plates at the bottom of the pore.