Electrical power storage devices
First Claim
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1. A power storage device, comprising:
- a positive electrode having a grid;
a negative electrode having a grid; and
a separator separating the positive electrode from the negative electrode;
wherein at least the negative electrode or the positive electrode comprises fibers selected from both a first group consisting of trilobal cross-sectional fibers, quadrilobal cross-sectional fibers, and substantially circular cross-sectional fibers, and a second group consisting of non-straight fibers having shapes selected from the group consisting of a coiled fiber, a looped fiber, and an air entangled fiber;
the fibers being provided in an array of wicking fibers loaded with electrode active material included in the electrode;
wherein the wicking fibers constitute either a mixture of fibers selected from a first group of relatively shorter fiber pieces in addition to a second group of relatively longer fibers, or only selected from the group of relatively shorter fiber pieces.
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Abstract
An electrical storage device includes high surface area fibers (e.g., shaped fibers and/or microfibers) coated with carbon (graphite, expanded graphite, activated carbon, carbon black, carbon nanofibers, CNT, or graphite coated CNT), electrolyte, and/or electrode active material (e.g., lead oxide) in electrodes. The electrodes are used to form electrical storage devices such as electrochemical batteries, electrochemical double layer capacitors, and asymmetrical capacitors.
21 Citations
28 Claims
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1. A power storage device, comprising:
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a positive electrode having a grid; a negative electrode having a grid; and a separator separating the positive electrode from the negative electrode; wherein at least the negative electrode or the positive electrode comprises fibers selected from both a first group consisting of trilobal cross-sectional fibers, quadrilobal cross-sectional fibers, and substantially circular cross-sectional fibers, and a second group consisting of non-straight fibers having shapes selected from the group consisting of a coiled fiber, a looped fiber, and an air entangled fiber;
the fibers being provided in an array of wicking fibers loaded with electrode active material included in the electrode;
wherein the wicking fibers constitute either a mixture of fibers selected from a first group of relatively shorter fiber pieces in addition to a second group of relatively longer fibers, or only selected from the group of relatively shorter fiber pieces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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- 12. A battery comprising at least two grids, active material, and a scrim layer, wherein the scrim layer comprises a fiber mesh provided between the active material and one or more grids and is embedded at least partly in the active material, and wherein the scrim layer is comprised of fibers selected from a group consisting of a coiled fiber, a looped fiber, and an air entangled fiber.
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23. A power storage device, comprising:
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at least one positive electrode; at least one negative electrode; and a mat comprised of a plurality of fibers, wherein the fibers are selected from both of two groups, the first group selected from the group consisting of trilobal cross-sectional fibers, substantially circular cross-sectional fibers, and quadrilobal cross-sectional fibers; and
the second group selected from the group consisting of a coiled fiber, a looped fiber, an air entangled fiber and combinations of the foregoing, and wherein the mat is woven. - View Dependent Claims (24, 25)
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26. A power storage device, comprising:
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at least one positive electrode; at least one negative electrode; and a mat comprised of a plurality of fibers, wherein the fibers are selected from both of two groups, the first group selected from the group consisting of trilobal cross-sectional fibers, substantially circular cross-sectional fibers, and quadrilobal cross-sectional fibers; and
the second group selected from the group consisting of a coiled fiber, a looped fiber, an air entangled fiber and combinations of the foregoing, and wherein the fibers further comprise a crimped fiber. - View Dependent Claims (27, 28)
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Specification