Structural micro-porous carbon anode for rechargeable lithium-ion batteries
First Claim
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1. A secondary battery comprising:
- a positive electrode capable of reversibly incorporating a lithium atom;
a rechargeable lithium atom-containing negative electrode comprising of three-dimensional porous, carbon structures having a network of cells separated from each other by walls and interconnected by holes through said walls, wherein the cells have diameters in the range of approximately 1 to 100 μ
m, wherein the carbon structures have a macroscopic density of less than 1.0 g/cc; and
a non-aqueous electrolyte solution connecting said positive electrode and negative electrode.
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Abstract
A secondary battery having a rechargeable lithium-containing anode, a cathode and a separator positioned between the cathode and anode with an organic electrolyte solution absorbed therein is provided. The anode comprises three-dimensional microporous carbon structures synthesized from polymeric high internal phase emulsions or materials derived from this emulsion source, i.e., granules, powders, etc.
75 Citations
35 Claims
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1. A secondary battery comprising:
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a positive electrode capable of reversibly incorporating a lithium atom; a rechargeable lithium atom-containing negative electrode comprising of three-dimensional porous, carbon structures having a network of cells separated from each other by walls and interconnected by holes through said walls, wherein the cells have diameters in the range of approximately 1 to 100 μ
m, wherein the carbon structures have a macroscopic density of less than 1.0 g/cc; anda non-aqueous electrolyte solution connecting said positive electrode and negative electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of preparing three dimensional microporous carbon structures suitable for energy storage applications wherein the carbon structures have a network of cells separated from each other by walls and interconnected by holes through said walls, wherein the cells have diameters in the range of approximately 1 to 100 μ
- m. wherein the carbon structures have a macroscopic density of less than approximately 1.0 g/cc, that conaprises the steps of;
mixing a first liquid that comprises a solvent, dissolved therein, polymerizable precursor materials and a surfactant and a second liquid that comprises a temporary pore former to form an emulsion, wherein the first liquid forms a continuous phase and the second liquid forms an internal phase in the emulsion; causing polymerization of the polymerizable precursor materials in the continuous phase such that a cellular polymeric material is formed; removing the solvent, surfactant and internal phase from said cellular polymeric material; and carbonizing said cellular polymeric material to form said three dimensional microporous carbon structures. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
- m. wherein the carbon structures have a macroscopic density of less than approximately 1.0 g/cc, that conaprises the steps of;
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20. A rechargeable electrode suitable for use in secondary batteries prepared by a process comprising the steps of:
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mixing a first liquid that comprises a solvent, dissolved therein, polymerizable precursor materials and a surfactant and a second liquid that comprises a temporary pore former to form an emulsion, wherein the first liquid forms a continuous phase and the second liquid forms an internal phase in the emulsion; causing polymerization of the polymerizable precursor materials in the continuous phase such that a cellular polymeric material is formed; removing the solvent, surfactant and internal phase from said cellular polymeric material; and carbonizing said cellular polymeric material to form said three dimensional structures. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. An energy storage device having an electrode comprising three dimensional microporous carbon structures wherein the carbon structures have a network of cells separated from each other by walls and interconnected by holes through said walls, wherein the cells have diameters in the range of approximately 1 to 100 μ
- m, wherein the carbon structures have a macroscopic density of less than approximately 1.0 g/cc, and wherein the rechargeable electrode is prepared by a process comprising the steps of;
mixing a first liquid that comprises a solvent, dissolved therein, polymerizable precursor materials and a surfactant and a second liquid that comprises a temporary pore former to form an emulsion, wherein the first liquid forms a continuous phase and the second liquid forms an internal phase in the emulsion; causing polymerization of the polymerizable precursor materials in the continuous phase such that a cellular polymeric material is formed; removing the solvent, surfactant and internal phase from said cellular polymeric material; and carbonizing said cellular polymeric material to form said three dimensional microporous carbon structures. - View Dependent Claims (30, 31, 32, 33, 34, 35)
- m, wherein the carbon structures have a macroscopic density of less than approximately 1.0 g/cc, and wherein the rechargeable electrode is prepared by a process comprising the steps of;
Specification