Functionalized lead acid battery separators, improved lead acid batteries, and related methods
In accordance with at least selected embodiments, the present application or invention is directed to novel or improved porous membranes or substrates, separator membranes, separators, composites, electrochemical devices, batteries, methods of making such membranes or substrates, separators, and/or batteries, and/or methods of using such membranes or substrates, separators and/or batteries. In accordance with at least certain embodiments, the present application is directed to novel or improved porous membranes having a coating layer, battery separator membranes having a coating layer, separators, energy storage devices, batteries, including lead acid batteries including such separators, methods of making such membranes, separators, and/or batteries, and/or methods of using such membranes, separators and/or batteries. The disclosed separators and/or batteries have improved charge acceptance, improved surface conductivity, improved oxidation resistance, reduced acid stratification, improved resistance to metal contamination induced oxidation, reduced black residue, improved wettability, and/or improved stiffness.
1. A lead acid battery separator comprising:
a filled porous polyolefin membrane comprising a first surface;
one or more of an absorbent glass mat (AGM), a glass mat, a pasting paper, a retainer mat, a gauntlet, or combinations thereof adjacent to said first surface; and,
wherein at least one of said filled porous polyolefin membrane or said absorbent glass mat (AGM), glass mat, pasting paper, retainer mat, gauntlet, or combinations thereof has, therein and/or thereon, a metal oxide and a material that is conductive and/or semi-conductive.
2. The lead acid battery separator of claim 1 , wherein said conductive or semi-conductive material comprises a form of carbon.
3. The lead acid battery separator of claim 1 , wherein said filled porous polyolefin membrane is microporous.
4. The lead acid battery separator of claim 1 , wherein said filled porous polyolefin membrane comprises ribs, cross-ribs, perforations, or dimples.
5. The lead acid battery separator of claim 1 , wherein said metal oxide is at least one of the group consisting of aluminum oxide (Al 2 O 3 ), boehmite (AlO(OH)), silicon oxide, oxides of transition metals, and combinations thereof.
6. The lead acid battery separator of claim 5 , wherein said metal oxide is an oxide of transition metals, and the transition metal is zinc or titanium.
7. The lead acid battery separator of claim 1 , wherein at least one of said filled porous polyolefin membrane or said absorbent glass mat (AGM), glass mat, pasting paper, retainer mat, gauntlet, or combinations thereof has therein and/or thereon a metal oxide and a material that is conductive.
8. The lead acid battery separator of claim 1 , wherein at least one of said filled porous polyolefin membrane or said absorbent glass mat (AGM), glass mat, pasting paper, retainer mat, gauntlet, or combinations thereof has therein and/or thereon a metal oxide and a material that is semi-conductive.
9. The lead acid battery separator of claim 1 , comprising the filled porous polyolefin membrane and a glass mat adjacent to said first surface of the filled porous polyolefin membrane, and wherein the glass mat has, therein and/or thereon, a metal oxide and a material that is conductive or semi-conductive.
10. The lead acid battery separator of claim 9 , wherein said absorbent glass mat (AGM), glass mat, pasting paper, retainer mat, gauntlet, or combinations thereof has therein and/or thereon a metal oxide and a material that is semi-conductive or conductive, and faces a positive or negative electrode.
11. The lead acid battery separator of claim 10 , wherein said absorbent glass mat (AGM), glass mat, pasting paper, retainer mat, gauntlet, or combinations thereof faces a positive electrode.
12. The lead acid battery separator of claim 10 , wherein said absorbent glass mat (AGM), glass mat, pasting paper, retainer mat, gauntlet, or combinations thereof faces a negative electrode.
13. A lead acid battery comprising the separator of claim 1 .
14. A lead acid battery comprising the battery separator of claim 1 , wherein the filled porous polyolefin membrane has therein and/or thereon a metal oxide and a material that is semi-conductive or conductive, and faces a positive or negative electrode.
15. The lead acid battery of claim 14 , wherein the filled polyolefin membrane faces the negative electrode.
16. The lead acid battery of claim 14 , wherein the filled polyolefin membrane faces a positive electrode.