IP Library › Granted Patent US 12,218,344
Granted Patent B2
US 12,218,344 · App. 17/568,898 · Granted Feb 4, 2025

Nanoporous lithium vanadium fluorophosphate materials and cathodes for fast charging li-ion batteries

Inventors: Sarah H. Tolbert (Encino, CA); Terri C. Lin (Fremont, CA)
Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
H01M4/366H01M4/5825H01M4/625H01M10/0525H01M2004/021H01M2004/028
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Quick Facts
Patent No.
US 12,218,344
App. No.
17/568,898
Granted
Feb 4, 2025
Kind
B2
Abstract

Nanoporous carbon coated lithium vanadium fluorophosphate materials and cathodes for fast charging li-ion batteries are described. Formation of the materials using polymer-templating is also described.

Claims (20)

1. A cathode material for lithium ion batteries, the cathode material comprising:

carbon coated nanoporous lithium vanadium fluorophosphate (c-nLVPF) having a templated pore structure;

wherein the cathode material is synthesized using a combination of a fluoropolymer and polymethyl methacrylate (PMMA) colloids that provide a fluorine source, an oxygen scavenger, and a template material for forming the pore structure in the cathode material.

2. A cathode material for lithium ion batteries, the cathode material comprising:

carbon coated nanoporous lithium vanadium fluorophosphate (c-nLVPF) having a substantially uniform pore structure;

wherein the cathode material is synthesized using a combination of a fluoropolymer and polymethyl methacrylate (PMMA) colloids that provide a fluorine source, an oxygen scavenger, and a template material for forming the pore structure in the cathode material.

3. A cathode material for lithium ion batteries, the cathode material comprising:

carbon coated nanoporous lithium vanadium fluorophosphate (c-nLVPF) having a substantially uniform templated pore structure;

wherein the cathode material is synthesized using a combination of a fluoropolymer and polymethyl methacrylate (PMMA) colloids that provide a fluorine source, an oxygen scavenger, and a template material for forming the pore structure in the cathode material.

4. The cathode material of any of claims 1 through 3 , wherein the pore structure comprises:

interconnected pore walls having a thickness from about 10 nm to about 500 nm; and

pores having a diameter from about 10 nm to about 500 nm.

5. The cathode material of any of claims 1 through 3 , wherein the pore structure comprises interconnected pore walls having a carbon coating with a thickness from about 2 nm to 200 nm.

6. The cathode material of any of claims 1 through 3 , wherein the pore structure comprises interconnected pore walls having a carbon coating with a thickness of about 5 nm.

7. The cathode material of any of claims 1 through 3 , wherein the pore structure is formed using a fluoropolymer as a template material.

8. The cathode material of claim 7 , wherein the fluoropolymer comprises polytetrafluoroethylene (PTFE).

9. The cathode material of any of claims 1 through 3 , wherein the fluoropolymer comprises polytetrafluoroethylene (PTFE).

10. The cathode material of any of claims 1 through 3 , wherein the cathode material exhibits diffusion controlled charge storage.

11. The cathode material of claim 10 , wherein a phase transition occurs in the cathode material during charge and discharge.

12. The cathode material of any of claims 1 through 3 , wherein the cathode material is a component of a Nb 2 O 5 |c-nLVPF cell.

Assignments (2)
CONFIRMATORY LICENSE Recorded Apr 27, 2023
From: UNIVERSITY OF CALIFORNIA LOS ANGELES
To: UNITED STATES DEPARTMENT OF ENERGY
Reel/Frame 063472/0325 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 1, 2022
From: TOLBERT, SARAH H.; LIN, TERRI C.
To: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Reel/Frame 059132/0011 →
Continuity (3)
Continuation PCTUS2020042394 · Jul 16, 2020
Provisional Application 62875095 · Jul 17, 2019
Related Publication 20220209224A1 · Jun 30, 2022
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