Energy storage device having a separator blocking parasitic ions
First Claim
1. An energy storage device comprising:
- a first electrode capable of storing a positive electrical charge;
a second electrode capable of storing a negative electrical charge;
a separator disposed between the first and the second electrodes, the separator creating a dielectric layer between the first and the second electrodes; and
an electrolyte contacting the first electrode, the second electrodes, and the separator and creating an ionic interface with the first and second electrodes,wherein the separator comprises fibrous form chitosan capable of binding parasitic ions contained in the electrolyte, thereby preventing the free circulation of the parasitic ions within the electrolyte.
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Accused Products
Abstract
An energy storage device comprises a pair of electrodes in contact with an electrolyte and a dielectric separator therebetween. The separator comprises a chelating material capable of binding parasitic to ions with the electrolyte, so to prevent the free circulation of the parasitic ions within the electrolyte. In one embodiment, the chelating material comprises chitosan, which may be provided in fibrous form and which may be included within a non-woven fabric of cellulosic and/or olefinic, or which may be instead coated on the separator or otherwise comprised in the separator. In another embodiment, the chelating material comprises chitosan, and the ion-binding capability of the chitosan is enhanced by chemically binding a chelating agent to the chitosan so to create a multi-dentate ligand that binds with the parasitic ions, particularly multi-valent metal ions, to create coordination compounds. One such chelating agent is ethylendiamine tetraacetic acid (EDTA).
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Citations
14 Claims
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1. An energy storage device comprising:
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a first electrode capable of storing a positive electrical charge; a second electrode capable of storing a negative electrical charge; a separator disposed between the first and the second electrodes, the separator creating a dielectric layer between the first and the second electrodes; and an electrolyte contacting the first electrode, the second electrodes, and the separator and creating an ionic interface with the first and second electrodes, wherein the separator comprises fibrous form chitosan capable of binding parasitic ions contained in the electrolyte, thereby preventing the free circulation of the parasitic ions within the electrolyte. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13)
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8. An energy storage device comprising:
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a first electrode capable of storing a positive electrical charge; a second electrode capable of storing a negative electrical charge; a separator disposed between the first and the second electrodes, the separator creating a dielectric layer between the first and second electrodes; and an electrolyte contacting the first electrode, the second electrodes, and the separator and creating an ionic interface with the first and second electrodes, wherein the separator comprises chitosan capable of binding parasitic ions contained in the electrolyte, thereby preventing the free circulation of the parasitic ions within the electrolyte, wherein the ion-binding capability of the chitosan is enhanced by chemically binding a chealating agent with the chitosan. - View Dependent Claims (9, 10, 11, 12, 14)
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Specification