High power, high energy, hybrid electrode and electrical energy storage device made therefrom
First Claim
1. A hybrid electrode for a high power, high energy, electrical storage device, said hybrid electrode comprising:
- a current collector;
a first electroactive material; and
a second electroactive material,wherein;
the first electroactive material has a higher energy density than the second electroactive material;
the second electroactive material has a higher rate capability than the first electroactive material; and
one of the first and second electroactive materials is formed as a first discrete layer in contact with the current collector, and the other of the first and second electroactive materials is formed as a second discrete layer deposited onto the first discrete layer.
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Abstract
A hybrid electrode for a high power, high energy, electrical storage device contains both a high-energy electrode material (42) and a high-rate electrode material (44). The two materials are deposited on a current collector (40), and the electrode is used to make an energy storage device that exhibits both the high-rate capability of a capacitor and the high energy capability of a battery. The two materials can be co-deposited on the current collector in a variety of ways, either in superimposed layers, adjacent layers, intermixed with each other or one material coating the other to form a mixture that is then deposited on the current collector.
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Citations
18 Claims
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1. A hybrid electrode for a high power, high energy, electrical storage device, said hybrid electrode comprising:
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a current collector; a first electroactive material; and a second electroactive material, wherein; the first electroactive material has a higher energy density than the second electroactive material; the second electroactive material has a higher rate capability than the first electroactive material; and one of the first and second electroactive materials is formed as a first discrete layer in contact with the current collector, and the other of the first and second electroactive materials is formed as a second discrete layer deposited onto the first discrete layer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A hybrid electrode for an energy storage device, the hybrid electrode comprising:
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a current collector; a first electroactive material; and a second electroactive material, wherein; the first electroactive material has a higher energy density than the second electroactive material; the second electroactive material has a higher rate capability than the first electroactive material; and the second electroactive material is at least partially coated by the first electroactive material. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A hybrid electrode for an energy storage device, the hybrid electrode comprising:
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a current collector having separate first and second regions located on a surface thereof; a first electroactive material disposed on the first region of the current collector; and a second electroactive material disposed on the second region of the current collector, wherein the fist electroactive material has a higher energy density than the second electroactive material, and the second electroactive material has a higher rate capability than the first electroactive material. - View Dependent Claims (16, 18)
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17. A hybrid electrode consisting of a first electroactive material comprising amorphous carbon intercalated with lithium, and a second electroactive material comprising polyfluorophenylthiopene, wherein the first electroactive material has a higher energy density than the second electroactive material, and wherein the second electroactive material has a higher rate capability than the first electroactive material.
Specification