Nanocomposite battery electrode particles with changing properties
First Claim
1. A battery electrode composition comprising composite particles, each composite particle comprising:
- a high-capacity active material provided to store and release ions during battery operation, wherein the active material exhibits (i) a specific capacity of at least 220 mAh/g as a cathode active material or (ii) a specific capacity of at least 400 mAh/g as an anode active material;
a porous, electrically-conductive scaffolding matrix material within the pores of which the active material is disposed; and
a shell at least partially encasing the active material and the scaffolding matrix material,wherein each composite particle includes a first region from the center to a first radius that is halfway to a perimeter of the scaffolding matrix material and a second region from the center to a second radius at the perimeter the scaffolding matrix material, andwherein each composite particle exhibits at least one average material property that is different in the first and second regions and that changes from the center to the perimeter of the scaffolding matrix material.
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Accused Products
Abstract
Battery electrode compositions and methods of fabrication are provided that utilize composite particles. Each of the composite particles may comprise, for example, a high-capacity active material and a porous, electrically-conductive scaffolding matrix material. The active material may store and release ions during battery operation, and may exhibit (i) a specific capacity of at least 220 mAh/g as a cathode active material or (ii) a specific capacity of at least 400 mAh/g as an anode active material. The active material may be disposed in the pores of the scaffolding matrix material. According to various designs, each composite particle may exhibit at least one material property that changes from the center to the perimeter of the scaffolding matrix material.
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Citations
29 Claims
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1. A battery electrode composition comprising composite particles, each composite particle comprising:
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a high-capacity active material provided to store and release ions during battery operation, wherein the active material exhibits (i) a specific capacity of at least 220 mAh/g as a cathode active material or (ii) a specific capacity of at least 400 mAh/g as an anode active material; a porous, electrically-conductive scaffolding matrix material within the pores of which the active material is disposed; and a shell at least partially encasing the active material and the scaffolding matrix material, wherein each composite particle includes a first region from the center to a first radius that is halfway to a perimeter of the scaffolding matrix material and a second region from the center to a second radius at the perimeter the scaffolding matrix material, and wherein each composite particle exhibits at least one average material property that is different in the first and second regions and that changes from the center to the perimeter of the scaffolding matrix material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 27, 28, 29)
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24. A method of fabricating a battery electrode composition comprising composite particles, the method comprising:
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providing a high-capacity active material to store and release ions during battery operation, wherein the active material exhibits (i) a specific capacity of at least 220 mAh/g as a cathode active material or (ii) a specific capacity of at least 400 mAh/g as an anode active material; forming a porous, electrically-conductive scaffolding matrix material within the pores of which the active material is disposed; and forming a shell at least partially encasing the active material and the scaffolding matrix material, wherein each composite particle includes a first region from the center to a first radius that is halfway to a perimeter of the scaffolding matrix material and a second region from the center to a second radius at the perimeter the scaffolding matrix material, and wherein each composite particle is formed with at least one average material property that is different in the first and second regions and that changes from the center to the perimeter of the scaffolding matrix material. - View Dependent Claims (25, 26)
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Specification