Chloride catholyte compounds, cathode composites, and solid state batteries made therewith

Patent metadata

Field	Value
Publication number	US-2026051497-A1
Application number	US-202519301429-A
Country	US
Kind code	A1
Filing date	Aug 15, 2025
Priority date	Aug 16, 2024
Publication date	Feb 19, 2026
Grant date	—

Abstract

A cathode composite may comprise about 5% wt/wt to about 99% wt/wt of Na2+(4−y)xMxZr1−xCl6 or Li2+(4−y)xMxZr1−xCl6 and a cathode material as a balance thereof. The cathode material is selected from the group consisting of a carbon-based conductive material, a Na-ion O3-type layered oxide material, a polyanion-type cathode material, and combinations thereof. x is 0≤x≤1, M is a cation, y is M's valence numbers, and M is selected from the group consisting of a Nb5+, Ta5+, V5+, Cr3+, Mo6+, Mo4+, W6+, W4+, Mn2+, Mn4+, Mn5+, Fe3+, Fe2+, Co3+, Co2+, Ni3+, Ni2+, and combinations thereof. A solid-state battery may comprise a housing enclosing an anode and the cathode composite. The cathode composition may function as a cathode and as a solid electrolyte.

First claim

What is claimed is:

1 . A cathode composite comprising:
about 5% wt/wt to about 99% wt/wt of Na 2+(4−y)x M x Zr 1−x Cl 6 or Li 2+(4−y)x M x Zr 1−x Cl 6 ; and a cathode material as the balance thereof; wherein x is 0≤x≤1, M is a cation, y is M's valence numbers, and M is selected from the group consisting of a Nb 5+ , Ta 5+ , V 5+ , Cr 3+ , Mo 6+ , Mo 4+ , W 6+ , W 4+ , Mn 2+ , Mn 4+ , Mn 5+ , Fe 3+ , Fe 2+ , Co 3+ , Co 2+ , Ni 3+ , Ni 2+ , and combinations thereof.

2 . The cathode composite of claim 1 , wherein the Na 2+(4−y)x M x Zr 1−x Cl 6 or Li 2+(4−y)x M x Zr 1−x Cl 6 comprise at least 20% wt/wt of the cathode composite.

3 . The cathode composite of claim 1 , wherein the Na 2+(4−y)x M x Zr 1−x Cl 6 or Li 2+(4−y)x M x Zr 1−x Cl 6 comprise at least 50% wt/wt of the cathode composite.

4 . The cathode composite, of claim 1 , wherein the cathode material is selected from the group consisting of a carbon-based conductive material, a Na-ion O 3 -type layered oxide material, a polyanion-type cathode material, and combinations thereof.

5 . The cathode composite of claim 1 , wherein the cathode material is selected from the group consisting of sodium chromium oxide (NaCrO 2 ), sodium nickel iron manganese oxide NaNi 1/3 Fe 1/3 Mn 1/3 O 2 , iron-based mixed phosphate-pyrophosphate Na 2 Fe 3 (PO 4 ) 2 (P 2 O 7 ), sodium vanadium phosphate (Na 3 V 2 (PO 4 ) 3 ), sodium titanium, phosphate (NaTi 2 (PO 4 ) 3 ), sodium iron sulfide (Na 2 FeS 2 ), LiCoO 2 , LiMnxNiyCozO 2 , LiFePO 4 , and LiFexMnyPO 4 , and combinations thereof.

6 . The cathode composite of claim 4 , wherein the carbon-based conductive material is selected from the group consisting of carbon nanofiber, vapor grown carbon fiber, graphene, carbon nanotubes, carbon black, carbon dots, graphite, and combinations thereof.

7 . The cathode composite of claim 4 , wherein the Na-ion O 3 -type layered oxide material or the polyanion-type cathode material is present without the carbon-based conductive material.

8 . The cathode composite of claim 4 , wherein the carbon-based conductive material is present without the Na-ion O 3 -type layered oxide.

9 . The solid-state battery of claim 1 , wherein the polyanion-type cathode material is present without the carbon-based conductive material.

10 . A solid-state battery comprising:
a housing enclosing an anode and a cathode composite, the cathode composite comprising:
about 5% wt/wt to about 99% wt/wt of Na 2+(4−y)x M x Zr 1−x Cl 6 or Li 2+(4−y)x M x Zr 1−x Cl 6 ; and
a cathode material as the balance thereof,
wherein x is 0≤x≤1, M is a cation, y is M's valence numbers, and M is selected from the group consisting of a Nb 5+ , Ta 5+ , V 5+ , Cr 3+ , Mo 6+ , Mo 4+ , W 6+ , W 4+ , Mn 2+ , Mn 4+ , Mn 5+ , Fe 3+ , Fe 2+ , Co 3+ , Co 2+ , Ni 3+ , Ni 2+ , and combinations thereof,
wherein the cathode composition functions as a cathode and as a solid electrolyte.

11 . The solid-state battery of claim 10 , wherein the Na 2+(4−y)x M x Zr 1−x Cl 6 or Li 2+(4−y)x M x Zr 1−x Cl 6 comprise at least 20% wt/wt of the cathode composite.

12 . The solid-state battery of claim 10 , wherein the Na 2+(4−y)x M x Zr 1−x Cl 6 or Li 2+(4−y)x M x Zr 1−x Cl 6 comprise at least 50% wt/wt of the cathode composite.

13 . The solid-state battery of claim 10 , wherein the cathode material is selected from the group consisting of a carbon-based conductive material, a Na-ion O 3 -type layered oxide material, a polyanion-type cathode material, and combinations thereof.

14 . The solid-state battery of claim 10 , wherein the cathode material is selected from the group consisting of sodium chromium oxide (NaCrO 2 ), sodium nickel iron manganese oxide NaNi 1/3 Fe 1/3 Mn 1/3 O 2 , iron-based mixed phosphate-pyrophosphate Na 2 Fe 3 (PO 4 ) 2 (P 2 O 7 ), sodium vanadium phosphate (Na 3 V 2 (PO 4 ) 3 ), sodium titanium, phosphate (NaTi 2 (PO 4 ) 3 ), sodium iron sulfide (Na 2 FeS 2 ), LiCoO 2 , LiMnxNiyCozO 2 , LiFePO 4 , and LiFexMnyPO 4 , and combinations thereof.

15 . The solid-state battery of claim 10 , wherein the carbon-based conductive material is selected from the group consisting of carbon nanofiber, vapor grown carbon fiber, graphene, carbon nanotubes, carbon black, carbon dots, graphite, and combinations thereof.

16 . The solid-state battery of claim 10 , wherein the Na-ion O 3 -type layered oxide is present without the carbon-based conductive material.

17 . The solid-state battery of claim 10 , wherein the carbon-based conductive material is present without the Na-ion O 3 -type layered oxide.

18 . The solid-state battery of claim 10 , wherein the polyanion-type cathode material is present without the carbon-based conductive material.

19 . The solid-state battery of claim 10 , wherein the cathode material is the sole solid electrolyte.

20 . A method of making a cathode composite, the method comprising:
providing an aliovalent substituted solid electrolyte material having a general formula of

wherein x is 0≤x≤1, M is a cation, and y is M's valence numbers; and M is selected from the group consisting of a Nb 5+ , Ta 5+ , V 5+ , Cr 3+ , Mo 6+ , Mo 4+ , W 6+ , W 4+ , Mn 2+ , Mn 4+ , Mn 5+ , Fe 3+ , Fe 2+ , Co 3+ , Co 2+ , Ni 3+ , Ni 2+ , and combinations thereof;
providing a cathode material;
mixing the aliovalent substituted solid electrolyte material with the cathode material to form a cathode composite.

Assignees

• Univ California

Inventors

• Ridley Phillip
• Duong George
• Meng Ying Shirley

Classifications

• H01M2300/0068

  inorganic · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• H01M4/5825

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M2004/028

  Positive electrodes · CPC title