Doped conversion materials for secondary battery cathodes

Patent metadata

Field	Value
Publication number	US-10326135-B2
Application number	US-201514826908-A
Country	US
Kind code	B2
Filing date	Aug 14, 2015
Priority date	Aug 15, 2014
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

Battery systems using doped conversion materials as the active material in battery cathodes are provided herein. Doped conversion material may include a defect-rich structure or an amorphous or glassy structure, including at least one or more of a metal material, one or more oxidizing species, a reducing cation species, and a dopant. Methods for fabricating batteries and battery systems with doped conversion material are also provided herein.

First claim

What is claimed is:

1. A cathode for an energy storage device, the cathode comprising:
a conversion chemistry material comprising a dopant,
wherein the conversion chemistry material is selected from the group consisting of FeF 2 , FeF 3 , and FeO d F 3-2d wherein 0≤d≤½;
wherein the dopant is present in the conversion chemistry material in an amount from about 0.01% to 25% (atomic %);
wherein the dopant is a member or a combination thereof selected from the group consisting of Li 2 O, CuF 2 , and MoO x , wherein x is 2 or 3; and
wherein the conversion chemistry material comprising the dopant has at least one of a Li-ion conductivity greater than 1*10 −7 S/cm or an electronic conductivity greater than 10 −8 S/cm.

2. The cathode of claim 1 , wherein the dopant comprises Li 2 O and is present in the conversion chemistry material in an amount from about 0.01% to 10% (atomic %).

3. The cathode of claim 1 , wherein the dopant comprises molybdenum oxide and is present in the conversion chemistry material in an amount from about 0.01% to 10% (atomic %).

4. The cathode of claim 1 , wherein the dopant comprises CuF 2 and is present in the conversion chemistry material in an amount from about 0.01% to 10% (atomic %).

5. The cathode of claim 1 , wherein the conversion chemistry material is FeF 3 , and wherein the dopant is CuF 2 and molybdenum oxide.

6. The cathode of claim 1 , wherein the conversion chemistry material is FeF 3 , and wherein the dopant is CuF 2 and MoO 3 .

7. The cathode of claim 1 , wherein the cathode further comprises an intercalation chemistry material selected from the group consisting of LiMPO 4 , Li x Ti y O 2 , LiMn y O 4 , LiMn y .Ni z O 4 , LiCoO 2 , Li(NiCoMn)O 2 , Li(NiCoAl)O 2 , NMC and NCA;
wherein M is Fe, Ni, Co, or Mn;
wherein 0<x<5;
wherein 0.1<y<7; and
wherein 0<z<1.

8. The cathode of claim 1 , further comprising a solid state catholyte.

9. The cathode of claim 1 , wherein the conversion chemistry material comprising the dopant has a d 50 particle size of 1 nm to 5 μm.

10. The cathode of claim 1 , wherein the conversion chemistry material comprising the dopant is glassy or amorphous.

Assignees

• Quantumscape Corp

Inventors

• Fasching Rainer J
• Loveness Ghyrn E
• Yang Aram
• Allenic Arnold
• Holme Timothy

Classifications

• H01M4/5825

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

• H01M4/0483

  by methods including the handling of a melt (H01M4/0438, take precedence) · CPC title

• H01M4/582 Primary

  Halogenides · CPC title

• H01M4/364

  as mixtures · CPC title

• H01M4/136

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title