# US 10,483,597 B2 · Fiber-containing mats with additives for improved performance of lead acid batteries

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- Number: US 10,483,597 B2
- Document ID: US10483597B2
- Status: Granted
- Kind: B2
- Application number: 15/812,393
- Filed: 2017-11-14
- Published: 2019-05-16
- Granted: 2019-11-19
- Earliest claimed: 2017-11-14
- Assignees: Johns Manville
- Applicants: Johns Manville
- Inventors: Zhihua Guo
- Web page: https://patentgrep.com/patent/US10483597B2

## CPC

- H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)}
- H01M 4/14: Electrodes for lead-acid accumulators
- H01M 4/38: of elements or alloys
- H01M 4/56: of lead
- H01M 10/06: Lead-acid accumulators (semi-lead accumulators H01M10/20)
- H01M 10/12: Construction or manufacture
- H01M 50/414: Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M 50/437: Glass
- H01M 50/44: Fibrous material
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Fiber-containing mats for lead acid batteries are described. The mats may include a plurality of fibers, a binder holding the plurality of fibers together, and one or more additives incorporated into the mat, where the additives may include one or more compounds selected from benzyl benzoate and a glycol ester. Additional fiber-containing mats include a plurality of woven or non-woven fibers and the one or more additives. The fiber-containing mats having the one or more additives may be used in lead-acid batteries that include a positive and negative electrode, a separator, and one or more pasting mats.

## Claims

### Claim 1

A fiber-containing mat for a lead acid battery, the mat comprising:
a plurality of fibers;
a binder holding the plurality of fibers together in the fiber-containing mat; and
one or more additives incorporated into the fiber-containing mat, wherein the one or more additives comprise benzyl benzoate.

### Claim 2 (depends on 1)

The fiber-containing mat of claim 1, wherein the plurality of fibers comprises at least one type of fiber selected from the group consisting of glass fibers, polyester fibers, polyolefin fibers, nylon fibers, aramid fibers, poly(phenylene sulfide) fibers, and carbon fibers.

### Claim 3 (depends on 1)

The fiber-containing mat of claim 1, wherein the plurality of fibers comprise a combination of glass fibers and polymer fibers.

### Claim 4 (depends on 3)

The fiber-containing mat of claim 3, wherein the polymer fibers comprise polyethylene terephthalate.

### Claim 5 (depends on 1)

The fiber-containing mat of claim 1, wherein the plurality of fibers have an average diameter ranging from 0.01 μm to 50 μm.

### Claim 6 (depends on 1)

The fiber-containing mat of claim 1, wherein the one or more additives are incorporated directly onto the plurality of fibers through a sizing composition that is applied to the plurality of fibers.

### Claim 7 (depends on 1)

The fiber-containing mat of claim 1, wherein the one or more additives are incorporated into the binder though a binder composition that includes the one or more additives.

### Claim 8 (depends on 7)

The fiber-containing mat of claim 7, wherein the one or more additives are reversibly reacted with the binder, and wherein the one or more additives are released into an electrolyte during operation of the lead acid battery.

### Claim 9 (depends on 1)

The fiber-containing mat of claim 1, wherein the binder comprises at least one binder that is 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.

### Claim 10 (depends on 1)

The fiber-containing mat of claim 1, wherein the one or more additives comprise 0.01 wt. % to 5 wt. % of the fiber-containing mat.

### Claim 11 (depends on 1)

The fiber-containing mat of claim 1, wherein the binder comprises 1 wt. % to 40 wt. % of the fiber-containing mat.

### Claim 12 (depends on 1)

The fiber-containing mat of claim 1, wherein the fiber-containing mat is a pasting mat for an electrode in the lead acid battery.

### Claim 13 (depends on 1)

The fiber-containing mat of claim 1, wherein the fiber-containing mat is a separator for the lead acid battery.

### Claim 14 (depends on 1)

The fiber-containing mat of claim 1, wherein the fiber-containing mat is a retainer/support mat in contact with a separator for the lead acid battery.

### Claim 15 (depends on 14)

The fiber-containing mat of claim 14, wherein the separator comprises porous membrane comprising polyethylene or rubber.