Molybdenum oxides and uses thereof

Patent metadata

Field	Value
Publication number	US-9960417-B2
Application number	US-201314044814-A
Country	US
Kind code	B2
Filing date	Oct 2, 2013
Priority date	Oct 2, 2012
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

The present disclosure describes, among other things, new layered molybdenum oxides for lithium ion battery cathodes from solid solutions of Li 2 MoO 3 and LiCrO 2 . These materials display high energy density, good rate capability, great safety against oxygen release at charged state due mostly to their low voltage. Therefore, these materials have properties desirable for lithium ion battery cathodes.

First claim

What is claimed is:

1. An electrochemically active compound of the formula Li(Li (1-x)/3 Mo (2-2x)/3 Cr x )O 2 , wherein 0.25≤x≤0.35, wherein the compound is characterized in that it allows reversible charging and discharging.

2. The compound of claim 1 , wherein x is 0.3.

3. An electrode material comprising at least one compound of claim 1 .

4. A solid form of a compound of claim 2 , having an X-ray powder diffraction pattern as shown in FIG. 1( d ) .

5. A coated electrode material comprising a compound of claim 1 .

6. The coated electrode material of claim 5 having a coating comprising a member selected from the group consisting of carbon, MgO, Al 2 O 3 , SiO 2 , TiO 2 , ZnO, SnO 2 , ZrO 2 , Li 2 O-2B 2 O 3 glass, phosphates, and combinations thereof.

7. The coated electrode material of claim 6 , wherein the phosphate is selected from the group consisting of AlPO 4 , Li 4 P 2 O 7 , and Li 3 PO 4 .

8. The coated electrode material of claim 6 , wherein the weight ratio of carbon to total MgO, Al 2 O 3 , SiO 2 , TiO 2 , ZnO, SnO 2 , ZrO 2 , Li 2 O-2B 2 O 3 , and phosphates is y:1−y, wherein 0<y≤0.2.

9. The coated electrode material of claim 6 , wherein the coating thickness is no greater than 10 nm.

10. An electrode composition comprising carbon black, a binder, and the coated electrode material of claim 5 .

11. The electrode composition of claim 10 , wherein the coating of the electrode material prevents or lessens electrode transition metal dissolution.

12. The electrode composition of claim 10 , wherein the binder is PTFE.

13. The electrode composition of claim 10 , wherein the weight ratio of coated electrode material to carbon black to binder is v:z:1−v−z, wherein 0.3≤v≤1, 0≤z≤0.7, and 0.3≤v+z<1.

14. A lithium battery comprising the coated electrode material of claim 5 .

Assignees

• Massachusetts Inst Technology

Inventors

• Ceder Gerbrand
• Lee Jinhyuk
• Kim Sangtae
• Li Xin

Classifications

• H01M4/624

  Electric conductive fillers · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · 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

• H01M4/366 Primary

  as layered products · CPC title

• H01M4/625

  Carbon or graphite · CPC title