Oxidized carbon blacks and applications for lead acid batteries

Patent metadata

Field	Value
Publication number	US-10468682-B2
Application number	US-201815923054-A
Country	US
Kind code	B2
Filing date	Mar 16, 2018
Priority date	Jul 17, 2015
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

Disclosed herein are oxidized carbon blacks, which can be incorporated into electrode compositions for lead acid batteries. In some embodiments, the oxidized carbon blacks have a BET surface area ranging from 650 to 2100 m2/g; an oil absorption number (OAN) ranging from 35 to 500 mL/100 g; and a volatile content of at least 5.5 wt. % relative to the total weight of the oxidized carbon black, as determined by weight loss at 950° C.

First claim

The invention claimed is:

1. An oxidized carbon black having the following properties:
a BET surface area ranging from 650 to 2100 m 2 /g;
an oil absorption number (OAN) ranging from 35 to 500 mL/100 g; and
a volatile content of at least 5.5 wt. % relative to the total weight of the oxidized carbon black, as determined by weight loss at 950° C.

2. The oxidized carbon black of claim 1 , wherein the oxidized carbon black has a BET surface area ranging from 650 to 1500 m 2 /g.

3. The oxidized carbon black of claim 1 , wherein the oxidized carbon black has an OAN ranging from 35 to 200 mL/100 g.

4. The oxidized carbon black of claim 1 , wherein the oxidized carbon black has a surface energy of at least 25 mJ/m 2 .

5. The oxidized carbon black of claim 1 , wherein the oxidized carbon black has a crystallite size (L a ) of at least 16 Å, as determined by Raman spectroscopy.

6. An electrode comprising the oxidized carbon black of claim 1 .

7. A lead acid battery comprising the electrode of claim 6 .

8. An oxidized carbon black having the following properties:
a BET surface area ranging from 650 to 2100 m 2 /g;
an oil absorption number (OAN) ranging from 35 to 500 mL/100 g; and
a total oxygen content of at least 3.5 wt. % relative to the total weight of the oxidized carbon black.

9. The oxidized carbon black of claim 8 , wherein the oxidized carbon black has a BET surface area ranging from 650 to 1500 m 2 /g.

10. The oxidized carbon black of claim 8 , wherein the oxidized carbon black has an OAN ranging from 35 to 200 mL/100 g.

11. The oxidized carbon black of claim 8 , wherein the oxidized carbon black has a surface energy of at least 25 mJ/m 2 .

12. The oxidized carbon black of claim 8 , wherein the oxidized carbon black has a crystallite size (L a ) of at least 16 Å, as determined by Raman spectroscopy.

13. An electrode comprising the oxidized carbon black of claim 8 .

14. A lead acid battery comprising the electrode of claim 13 .

15. An oxidized carbon black having the following properties:
a BET surface area ranging from 650 to 2100 m 2 /g;
an oil absorption number (OAN) ranging from 35 to 500 mL/100 g; and
a total titratable acidic group content of at least 0.5 μmol/m 2 , as determined by Boehm's titration method.

16. The oxidized carbon black of claim 15 , wherein the oxidized carbon black has a BET surface area ranging from 650 to 1500 m 2 /g.

17. The oxidized carbon black of claim 15 , wherein the oxidized carbon black has an OAN ranging from 35 to 200 mL/100 g.

18. The oxidized carbon black of claim 15 , wherein the oxidized carbon black has a surface energy of at least 25 mJ/m 2 .

19. The oxidized carbon black of claim 15 , wherein the oxidized carbon black has a crystallite size (L a ) of at least 16 Å, as determined by Raman spectroscopy.

20. An electrode comprising the oxidized carbon black of claim 15 .

Assignees

• Cabot Corp

Inventors

• Korchev Andriy
• Dupasquier Aurelien
• Atanassova Paolina

Classifications

• H01M4/56

  of lead · CPC title

• H01M4/625 Primary

  Carbon or graphite · CPC title

• C01P2006/19

  Oil-absorption capacity, e.g. DBP values · CPC title

• C01P2006/40

  Electric properties · CPC title

• H01M10/06

  Lead-acid accumulators (semi-lead accumulators H01M10/20) · CPC title