Sulphur-modified monolithic porous carbon-based material, process for the preparation thereof and uses thereof in the storage and release of energy
First Claim
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1. Process for the preparation of a sulphur-modified monolithic porous carbon-based material, comprising at least the following stages:
- (i) drying of a gel comprising at least one hydrophilic polymer of polyhydroxybenzene/formaldehyde type,(ii) pyrolysis of the material obtained during stage (i),(iii) impregnation of the material resulting from stage (ii) with a strong sulphur-based acid,(iv) heat treatment at a temperature of between 300 and 500°
C., of the sulphur-modified material obtained at the end of stage (iii),the said process not comprising a hydrogenation stage.
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Abstract
A subject-matter of the invention is a novel process for the preparation of sulphur-modified monolithic porous carbon-based materials by impregnation with a strong sulphur-based acid, the materials capable of being obtained according to this process and the use of these materials with improved supercapacitance properties to produce electrodes intended for energy storage systems. Electrodes composed of sulphur-modified monolithic porous carbon-based materials according to the invention and lithium batteries and supercapacitors having such electrodes also form part of the invention.
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9 Claims
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1. Process for the preparation of a sulphur-modified monolithic porous carbon-based material, comprising at least the following stages:
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(i) drying of a gel comprising at least one hydrophilic polymer of polyhydroxybenzene/formaldehyde type, (ii) pyrolysis of the material obtained during stage (i), (iii) impregnation of the material resulting from stage (ii) with a strong sulphur-based acid, (iv) heat treatment at a temperature of between 300 and 500°
C., of the sulphur-modified material obtained at the end of stage (iii),the said process not comprising a hydrogenation stage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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