# US 12,009,479 B1 · Roll-to-roll formation method for solid electrolyte using metal colloidal particles

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- Number: US 12,009,479 B1
- Document ID: US12009479B1
- Status: Granted
- Kind: B1
- Application number: 18/558,539
- Filed: 2022-06-08
- Published: 2024-07-04
- Granted: 2024-06-11
- Earliest claimed: 2021-06-10
- Assignees: BEILab corp.
- Applicants: BEILab corp.
- Inventors: Jihyun Seo
- Web page: https://patentgrep.com/patent/US12009479B1

## CPC

- H01B 1/10: sulfides
- H01M 10/0562: Solid materials
- H01M 10/052: Li-accumulators
- H01M 2300/0068: inorganic
- H01M 2300/0094: in the form of layered products, e.g. coatings
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- 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

The present invention relates to a roll-to-roll formation method for a solid electrolyte using metal colloidal particles and, more specifically, to a roll-to-roll formation method for a solid electrolyte using metal colloidal particles, wherein the method enables design of a solid electrolyte material with a desired composition by means of direct coating of metal colloidal particles on a metal electrode foil, and enables formation of a void-free sulfide-based solid electrolyte material by sequentially inducing, on a solid electrolyte forming layer, a sulfurization reaction by a roll-to-roll method without a complicated powder processing process.

## Claims

### Claim 1

A roll-to-roll formation method of a solid electrolyte using metal colloidal particles, the roll-to-roll formation method comprising:
(a) directly coating a metal electrode foil with the metal colloidal particles to form a solid electrolyte layer; and
(b) supplying a sulfur source to the solid electrolyte layer formed in step (a) to induce sulfidation reaction, thereby forming a sulfide-based solid electrolyte layer.

### Claim 2 (depends on 1)

The roll-to-roll formation method according to claim 1, wherein the metal colloidal particles comprise at least one of copper (Cu), lithium (Li), germanium (Ge), phosphorus (P), silicon (Si), sodium (Na), molybdenum (Mo), lanthanum (La), or zirconium (Zr) single metal particles and alloy metal particles selected from a group consisting of combinations thereof.

### Claim 3 (depends on 1)

The roll-to-roll formation method according to claim 1, wherein
the sulfur source comprises at least one of hydrogen sulfide (H2S), sulfur gas (S vapor), and methyl mercaptan (CH3SH), and is supplied through continuous or pulse-like supply of gas.