POROUS BATTERY ELECTRODE FOR A RECHARGEABLE BATTERY AND METHOD OF MAKING THE ELECTRODE
First Claim
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1. A highly porous battery electrode for a rechargeable battery, the battery electrode comprising:
- a monolithic porous structure having a porosity in the range of from about 74% to about 99% and comprising a conductive material; and
an active material layer on the monolithic porous structure, wherein pores of the monolithic porous structure have a size in the range of from about 0.2 micron to about 10 microns.
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Abstract
A porous battery electrode for a rechargeable battery includes a monolithic porous structure having a porosity in the range of from about 74% to about 99% and comprising a conductive material. An active material layer is deposited on the monolithic porous structure. The pores of the monolithic porous structure have a size in the range of from about 0.2 micron to about 10 microns. A method of making the porous battery electrode is also described.
63 Citations
26 Claims
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1. A highly porous battery electrode for a rechargeable battery, the battery electrode comprising:
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a monolithic porous structure having a porosity in the range of from about 74% to about 99% and comprising a conductive material; and an active material layer on the monolithic porous structure, wherein pores of the monolithic porous structure have a size in the range of from about 0.2 micron to about 10 microns. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of making a battery electrode, the method comprising:
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providing a scaffold of interconnected elements separated by voids; depositing a conductive material through the voids and onto the interconnected elements of the scaffold; removing the scaffold to obtain a monolithic porous structure comprising the conductive material and including pores defined by the interconnected elements of the scaffold; etching the monolithic porous structure to have a porosity in the range of from about 74% to about 97% and a pore size in the range of from about 0.2 micron to about 10 microns; depositing an electrochemically active material on the monolithic porous structure, thereby forming a battery electrode. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A method of making a battery electrode, the method comprising:
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providing a scaffold of interconnected elements separated by voids; depositing a conformal material through the voids onto the interconnected elements of the scaffold; depositing a conductive material through the voids and onto the conformal material; removing the scaffold and the conformal material to obtain a monolithic porous structure comprising the conductive material and including pores defined by the interconnected elements of the scaffold and the overlying conformal material, the monolithic porous structure having a porosity in the range of from about 74% to about 99% and a pore size in the range of from about 0.2 micron to about 10 microns; depositing an electrochemically active material on the monolithic porous structure, thereby forming a battery electrode. - View Dependent Claims (25, 26)
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Specification