Double layer capacitor with porous carbon electrodes and...

H - Electricity – 01 – G

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H01G 9/155 (2006.01)

Patent

CA 2237679

A double electric layer capacitor comprising at least two electrodes (4, 5), substantially of porous carbon, the electrodes being substantially saturated with electrolyte and separated by means of a porous separator (6) with ionic conductivity. The capacitor is especially characterized in that the electrodes (4, 5) in the form of a porous structure are made of materials with a carbon content exceeding 95 % mass and a pore volume exceeding 55 % of the electrode material volume, a certain part of the pores having a size less than 10 nm.

L'invention concerne un condensateur électrique double-couche comprenant au moins deux électrodes (4, 5) sensiblement constituées de carbone poreux, les électrodes étant essentiellement saturées en électrolyte et séparées par un séparateur poreux (6) présentant une conductivité ionique. Le condensateur est caractérisé en particulier par le fait que les électrodes (4, 5), se présentant sous la forme d'une structure poreuse, sont constituées de matériaux ayant une teneur en carbone dépassant 95 % de la masse et un volume de pores dépassant 55 % du volume du matériau d'électrode, une certaine proportion des pores ayant une taille inférieure à 10 nm.

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