A composition for organogel and its pyrolysis product and its preparation method, as well as an electrode formed from the pyrolysis product and a supercapacitor comprising the electrode

Abstract

The present invention relates to a non-crosslinked gelled carbon-based composition and a pyrolyzed composition, which respectively form an aqueous polymer gel and its pyrolysis product in the form of a porous carbon. The invention also relates to a method for its preparation, and to a porous carbon electrode formed from a pyrolytic composition, and to a supercapacitor comprising said electrode. The non-crosslinked gelled carbon-based composition (G2) is based on a resin at least partially derived from (poly)phenol R and (poly)oxymethylene F and comprises at least one water-soluble cationic polyelectrolyte P. According to the invention, the composition forms a shear thinning physical gel. A pyrolyzed carbonaceous composition comprising monolithic carbon according to the present invention, which is the coating, crosslinking, drying and thermal decomposition product of said non-crosslinked gelled carbon-based composition, mainly microporous The monolithic carbon can form a supercapacitor electrode with a thickness of less than 1mm.

Description

technical field [0001] The present invention relates to a non-crosslinked gelled carbon-based composition and a pyrolyzed composition, which respectively form an organic polymer gel and its pyrolyzed product in the form of a porous carbon, and to processes for their preparation, It also relates to a porous carbon electrode comprising the pyrolysis composition and a supercapacitor comprising the electrode. The invention is especially suitable for supercapacitors suitable for equipping electric vehicles. Background technique [0002] Supercapacitor is a kind of electric energy storage system, which is especially beneficial to the field that needs to transmit high-power electric energy. [0003] Their ability to charge and discharge quickly and have a longer service life than high-power batteries make them the most promising choice for many applications. A supercapacitor generally consists of a combination of two conductive porous electrodes with a large specific surface area...

AI Technical Summary

Problems solved by technology

This method, has the following disadvantages: the use of binders makes the system heavy and not active for energy storage

In fact, in order to obtain carbon electrodes with the aforementioned thickness less than or equal to 0.5 mm, these methods must include a final polishing / rectification step, which has the disadvantages of being expensive, difficult to implement and causing considerable material loss

A major disadvantage of the irreversible chemical gel described herein is its very low viscosity, which makes it completely impossible to be coated with a thickness of less than 2mm

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