Methods of coating an electrically conductive substrate and related electrodepositable compositions

Patent metadata

Field	Value
Publication number	US-9520591-B2
Application number	US-201514867307-A
Country	US
Kind code	B2
Filing date	Sep 28, 2015
Priority date	Nov 27, 2012
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

Methods are disclosed in which an electrically conductive substrate is immersed into an electrodepositable composition, the substrate serving as an electrode in an electrical circuit comprising the electrode and a counter-electrode immersed in the composition, a coating being applied onto or over at least a portion of the substrate as electric current is passed between the electrodes. The electrodepositable composition comprises: (a) an aqueous medium; (b) an ionic resin; and (c) solid particles.

First claim

What is claimed is:

1. A method of producing an electrode for a lithium on battery comprising:
immersing an electrically conductive substrate into an electrodepositable composition, the substrate serving as the electrode in an electrical circuit comprising the electrode and a counter-electrode immersed in the composition, a coating being applied onto or over at least a portion of the substrate as electric current is passed between the electrodes,
the electrodepositable composition comprising:
(a) an aqueous medium;
(b) an ionic resin; and
(c) solid particles comprising:
(i) lithium-containing particles, and
(ii) electrically conductive particles;

wherein the composition has a weight ratio of solid particles to ionic resin of at least 17:1 and the weight ratio of lithium-containing particles to electrically conductive particles being at least 3:1.

2. The method of claim 1 , wherein the substrate is a foil comprising aluminum, iron, copper, manganese, nickel, a combination thereof, and/or an alloy thereof.

3. The method of claim 1 , wherein the ionic resin is anionic.

4. The method of claim 3 , wherein the anionic resin comprises a base-neutralized carboxylic acid group-containing resin.

5. The method of claim 1 , wherein the lithium-containing particles comprise LiCoO 2 , LiNiO 2 , LiFePO 4 , LiCoPO 4 , LiMnO 2 , LiMn 2 O 4 , Li(NiMnCo)O 2 , and/or Li(NiCoAl)O 2 .

6. The method of claim 1 , wherein the lithium-containing particles are present in en amount of at least 50 percent by weight, based on the total weight of the solids in the composition.

7. The method of claim 1 , wherein the electrically conductive particles comprise electrically conductive carbon particles.

8. The method of claim 7 , wherein the electrically conductive carbon particles comprise carbon black.

9. The method of claim 1 , wherein the composition has a total solids content of 1 to 5 percent by weight, based on the total weight of the composition.

Assignees

• Ppg Ind Ohio Inc

Inventors

• Daughenbaugh Randy E
• Hellring Stuart D
• Peffer Robin M

Classifications

• H01M4/661

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title

• H01M4/1397

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

• H01M4/505

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

• H01M4/525

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

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title