Electrode and electrical storage device for lead-acid system
First Claim
1. An electrode comprising active battery material for a lead-acid storage battery, wherein a surface of the electrode is provided with a coating layer comprising a carbon mixture containing composite carbon particles, wherein each of the composite carbon particles comprises a particle of a first capacitor carbon material with particles of a second electrically conductive carbon material adhered to a surface of the first capacitor carbon material, and wherein a surface coverage on the particles of the first capacitor carbon material by the second electrically conductive carbon material is at least 20%.
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Accused Products
Abstract
The present invention generally relates to electrodes for use in lead-acid battery systems, batteries and electrical storage devices thereof, and methods for producing the electrodes, batteries and electrical storage devices. In particular, the electrodes comprise active battery material for a lead-acid storage battery, wherein the surface of the electrode is provided with a coating layer comprising a carbon mixture containing composite carbon particles, wherein each of the composite carbon particles comprises a particle of a first capacitor carbon material combined with particles of a second electrically conductive carbon material. The electrical storage devices and batteries comprising the electrodes are, for example, particularly suitable for use in hybrid electric vehicles requiring a repeated rapid charge/discharge operation in the PSOC, idling-stop system vehicles, and in industrial applications such as wind power generation, and photovoltaic power generation.
192 Citations
35 Claims
- 1. An electrode comprising active battery material for a lead-acid storage battery, wherein a surface of the electrode is provided with a coating layer comprising a carbon mixture containing composite carbon particles, wherein each of the composite carbon particles comprises a particle of a first capacitor carbon material with particles of a second electrically conductive carbon material adhered to a surface of the first capacitor carbon material, and wherein a surface coverage on the particles of the first capacitor carbon material by the second electrically conductive carbon material is at least 20%.
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15. An electrical storage device comprising at least one lead dioxide based positive electrode and at least one sponge lead based negative electrode in a sulphuric acid electrolyte solution, wherein the negative electrode comprises:
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a current collector; a first layer deposited on the current collector, the first layer comprising active battery material of sponge lead; a second layer in contact with at least a portion of the first layer, the second layer comprising composite carbon particles, wherein each of the composite carbon particles comprises a particle of a first capacitor carbon material with particles of a second electrically conductive carbon material adhered to a surface of the first capacitor carbon material, and wherein a surface coverage on the particles of the first capacitor carbon material by the second electrically conductive carbon material is at least 20%.
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16. A method for preparing an electrode comprising active battery material for a lead-acid storage battery, wherein the method comprises:
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preparing composite carbon particles by at least one of grinding, granulating and unifying, particles of a first capacitor carbon material with particles of a second electrically conductive carbon material having a particle size less than that of the first capacitor carbon material, whereby each composite carbon particle comprises a particle of the first capacitor carbon material with particles of the second electrically conductive carbon material adhered to a surface of the first capacitor carbon material such that a surface coverage on the particles of the first capacitor carbon material by the second electrically conductive carbon materials is at least 20%; preparing a carbon mixture comprising the composite carbon particles; and providing the carbon mixture as a coating on at least a portion of the surface of an electrode comprising active battery material for a lead-acid storage battery.
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- 17. An electrode comprising active battery material for a lead-acid storage battery, wherein the surface of the electrode is provided with a coating layer comprising a carbon mixture containing composite carbon particles, wherein each of the composite carbon particles comprises a particle of a first capacitor carbon material with particles of a second electrically conductive carbon material adhered to a surface of the first capacitor carbon material, wherein a surface coverage on the particles of the first capacitor carbon material by the second electrically conductive carbon material is at least 20%, and wherein the carbon mixture further comprises a third electrically conductive carbon material.
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34. An electrical storage device comprising at least one lead dioxide based positive electrode and at least one sponge lead based negative electrode in a sulphuric acid electrolyte solution, wherein the negative electrode comprises:
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a current collector; a first layer deposited on the current collector, the first layer comprising active battery material of sponge lead; a second layer in contact with at least a portion of the first layer, the second layer comprising composite carbon particles, wherein each of the composite carbon particles comprises a particle of a first capacitor carbon material with particles of a second electrically conductive carbon material adhered to a surface of the first capacitor carbon material, and wherein a surface coverage on the particles of the first capacitor carbon material by the second electrically conductive carbon material is at least 20%, and the second layer further comprising a third electrically conductive material.
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35. A method for preparing an electrode comprising active battery material for a lead-acid storage battery, wherein the method comprises:
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preparing composite carbon particles by at least one of grinding, granulating and unifying, particles of a first capacitor carbon material with particles of a second electrically conductive carbon material having a particle size less than that of the first capacitor carbon material, whereby each composite carbon particle comprises a particle of the first capacitor carbon material with particles of the second electrically conductive carbon material adhered to a surface of the first capacitor carbon material such that a surface coverage on the particles of the first capacitor carbon material by the second electrically conductive carbon material is at least 20%; preparing a carbon mixture comprising the composite carbon particles and a third electrically conductive carbon material; and providing the carbon mixture as a coating on at least a portion of the surface of an electrode comprising active battery material for a lead-acid storage battery.
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Specification