ELECTROCHEMICAL CAPACITOR WITH TWO CARBON ELECTRODES HAVING DIFFERENT CHARACTERISTICS IN AN AQUEOUS MEDIUM

摘要

#CMT# #/CMT# The capacitor (1) has an aqueous electrolyte (4) situated at an interface of two carbon electrodes (2, 3), where the aqueous electrolyte is an acid or base aqueous solution containing sulfuric acid. The electrode (2) has a carbon surface with an atomic operating rate multiplied by a factor equal to 2, with respect to an atomic operating rate of a carbon surface of the electrode (3), where the electrodes contain respective Super50(RTM: activated carbon) and Maxsorb(RTM: activated carbon). A porous separator (5) is arranged in the electrolyte between the electrodes. #CMT# : #/CMT# The activated carbon of the electrode (2) is oxidized by an acid solution i.e. nitric acid aqueous solution. The carbon surfaces are processed by nitrogenous, sulfurated, oxygenated and phosphorated functions. Independent claims are also included for the following: (1) a method of manufacturing an electrolytic capacitor (2) an electric circuit comprising an electrolytic capacitor. #CMT#USE : #/CMT# Electrolytic capacitor for storing an electric energy obtained from a separation of a charged space and an oxidation-reduction reaction, in an electric circuit, stationary system i.e. electric generating set, automobile, aircraft, portable electronic system and railway transport system (all claimed) e.g. tramway and train. #CMT#ADVANTAGE : #/CMT# The aqueous electrolyte provides high operating voltage and capacity in an aqueous medium, thus ensuring high delivered power, high energy density and reliable resistance of the capacitor. The utilization of the aqueous solution reduces the cost of the capacitor, and reduces the constraints during implementation of the capacitor. The configuration of the capacitor avoids decomposition of aqueous electrolyte with the emission of noxious and explosive gases such as methane, ethane, dioxygen, dihydrogen, carbon monoxide and carbon dioxide, during charging and discharging of the capacitor. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic circuit representation of an electrolytic capacitor during charging. 1 : Electrolytic capacitor 2, 3 : Carbon electrodes 4 : Aqueous electrolyte 5 : Porous separator 6 : Current source.