Polymer fiber-containing mats with additives for improved performance of lead acid batteries

Patent metadata

Field	Value
Publication number	US-2019148735-A1
Application number	US-201715812792-A
Country	US
Kind code	A1
Filing date	Nov 14, 2017
Priority date	Nov 14, 2017
Publication date	May 16, 2019
Grant date	—

Abstract

A fiber-containing mats for a lead acid batteries are described. The mats contain a plurality of polymer fibers having at least one additive incorporated into at least a portion of the polymer fibers. The one or more additives suppress hydrogen evolution in the lead acid battery, and have a standard boiling point of 160° C. or more. Also described are lead acid batteries that include an electrode having an electrode active material held in a fiber-containing gauntlet made from a mat or fabric of polymer fibers having at least one additive for improving battery performance incorporated into the polymer fibers.

First claim

What is claimed is:

1 . A fiber-containing mat for a lead acid battery, the mat comprising:
a plurality of polymer fibers; and at least one additive incorporated into at least a portion of the polymer fibers, wherein the at least one additive suppresses hydrogen evolution in the lead acid battery, and wherein the at least one additive has a standard boiling point of 160° C. or more.

2 . The fiber-containing mat of claim 1 , wherein the at least one additive has a standard boiling point of 200° C. or more.

3 . The fiber-containing mat of claim 1 , wherein the at least one additive has a standard boiling point of 250° C. or more.

4 . The fiber-containing mat of claim 1 , wherein the plurality of polymer fibers are selected from the group consisting of polyethylene terephthalate fibers, polybutylene terephthalate fibers, polyethylene fibers, and polypropylene fibers.

5 . The fiber-containing mat of claim 1 , wherein the plurality of polymer fibers comprise polyethylene terephthalate fibers.

6 . The fiber-containing mat of claim 1 , wherein the plurality of polymer fibers are spunbond polymer fibers.

7 . The fiber-containing mat of claim 1 , wherein the plurality of polymer fibers are meltblown polymer fibers.

8 . The fiber-containing mat of claim 1 , wherein the plurality of polymer fibers are spunlace polymer fibers.

9 . The fiber-containing mat of claim 1 , wherein the mat further comprises glass fibers mixed with the plurality of polymers fibers.

10 . The fiber-containing mat of claim 1 , wherein the at least one additive is selected from the group consisting of an aromatic ester, a glycol ester, a phenolic aldehyde, an aromatic aldehyde, and wood flour.

11 . The fiber-containing mat of claim 1 , wherein the at least one additive comprises benzyl benzoate.

12 . The fiber-containing mat of claim 10 , wherein the glycol ester comprises a polyethylene glycol ester.

13 . The fiber-containing mat of claim 10 , wherein the phenolic aldehyde comprises vanillin.

14 . The fiber-containing mat of claim 10 , wherein the aromatic aldehyde is selected from the group consisting of furan-2-aldehyde, benzaldehyde, 2-hydroxybenzaldehyde, 2-methoxybenzaldehyde, 3-methoxybenzaldehyde, 4-methoxybenzaldehyde, 2,4-dimethoxybenzaldehyde, 2,5-dimethoxybenzaldehyde, 3,4-dimethoxybenzaldehyde, 3,5-dimethoxybenzaldehyde, and 2,3,4-trimethoxybenzaldehyde.

15 . The fiber-containing mat of claim 10 , wherein the wood flour comprises oak wood flour.

16 . The fiber-containing mat of claim 1 , wherein the fiber containing mat further comprises a binder.

17 . The fiber-containing mat of claim 16 , wherein the binder includes one or more binders selected from the group consisting of an acrylic binder, a styrene acrylonitrile binder, a styrene butadiene rubber binder, a urea formaldehyde binder, an epoxy binder, a polyurethane binder, a phenolic binder, and a polyester binder.

18 . The fiber-containing mat of claim 1 , wherein the at least one additive comprises 0.01 wt. % to 10 wt. % of the fiber-containing mat.

19 . The fiber-containing mat of claim 1 , wherein the at least one additive comprises 0.01 wt. % to 5 wt. % of the fiber-containing mat.

20 . The fiber-containing mat of claim 1 , wherein the fiber-containing mat is a component of the lead acid battery selected from the group consisting of a separator, a positive electrode pasting mat, a negative electrode pasting mat, and a retainer/support mat.

21 . A fiber-containing mat for a lead acid battery, the fiber-containing mat comprising:
a plurality of polymer fibers; and at least one additive incorporated into at least a portion of the polymer fibers, wherein the at least one additive suppresses hydrogen evolution in the lead acid battery, and wherein the at least one additive has a standard boiling point of 160° C. or more, wherein the fiber-containing mat is a gauntlet for holding an electrode active material for the lead-acid battery.

22 . The fiber-containing mat of claim 21 , wherein the at least one additive has a standard boiling point of 200° C. or more.

23 . The fiber-containing mat of claim 21 , wherein the at least one additive has a standard boiling point of 250° C. or more.

24 . The fiber-containing mat of claim 21 , wherein the plurality of polymer fibers are selected from the group consisting of polyethylene terephthalate fibers, polybutylene terephthalate fibers, polyethylene fibers, and polypropylene fibers.

25 . The fiber-containing mat of claim 21 , wherein the plurality of polymer fibers comprise polyethylene terephthalate fibers.

26 . The fiber-containing mat of claim 21 , wherein the plurality of polymer fibers are selected from the group consisting of spunbond polymer fibers, meltblown polymer fibers, and spunlace polymer fibers.

27 . The fiber-containing mat of claim 21 , wherein the additive is selected from the group consisting of benzyl benzoate, an aromatic ester, a glycol ester, a phenolic aldehyde, an aromatic aldehyde, and a wood flour.

28 . The fiber-containing mat of claim 27 , wherein:
the glycol ester comprises a polyethylene glycol ester, the phenolic aldehyde comprises vanillin; the aromatic aldehyde is selected from the group consisting of furan-2-aldehyde, benzaldehyde, 2-hydroxybenzaldehyde, 2-methoxybenzaldehyde, 3-methoxybenzaldehyde, 4-methoxybenzaldehyde, 2,4-dimethoxybenzaldehyde, 2,5-dimethoxybenzaldehyde, 3,4-dimethoxybenzaldehyde, 3,5-dimethoxybenzaldehyde, and 2,3,4-trimethoxybenzaldehyde; and the wood flour comprises oak wood flour.

29 . The fiber-containing mat of claim 21 , wherein the electrode active material comprises lead oxide.

30 . The fiber-containing mat of claim 21 , wherein the fiber-containing mat is a component of the lead acid battery selected from the group consisting of a separator, a positive electrode pasting mat, a negative electrode pasting mat, and a retainer/support mat.

31 . A fiber-containing mat for a lead acid battery, the mat comprising:
a plurality of polymer fibers; and at least one additive incorporated into at least a portion of the fiber-containing mat, wherein the at least one additive suppresses hydrogen evolution in the lead acid battery, and wherein the at least one additive has a standard boiling point of 160° C. or more.

32 . The fiber-containing mat of claim 31 , wherein the at least one additive is incorporated into a binder that holds together the plurality of polymer fibers in the fiber-containing mat.

33 . The fiber-containing mat of claim 31 , wherein the at least one additive is incorporated into at least a portion of the polymer fibers.

34 . The fiber-containing mat of claim 31 , wherein the at least one additive is incorporated into at least a portion of the polymer fibers and a binder that holds together the plurality of polymer fibers in the fiber-containing mat.

35 . A lead acid battery comprising:
a positive electrode comprising a positive active material, wherein the positive electrode further comprises a fiber-containing gauntlet for holding the positive active material; a negative electrode comprising a lead alloy; a separator that electrically insulates the negative electrode from the positive electrode; and a

Assignees

• Johns Manville

Inventors

• Guo Zhihua
• Sharma Gautam

Classifications

• H01M50/489

  Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties · CPC title

• H01M50/414

  Synthetic resins, e.g. thermoplastics or thermosetting resins · CPC title

• H01M50/437

  Glass · CPC title

• H01M2/1633

  Electricity · mapped topic

• H01M4/666 Primary

  in the form of mixed materials (H01M4/668 takes precedence) · CPC title