Template electrode structures for depositing active materials
First Claim
1. An electrochemically active electrode material for use in a lithium ion cell, the electrochemically active electrode material comprising:
- a nanostructured template comprising a metal silicide; and
a layer of a non-silicide electrochemically active material having a theoretical lithiation capacity of at least about 500 mAh/g coating the nanostructured template, the electrochemically active material configured to take in and release lithium ions during cycling of the lithium ion cell,wherein the nanostructured template facilitates conduction of electrical current to and from the electrochemically active material and provides support to the layer of the electrochemically active material.
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Accused Products
Abstract
Provided are examples of electrochemically active electrode materials, electrodes using such materials, and methods of manufacturing such electrodes. Electrochemically active electrode materials may include a high surface area template containing a metal silicide and a layer of high capacity active material deposited over the template. The template may serve as a mechanical support for the active material and/or an electrical conductor between the active material and, for example, a substrate. Due to the high surface area of the template, even a thin layer of the active material can provide sufficient active material loading and corresponding battery capacity. As such, a thickness of the layer may be maintained below the fracture threshold of the active material used and preserve its structural integrity during battery cycling.
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Citations
28 Claims
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1. An electrochemically active electrode material for use in a lithium ion cell, the electrochemically active electrode material comprising:
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a nanostructured template comprising a metal silicide; and a layer of a non-silicide electrochemically active material having a theoretical lithiation capacity of at least about 500 mAh/g coating the nanostructured template, the electrochemically active material configured to take in and release lithium ions during cycling of the lithium ion cell, wherein the nanostructured template facilitates conduction of electrical current to and from the electrochemically active material and provides support to the layer of the electrochemically active material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A lithium ion electrode for use in a lithium ion cell, the lithium ion electrode comprising:
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an electrochemically active electrode material comprising; a nanostructured template comprising a metal silicide; and a layer of a non-silicide electrochemically active material having a theoretical lithiation capacity of at least about 500 mAh/g coating the nanostructured template, the electrochemically active material configured to take in and release lithium ions during cycling of the lithium ion cell, wherein the nanostructured template facilitates conduction of electrical current to and from the electrochemically active material; and a current collector substrate in electrical communication with the electrochemically active electrode material and comprising the metal of the metal silicide. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A lithium ion cell comprising:
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an electrochemically active electrode material comprising; a nanostructured template comprising a metal silicide; and a layer of non-silicide electrochemically active material having a theoretical lithiation capacity of at least about 500 mAh/g coating the nanostructured template, the electrochemically active material configured to take in and release lithium ions during cycling of the lithium ion cell, wherein the nanostructured template facilitates conduction of electrical current to and from the electrochemically active material; and a current collector substrate in electrical communication with the electrochemically active electrode material and comprising the metal of the metal silicide.
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Specification