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Carbonated electrode composition for a supercapacitor, electrode, its fabrication process and cell thereof

A technology of supercapacitors and compositions, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, electric vehicles, etc.

Inactive Publication Date: 2013-07-10
HUTCHINSON SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] A major drawback of this hydrophobic binder system is that it dissolves in the water of certain aqueous electrolytes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0042] The carbon powder is referred to as "C1" carbon powder, and the block prepared according to the method described in the document WO-A1-2009 / 125094 in the name of the applicant is obtained by ball milling at 500 rpm for 3 minutes.

[0043] According to the following "Super-PLi" carbon black (Timcal), "Mowiol 18-88", polyvinyl alcohol (PVA), polyacrylic acid (PAA), and carboxymethylcellulose (CMC) composition, using ball milling, in Various mixtures prepared in water. Add 0.05% by weight of defoamer "Byk 24". PAA enables catalytic crosslinking of PVA and CMC by dehydration.

[0044] Example 1 Example 2 Example 3 Example 4 Carbon C1 84.2% 84.5% 81.9% 81.9% Super PLi carbon black 10.5% 10.6% 10.2% 10.2% PVA 4.5% 4.5% 7.2% 6.4% PAAA 0.5% 0.45% 0.7% 1.5% CMC 0.3% solid content 40% 40% 40% 40%

[0045] The resulting dispersions containing these compositions were then applied to stainless steel...

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PUM

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Abstract

A carbonaceous composition usable to constitute a supercapacitor cell electrode, a porous electrode usable to equip such a cell, a process for manufacturing this electrode and one such cell incorporating at least one such electrode, for example in order to equip an electric vehicle. This composition is usable to be in contact with an aqueous ionic electrolyte, is based on a carbonaceous powder and comprises a hydrophilic binder-forming system. The system may include between 3% and 10% by weight a first crosslinked polymer having a number-average molecular weight Mn of greater than 1000 g / mol and having alcohol groups, and between 0.3% and 3% by weight a second polymer of at least one acid and which has a pKa of between 0 and 6 and a number-average molecular weight Mn of greater than 500 g / mol, the first polymer being crosslinked thermally in the presence of the second polymer.

Description

technical field [0001] The present invention relates to a carbonaceous composition suitable for constituting an electrode of a supercapacitor battery, a porous electrode suitable for assembly on such a battery, a method for producing said electrode and said battery containing at least one such electrode method. The invention is particularly, but not limited to, applied to supercapacitors suitable for fitting on electric vehicles. Background technique [0002] Supercapacitors are electrical energy storage systems that are useful in applications that require converting electrical energy into high energy. Their ability to charge and discharge quickly, and their higher service life compared to high-energy batteries, ensure that they are an option in many applications. Supercapacitors generally consist of two conductive, porous electrodes with high specific surface areas, which are immersed in an ionic electrolyte and separated by an insulating film, also known as a "separator"...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/86C25B11/065
CPCY02E60/13H01G11/38H01G11/86H01G11/48Y02T10/70H01G11/32
Inventor 布鲁诺·杜福尔大卫·埃梅-佩洛特玛丽·迪厄多内菲利普·索恩塔格
Owner HUTCHINSON SA
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