Patent application number | Description | Published |
20090052117 | Carbonized Biopolymers and Carbonization Process - A carbon material suitable for the preparation of electrodes for electrochemical capacitors is obtained by single-stage carbonization of biopolymers with a large content of heteroatoms. Neither addition of an activating agent during carbonization nor subsequent gas phase activation is necessary. Several biopolymers which are available by extraction from seaweed are suitable precursors. Alternatively, the seaweed containing such biopolymers is carbonized directly. | 02-26-2009 |
20100033902 | COMPOSITE CONTAINING CARBONIZED BIOPOLYMERS AND CARBON NANOTUBES AND METHOD OF MAKING THE COMPOSITE - A composite suitable as a charge-storing material for electrochemical capacitors contains carbon nanotubes and a carbonaceous materiel. The carbonaceous material is the carbonization residue of a biopolymer or seaweed rich in heteroatoms. Wherein the carbonization residue of the biopolymer or seaweed is electrically conductive and has a heteroatom content as detected by XPS of at least 6%. | 02-11-2010 |
20100141044 | ELECTROCHEMICAL CAPACITOR WITH TWO CARBON ELECTRODES HAVING DIFFERENT CHARACTERISTICS IN AN AQUEOUS MEDIUM - An electrolytic capacitor ( | 06-10-2010 |
20140016247 | ELECTROCHEMICAL CAPACITOR - An electrochemical capacitor includes a first electrode connected to a positive terminal of a power source during the charge of the electrochemical capacitor and a second electrode connected to a negative terminal of a power source during the charge of the electrochemical capacitor. The first and the second electrodes each have a carbon material. The electrochemical capacitor further includes a porous separator to separate the first and second electrodes and to be impregnated with an almost neutral aqueous electrolyte situated between the two electrodes. The neutral aqueous electrolyte has a salt formed by a metallic cation and an anion. | 01-16-2014 |
20140325807 | METHOD FOR ASSEMBLING A HYBRID LITHIUM SUPERCAPACITOR - The invention relates to a method for developing a hybrid supercapacitor, said method including: at least a step of assembling together a negative electrode, made of at least one non-porous carbon material, and a positive electrode, made of at least one porous carbon material, said electrodes being separated from each other by means of at least one separator impregnated with a liquid electrolyte containing at least one lithium salt dissolved in at least one solvent; and then at least one first charging step, wherein said method is characterized in that: a) the lithium-ion concentration in the liquid electrolyte, before the first charging step, is greater than or equal to 1.6 mol/L; b) at least 50 wt % of the lithium salt of the liquid electrolyte contains a salt released from among LiTPSI and the derivatives there of; c) at least 80 vol % of the solvent of the liquid electrolyte contains a solvent selected from among cyclic alkyl carbonates, acyclic alkyl carbonates, lactones, esters, oxalenes, and the mixtures thereof, it being understood then at least 20 vol % of said solvent contains ethylene carbonate; d) the porous carbon material of the positive electrode is selected from among materials, the mean size of the pores of which is greater than 0.7 nm and which has a specific surface area of more than 700 m | 11-06-2014 |
20140332717 | METHOD OF PRODUCING A SILICON/CARBON COMPOSITE MATERIAL AND USE OF SUCH A MATERIAL - A method of producing a silicon/carbon composite material which includes the following successive steps: providing a silicon/polymer composite material from silicon particles and a carbonaceous polymer compound, precursor of carbon and able to be cross-linked, performing at least partial cross-linking of the polymer of the silicon/polymer composite material so as to obtain a cross-linked silicon/polymer composite material, the polymer having a cross-linking rate greater than or equal to 50% and, pyrolysing the cross-linked silicon/polymer composite material until said silicon/carbon composite material is obtained. | 11-13-2014 |