Battery electrode and method for manufacturing same
View Patent ↗A battery electrode with a pasting textile, fabric, or scrim made with an electrode grid (e.g., a stamped grid or expanded metal grid) coated in battery electrode and covered with pasting textile formed of a bonded, non-woven fiber web. The web is formed from one or more fibers with an average length greater than 20 μm. In various embodiments, the web is formed from one or more spun, continuous fibers. The battery electrode may be made in a continuous process where multiple grids are formed in a single sheet, coated with electrode active material, and the scrim before being cut into individual electrodes.
1. A battery electrode comprising:
a grid having a perimeter;
an active material provided on the grid; and
a pasting textile provided on or into the active material, the pasting textile has a thickness of about 0.06 mm to about 5 mm;
wherein the pasting textile includes a fiber web including one or more fibers having an average length greater than 20 μm;
wherein the fibers are about 1 to about 10 denier per fiber; and
wherein the fibers comprise one or more thermoplastic resins.
2. A battery electrode comprising:
a grid having a perimeter;
an active material provided on the grid; and
a pasting textile provided on or into the active material, the pasting textile has a thickness of about 0.06 mm to about 5 mm;
wherein the pasting textile includes a fiber web including one or more fibers having an average length greater than 20 μm;
wherein the fibers are about 1 to about 10 denier per fiber; and
wherein the fibers comprise at least one of the group consisting of polyesters, polypropylene, viscous rayon, or polyamides.
3. The battery electrode of claim 1 wherein the one or more fibers have an average length equal to approximately half of a sum of a length and a width of the grid.
4. The battery electrode of claim 1 wherein the average length of the fibers is from 1.5 mm to 15 mm.
5. The battery electrode of claim 1 wherein the fiber web is point-bonded and non-woven.
6. The battery electrode of claim 1 wherein the pasting textile is about 0.06 to about 0.50 mm in thickness.
7. The battery electrode of claim 6 wherein the pasting textile is about 0.06 to about 0.25 mm in thickness.
8. The battery electrode of claim 1 wherein the pasting textile has a density range of about 0.15 to about 2.0 ounces per square yard.
9. The battery electrode of claim 1 wherein the fibers have a diameter from 10 to 25 μm.
10. The battery electrode of claim 1 wherein the fibers range from about 2 denier to 4 denier per fiber.
11. The battery electrode of claim 1 wherein an end of each fiber is positioned substantially near the perimeter of the grid.