Electrodepositable battery electrode coating compositions having coated active particles

Patent metadata

Field	Value
Publication number	US-2020343526-A1
Application number	US-201916395677-A
Country	US
Kind code	A1
Filing date	Apr 26, 2019
Priority date	Apr 26, 2019
Publication date	Oct 29, 2020
Grant date	—

Abstract

The present invention is directed towards an electrodepositable coating composition comprising an electrochemically active material comprising a protective coating; an electrodepositable binder; and an aqueous medium. Also disclosed herein is a method of coating a substrate, as well as coated substrates and electrical storage devices.

First claim

We claim:

1 . An electrodepositable coating composition comprising:
an electrochemically active material comprising a protective coating; an electrodepositable binder; and an aqueous medium.

2 . The electrodepositable coating composition of claim 1 , wherein the protective coating comprises a metal compound or complex.

3 . The electrodepositable coating composition of claim 2 , wherein the metal compound or complex comprises (i) a metal chalcogen; (ii) a metal pnictogen; (iii) a metal halide; (iv) a metal oxyhalide; (v) a metal oxynitride; (vi) a metal phosphate; (vi) a metal carbide; (vii) a metal oxycarbide; (viii) a metal carbonitride; (ix) an olivine; (x) a NaSICON structure; (xi) a polymetallic ionic structure; (xii) a metal organic structure or complex; (xiii) a polymetallic organic structure or complex; or (xiv) a metal carbon-based coating.

4 . The electrodepositable coating composition of claim 1 , wherein the protective coating comprises a metal-oxide coating.

5 . The electrodepositable coating composition of claim 4 , wherein the metal-oxide of the metal-oxide coating comprises an oxide of titanium.

6 . The electrodepositable coating composition of claim 5 , wherein the oxide of titanium comprises titania.

7 . The electrodepositable coating composition of claim 4 , wherein the metal-oxide of the metal-oxide coating comprises an oxide of aluminum.

8 . The electrodepositable coating composition of claim 7 , wherein the oxide of aluminum comprises alumina.

9 . The electrodepositable coating composition of claim 1 , wherein the protective coating comprises a carbon-based coating.

10 . The electrodepositable coating composition of claim 9 , wherein the carbon-based coating comprises a metal carbonate.

11 . The electrodepositable coating composition of claim 10 , wherein the carbon-based coating comprises lithium carbonate.

12 . The electrodepositable coating composition of claim 1 , wherein the protective coating comprises a non-metal compound or complex.

13 . The electrodepositable coating composition of claim 12 , wherein the non-metal compound or complex comprises (i) a non-metal oxide; (ii) a non-metal nitride; (iii) a non-metal carbonitride; (iv) a non-metal fluoride; (v) a non-metallic organic structures or complexes; (vi) or a non-metal oxyfluoride.

14 . The electrodepositable coating composition of claim 1 , wherein the electrochemically active material comprises a material capable of incorporating lithium, and the material capable of incorporating lithium comprises LiCoO 2 , LiNiO 2 , LiFePO 4 , LiCoPO 4 , LiMnO 2 , LiMn 2 O 4 , Li(NiMnCo)O 2 , Li(NiCoAl)O 2 , carbon-coated LiFePO 4 , or a combination thereof.

15 . The electrodepositable coating composition of claim 1 , wherein the electrochemically active material comprises a material capable of lithium conversion, and the material capable of lithium conversion comprises sulfur, LiO 2 , FeF 2 and FeF 3 , Si, aluminum, tin, SnCo, Fe 3 O 4 , or combinations thereof.

16 . The electrodepositable coating composition of claim 1 , wherein the electrodepositable binder comprises a fluoropolymer.

17 . The electrodepositable coating composition of claim 1 , wherein the electrodepositable binder comprises a pH-dependent rheology modifier.

18 . The electrodepositable coating composition of claim 17 , wherein the pH-dependent rheology modifier comprises an alkali-swellable rheology modifier.

19 . The electrodepositable coating composition of claim 17 , wherein the pH-dependent rheology modifier comprises an acid-swellable rheology modifier.

20 . The electrodepositable coating composition of claim 16 , wherein the electrodepositable binder further comprises a dispersant.

21 . The electrodepositable coating composition of claim 1 , wherein the electrodepositable binder comprises an ionic, film-forming resin.

22 . The electrodepositable coating composition of claim 15 , further comprising a curing agent.

23 . A method of coating a substrate, the method comprising:
electrophoretically depositing the electrodepositable coating composition of claim 1 onto a substrate.

24 . A coated substrate comprising an electrical current collector and a coating formed on the at least a portion of the electrical current collector, wherein the coating is deposited from the electrodepositable coating composition of claim 1 .

25 . The coated substrate of claim 24 , wherein the electrical current collector comprises aluminum, copper, steel, stainless steel, nickel, conductive carbon, a conductive primer coating, or an electrically conductive porous polymer.

26 . The coated substrate of claim 24 , wherein the coated substrate comprises a positive electrode.

27 . The coated substrate of claim 24 , wherein the coated substrate comprises a negative electrode.

28 . The coated substrate of claim 24 , wherein the electrical current collector is pretreated with a pretreatment composition.

29 . An electrical storage device comprising:
(a) an electrode comprising the coated substrate of claim 24 ; (b) a counter-electrode, and (c) an electrolyte.

30 . The electrical storage device of claim 29 , wherein the electrical storage device comprises a cell.

31 . The electrical storage device of claim 29 , wherein the electrical storage device comprises a battery pack.

32 . The electrical storage device of claim 29 , wherein the electrical storage device comprises a secondary battery.

33 . The electrical storage device of claim 29 , wherein the electrical storage device comprises a capacitor.

34 . The electrical storage device of claim 29 , wherein the electrical storage device comprises a supercapacitor.

35 . The electrical storage device of claim 29 , wherein the electrical storage device comprises a pseudocapacitor.

Assignees

• Ppg Ind Ohio Inc

Inventors

• Oakes Landon J
• Hellring Stuart D
• Orler Haley L

Classifications

• H01M4/623

  fluorinated polymers · CPC title

• H01M4/622

  being polymers · CPC title

• H01M4/139

  Processes of manufacture · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M4/0457 Primary

  from dispersions or suspensions; Electrophoresis · CPC title