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Method of depositing oxidized carbon-based microparticles and nanoparticles

A technology of micro-particles and carbon nanometers, applied in the field of capacitors, can solve the problems of reducing the evaporation temperature of solvents, toxicity, and unfavorable ecological and environmental protection

Active Publication Date: 2021-03-23
THALES SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This property lowers the evaporation temperature of the solvent, which also facilitates the evaporation of the solvent before deposition on the substrate, and hinders the fabrication of thick layers
In addition, the use of ethanol in solvents is toxic and not conducive to ecological protection

Method used

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  • Method of depositing oxidized carbon-based microparticles and nanoparticles
  • Method of depositing oxidized carbon-based microparticles and nanoparticles
  • Method of depositing oxidized carbon-based microparticles and nanoparticles

Examples

Experimental program
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Embodiment Construction

[0043] The following description shows several examples of implementation of the device of the invention: these examples are not limiting of the scope of the invention. These implementation examples illustrate the essential features of the invention as well as additional features relevant to the embodiment under consideration. For purposes of clarity, the same elements will have the same reference numbers in different drawings.

[0044] figure 1 is a schematic diagram of a device 3 for carrying out the deposition of nano / micro particles according to the method of the present invention;

[0045] The device 3 comprises a nozzle 4 , a water tank 5 containing a suspension of nano / micro particles and a source 6 of spray gas. The nano / microparticles include oxidized graphene particles, and in particular embodiments of the invention may include oxidized carbon nanotubes, oxidized carbon nanofibers, oxidized carbon nanorods, oxidized carbon nanohorns, and oxidized carbon onion. Ot...

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Abstract

The present invention relates to the field of elements for storing energy and relates to a method for depositing nano / micro particles comprising at least graphene sheets on a support (8), said method comprising the steps of: oxidizing at least graphene sheets; the nano / microparticles are suspended in at least one solution comprising at least water as a solvent; each suspension is sprayed onto a substrate (15) through hydrodynamic instability; the substrate (15) is heated during each spraying to a temperature less than or equal to one and a half times the boiling point of each of the aforementioned solutions and less than or equal to 200° C., in order to promote complete evaporation of the solvent from each part of each suspension sprayed on the substrate (15); after spraying, The deposit (1) is reheated to a temperature sufficient to deoxidize at least oxidized graphene present in the deposit (1) and greater than the temperature of the substrate (15) during the deposition step.

Description

technical field [0001] The invention relates to elements for storing energy, in particular capacitors. The capacitors involved are also called "supercapacitors" and are characterized by a greater energy density than dielectric capacitors and a higher power density than batteries. Background technique [0002] Supercapacitors typically consist of two porous electrodes permeated with electrolytes (eg, ionic salts in common organic solutions, quaternary ammonium salts such as tetraethylammonium tetrafluoroborate in acetonitrile or propylene carbonate). These electrodes are usually separated by an insulating and porous membrane that allows the ions in the electrolyte to circulate. [0003] The first supercapacitors, known as "EDLCs" (Electrochemical Double Layer Capacitors), were based on the same principle as conventional capacitors with polarizable electrodes and an electrolyte acting as dielectric. Its capacitance is derived from the double layer arrangement of ions and ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/28H01G11/36H01G11/86
CPCH01G11/28H01G11/36H01G11/86B82Y30/00Y02E60/13C01B32/23B05D1/02B05D3/007C01B2204/22H01G11/24
Inventor P·邦达瓦利G·波尼翁C·加林多
Owner THALES SA