# US 2025/0145488 A1 · Synthesis of nanosized cubic lithium lanthanum zirconate fast ion conductor

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

- Number: US 2025/0145488 A1
- Document ID: US20250145488A1
- Status: Published application
- Kind: A1
- Application number: 19/017,102
- Filed: 2025-01-10
- Published: 2025-05-08
- Earliest claimed: 2017-08-25
- Assignees: Arizona Board of Regents on behalf of Arizona State University
- Inventors: Jon Mark Weller; Candace Chan
- Web page: https://patentgrep.com/patent/US20250145488A1

## CPC

- C01G 25/006: {Compounds containing zirconium, with or without oxygen or hydrogen, and containing two or more other elements}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0562: Solid materials
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2002/74: by peak-intensities or a ratio thereof only
- C01P 2002/76: by a space-group or by other symmetry indications
- C01P 2002/85: by XPS, EDX or EDAX data
- C01P 2004/04: obtained by TEM, STEM, STM or AFM
- C01P 2004/51: Particles with a specific particle size distribution
- C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer
- C01P 2004/64: Nanometer sized, i.e. from 1-100 nanometer
- C01P 2006/40: Electric properties
- H01M 2300/0077: based on zirconium oxide
- Y02E 60/10: Energy storage using batteries
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Synthesizing lithium lanthanum zirconate includes combining a reagent composition with a salt composition to yield a molten salt reaction medium, wherein the reagent composition comprises a lithium component, a lanthanum component, and zirconium component having a lithium:lanthanum:zirconium molar ratio of about 7:3:2; heating the molten salt reaction medium to yield a reaction product; and washing the reaction product to yield a crystalline powder comprising lithium lanthanum zirconate.

## Claims

### Claim at position 1

-20. (canceled)

### Claim 21

A method of synthesizing tungsten-doped lithium lanthanum zirconate, the method comprising:
combining a reagent composition with a molten salt composition to yield a salt reaction medium, wherein the reagent composition comprises a lithium component, a lanthanum component, a zirconium component, and a tungsten component; and
heating the salt reaction medium to a temperature in a range of 500° C. to 1000° C. to yield a reaction product comprising tungsten-doped lithium lanthanum zirconate,
wherein the molten salt composition is a eutectic mixture of potassium chloride and lithium chloride.

### Claim 22 (depends on 21)

The method of claim 21, wherein the lithium component comprises lithium nitrate.

### Claim 23 (depends on 21)

The method of claim 21, wherein the lanthanum component comprises lanthanum nitrate.

### Claim 24 (depends on 21)

The method of claim 21, wherein the zirconium component comprises zirconium oxynitrate.

### Claim 25 (depends on 21)

The method of claim 21, wherein the tungsten component comprises sodium tungstate.

### Claim 26 (depends on 21)

The method of claim 21, wherein the salt reaction medium comprises an extrinsic dopant.

### Claim 27 (depends on 26)

The method of claim 26, wherein the extrinsic dopant comprises a tungsten component.

### Claim 28 (depends on 27)

The method of claim 27, wherein a molar ratio of the lithium component, the lanthanum component, the zirconium component, the tungsten component in the reagent composition is 7:3:2:0.25.

### Claim 29 (depends on 21)

The method of claim 21, wherein the tungsten-doped lithium lanthanum zirconate is represented by Li6.3La3Zr1.65 W0.35O12.

### Claim 30 (depends on 21)

The method of claim 21, wherein a ratio of the reagent composition to the molten salt composition in the salt reaction medium is 1:1.