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AssigneeHoneycomb Battery Company
InventorBor Z. Jang
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Provided is a polymer hybrid separator for use in a battery, the separator comprising multiple fibers of a first thermally stable polymer (first fibers) and multiple fibers of a second thermally stable polymer (second fibers), which are different in chemical composition or diameter than the first fibers, wherein the first fibers intersect with the second fibers and are bonded by the second fibers at the points of intersection. The thermally stable polymer fibers preferably have a melting point or thermal decomposition temperature higher than 250° C. (preferably >300° C., further preferably >400° C., still further preferably >500° C., and most preferably >600° C.). Also provided are a process for producing such a separator and a lithium or sodium secondary battery comprising a cathode, an anode, such a separator disposed between the cathode and the anode, and an electrolyte.
A polymer-ceramic hybrid separator for use in a battery, the hybrid separator comprising multiple fibers of a first thermally stable polymer, wherein the fibers are individually coated with or substantially encapsulated with a ceramic coating to form a core-shell structure wherein the first thermally stable polymer has a melting point or glass transition temperature higher than 300° C. or a thermal decomposition temperature higher than 400° C., and wherein the hybrid separator has a thickness from 50 nm to 300 μm, the fibers have a diameter from 10 nm to 50 μm, and the ceramic coating or shell has a thickness from 2 nm to 2 μm.
Dependencies are inferred from the claim text.