High energy/power density nickel oxide/hydroxide materials and nickel cobalt oxide/hydroxide materials and production thereof

Patent metadata

Field	Value
Publication number	US-2016164072-A1
Application number	US-201615043226-A
Country	US
Kind code	A1
Filing date	Feb 12, 2016
Priority date	Nov 30, 2011
Publication date	Jun 9, 2016
Grant date	—

Abstract

According to one embodiment, a method includes forming a nickel oxide/hydroxide active film onto a substrate from a solution including a nickelous salt and an electrolyte, where the nickel oxide/hydroxide active film has a physical characteristic of maintaining greater than about 80% charge over greater than 500 charge/discharge cycles, and wherein the nickel oxide/hydroxide active film has a physical characteristic of storing electrons at greater than about 0.5 electron per nickel atom.

First claim

What is claimed is:

1 . A method, comprising:
forming a nickel oxide/hydroxide active film onto a substrate from a solution including a nickelous salt and an electrolyte, wherein the nickel oxide/hydroxide active film has a physical characteristic of maintaining greater than about 80% charge over greater than 500 charge/discharge cycles, and wherein the nickel oxide/hydroxide active film has a physical characteristic of storing electrons at greater than about 0.5 electron per nickel atom.

2 . The method of claim 1 , wherein the nickelous salt is selected from a group consisting of: nickel acetate (NiAc), Ni(NO 3 ) 2 , NiSO 4 , and NiCl 2 .

3 . The method of claim 1 , wherein the electrolyte comprises at least one of: potassium acetate (KAc), sodium acetate (NaAc), lithium acetate (LiAc), NaNO 3 , and Na2SO4.

4 . The method of claim 3 , wherein the solution further includes a second electrolyte, the second electrolyte comprising at least one of: potassium fluoride (KF), and sodium fluoride (NaF).

5 . The method of claim 1 , wherein the electrolyte is selected from a group consisting of: LiAc, NaAc, KAc, NaNO 3 , NaF, KF and Na 2 SO 4 .

6 . The method of claim 1 , wherein the nickel oxide/hydroxide active film is formed on the substrate via anodic electrodeposition.

7 . The method of claim 1 , wherein the solution has a pH less than about 6.

8 . The method of claim 1 , wherein the nickel oxide/hydroxide active film formed on the substrate has a thickness in a range from about 20 to about 200 nm.

9 . The method of claim 8 , wherein the thickness of the nickel oxide/hydroxide active film is in a range from about 50 to about 100 nm.

10 . The method of claim 9 , wherein the thickness of the nickel oxide/hydroxide active film varies less than about ±1 nm along all codeposited portions thereof.

11 . The method of claim 1 , wherein the nickel oxide/hydroxide film has a charge rate of greater than about 100 C per hour.

12 . The method of claim 1 , wherein the nickel oxide/hydroxide film includes cobalt.

13 . The method of claim 12 , wherein the nickel oxide/hydroxide active film has a physical characteristic of maintaining greater than about 90% charge over greater than about 800 cycles.

14 . The method of claim 12 , wherein the nickel oxide/hydroxide active film comprises a cobalt (Co) to nickel (Ni) ratio of about 2:1 to about 1:2.

15 . The method of claim 1 , wherein the nickel oxide/hydroxide active film is capable of a 100% depth of discharge at varying discharge rates.

16 . The method of claim 1 , wherein the substrate is porous.

Assignees

• L Livermore Nat Security Llc

Inventors

• Merrill Matthew
• Stadermann Michael

Classifications

• Y10S977/755

  Nanosheet or quantum barrier/well, i.e. layer structure having one dimension or thickness of 100 nm or less · 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

• H01M4/38

  of elements or alloys · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title