Patent ID: 9570243
Date: 2017-02-14
CPC Classifications: H01G,Y02E,Y02T

Claim:
1. Carbonaceous composition usable to constitute a supercapacitor electrode in contact with an aqueous ionic electrolyte, the composition being based on a carbonaceous powder capable of storing and releasing electrical energy and comprising a hydrophilic binder-forming system, wherein said system comprises: according to a weight fraction in the composition of between 3% and 10%, at least one first crosslinked polymer having a number-average molecular weight Mn of greater than 1000 g/mol and comprising alcohol groups, and according to a weight fraction in the composition of between 0.3% and 3%, at least one 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, said at least one first polymer being crosslinked thermally in the presence of said at least one second polymer.