IP Library › Granted Patent US 9,112,231
Granted Patent B2
US 9,112,231 · App. 13/289,473 · Granted Aug 18, 2015

Lead-acid batteries and pastes therefor

Inventors: Paolina Atanassova (Albuquerque, NM); Berislav Blizanac (Albuquerque, NM); Toivo Kodas (Carlisle, MA); Mark Hampden-Smith (Albuquerque, NM); Miodrag Oljaca (Albuquerque, NM)
Assignee: Cabot Corporation
H01M4/625H01M4/14H01M4/20H01M10/121H01M10/4235H01M2004/027Y02E60/126
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Quick Facts
Patent No.
US 9,112,231
App. No.
13/289,473
Granted
Aug 18, 2015
Kind
B2
Abstract

A paste suitable for a negative plate of a lead-acid battery comprises lead oxide and composite particles comprising carbon and silica.

Claims (15)

1. A paste suitable for a negative plate of a lead-acid battery, the paste comprising lead oxide and first composite particles comprising both carbon and silica domains within the same individual particles having an average size of between about 10 to about 20 nm.

2. The paste of claim 1 , wherein the loading of said composite particles is from about 0.2 to about 25 wt % relative to the lead oxide.

3. The paste of claim 1 , wherein the loading of said composite particles is from about 0.5 to about 10 wt % relative to the lead oxide.

4. The paste of claim 1 , wherein the weight ratio of carbon to silica in said composite particles is from about 98:2 to about 50:50.

5. The paste of claim 1 , wherein the weight ratio of carbon to silica in said composite particles is from about 95:5 to about 50:50.

6. The paste of claim 1 , wherein the weight ratio of carbon to silica in said composite particles is from about 90:10 to about 75:25.

7. The paste of claim 1 , wherein the paste further comprises second composite particles different from the first composite particles, the second composite particles comprising silica coated on surfaces of carbon particles.

8. The paste of claim 1 , wherein the paste further comprises second composite particles different from the first composite particles, the second composite particles comprising agglomerates of carbon and silica aggregate particles.

9. The paste of claim 8 , wherein the agglomerates have an average size between about 0.2 and about 10 microns.

10. The paste of claim 1 , wherein the carbon comprises carbon black.

11. The paste of claim 10 , wherein the carbon black has been modified to comprise surface sulfate or sulfonate groups.

12. The paste of claim 1 wherein the composite particles further include at least one of barium sulfate and a lignosulfonate.

13. A negative plate for a lead-acid battery produced from the paste of claim 1 .

14. A lead-acid battery comprising a negative plate produced from the paste of claim 1 .

15. The paste of claim 1 , wherein the composite particles are generally agglomerated into substantially spherical, mesoporous agglomerates.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 23, 2013
From: ATANASSOVA, PAOLINA; BLIZANAC, BERISLAV; KODAS, TOIVO T.; HAMPDEN-SMITH, MARK J.; OLJACA, MIODRAG
To: CABOT CORPORATION
Reel/Frame 029674/0670 →
Continuity (2)
Provisional Application 61410378 · Nov 5, 2010
Related Publication 20120115031A1 · May 10, 2012