# US 12,009,478 B1 · Solid state electrolyte

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- Number: US 12,009,478 B1
- Document ID: US12009478B1
- Status: Granted
- Kind: B1
- Application number: 18/358,865
- Filed: 2023-07-25
- Granted: 2024-06-11
- Earliest claimed: 2023-07-25
- Assignees: Rivian IP Holdings, LLC
- Applicants: Rivian IP Holdings, LLC
- Inventors: Rubayyat Mahbub; Chen Chen; Hui Dong; Sonika Rajput; Thomas Andrew Wynn; Forrest Stephen Gittleson; Shyam Dwaraknath
- Web page: https://patentgrep.com/patent/US12009478B1

## CPC

- H01M 10/0562: Solid materials
- H01M 4/0404: {by coating on electrode collectors}
- 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 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines}
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 10/052: Li-accumulators
- H01M 2004/027: {Negative electrodes}
- H01M 2004/028: {Positive electrodes}
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- H01M 2300/0068: inorganic
- H01M 2300/008: Halides
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

## Abstract

Aspects of the disclosure relate to solid state electrolytes which include a composition of Li6PS5Cl having a dopant substituted, in part, for phosphorus (P-site dopant) and an excess molar amount of Cl (i.e., doped, off-stoichiometric compositions). The P-site dopant can be selected among Groups 4, 5, 14, or 15 of the periodic table of elements and has an ionic radius greater than phosphorus (P). Such solid state electrolytes can be used in all solid-state batteries and configured for use in electric vehicles.

## Claims

### Claim 1

A solid-state electrolyte, comprising a composition of:
Li5.5P0.75Bi0.25S4.5Cl1.5, Li5.5P0.5Si0.5S4Cl2, Li5.75P0.75Si0.25S4.5Cl1.5, or a combination thereof.

### Claim 2

A battery cell, comprising:
a solid-state electrolyte comprising
a composition of Li5.5P0.75Bi0.25S4.5Cl1.5, Li5.5P0.5Si0.5S4Cl2, Li5.75P0.75Si0.25S4.5Cl1.5, or a combination thereof.

### Claim 3 (depends on 2)

The battery cell of claim 2, further comprising a positive electrode that comprises a cathode active material including a lithium metal oxide, a lithium metal phosphate, or a combination thereof.

### Claim 4 (depends on 2)

The battery cell of claim 2, further comprising a negative electrode that comprises an anode active material including lithium metal, a lithium metal alloy, a metal oxide, silicon, a silicon-based material, a carbonaceous material, or a combination thereof.

### Claim 5 (depends on 2)

The battery cell of claim 2, further comprising a negative electrode that comprises a current collector and lithium metal formed thereon in-situ.

### Claim 6 (depends on 2)

The battery cell of claim 2,
further comprising a positive electrode that comprises a cathode active material including a lithium metal oxide, a lithium metal phosphate, or a combination thereof; and a negative electrode that comprises an anode active material including lithium metal, a lithium metal alloy, or a combination thereof.

### Claim 7 (depends on 2)

The battery cell of claim 2, further comprising a positive electrode that comprises a cathode active material including a lithium metal phosphate; and a negative electrode that comprises an anode active material including lithium metal, a lithium metal alloy, or a combination thereof.

### Claim 8

A vehicle comprising a battery cell that comprises a solid-state electrolyte comprising a composition of Li5.5P0.75Bi0.25S4.5Cl1.5, Li5.5P0.5Si0.5S4Cl2, Li5.75P0.75Si0.25S4.5Cl1.5, or a combination thereof.