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Electrodos flexibles de óxido de grafeno mediante radiación láser

Resumen

Tipo:
Oferta Tecnológica
Referencia:
TOES20180713002
Publicado:
25/09/2018
Caducidad:
26/09/2019
Resumen:
Un centro de investigación español y una universidad han desarrollado un método para la fabricación de bajo coste de electrodos flexibles obtenidos a partir de procesamiento láser de películas de óxido de grafeno (GO). Este método permite obtener electrodos planares con baja resistencia eléctrica y elevada capacitancia por unidad de área, ideales para aplicaciones en sensores electroquímicos y almacenamiento de energía (supercondensadores). El tratamiento consiste en irradiar con luz visible una membrana de GO depositada sobre un soporte polimérico flexible, protegido en ambas caras con láminas transparentes a la luz visible. Su función es eliminar la reabsorción de oxígeno y evitar la reoxidación y pirólisis del rGO. Después del proceso, la zona irradiada se convierte en rGO, mientras que la zona no irradiada se mantiene intacta como GO. El centro de investigación busca socios industriales para licenciar la patente.

Details

Tittle:
Flexible graphene oxide electrodes by laser radiation
Summary:
A Spanish research institution together with a Romanian University have developed a method for the manufacture of low-cost flexible electrodes obtained from laser processing of graphene oxide (GO) films. Planar electrodes with low electrical resistance and high capacitance per unit area can be obtained, ideal for applications in electrochemical sensors and energy storage (supercapacitors).

Industrial partners are being sought to collaborate through a patent licence agreement.
Description:
Graphene-based materials present extraordinary electrical, mechanical and thermal properties, which make them special for applications in flexible electronics and electrochemical devices. The graphene oxide (GO) with its subsequent reduction (rGO) is the most used because of its lower cost and greater dispersion capacity. However, the re-oxidation and pyrolysis of the rGO when exposed to high temperatures is a drawback when manufacturing stable electrodes.
The present method is an alternative technique for obtaining a stable rGO by laser radiation. The treatment consists of irradiating with visible light a GO membrane deposited on a flexible polymeric support, protected on both sides with sheets transparent to visible light. Their function is to eliminate the oxygen reabsorption and to avoid the re-oxidation and pyrolysis of the rGO. After the process, the irradiated zone becomes rGO, while the non-irradiated zone remains intact as GO. This enables the design of electrodes with different patterns (see figures (a) and (b)).
The conditions of the treatment considerably reduce the resistance of the material and increase its electrochemical response (capacitance values of 120 mF / cm2). In addition, the rGO obtained has great mechanical stability and adhesion to the substrate.
The Spanish research centre and the Romanian University are searching for a Company interested in the development and commercialization of this method under a license agreement.The researchers involved in the technology have broad experience in the area and are open to collaborate with possible interested industrial partners.
Advantages and Innovations:
- Fabrication of flexible and stable electrodes with greater thickness than those obtained by current laser processes.

- Better performance in terms of resistance and capacitance per unit area than existing laser-based techniques.

- Versatile and cost effective method, suitable for both highly integrated and large-scale graphene-based device applications.

- More ecological process than current methods that use organic / toxic solvents or thermal treatments.

- Application in many fields: energy (supercapacitors, portable electronics, photovoltaic devices), sensors (chemical and biological sensors) and catalysis.

Stage of Development:
Available for demonstration
IPs:
Patent(s) applied for but not yet granted
CommeR Statunts Regarding IPR Status:
Spanish patent application filed, suitable for international extension

Partner sought

Type and Role of Partner Sought:
We are looking for industrial partners, from the sector of batteries and supercapacitors technology, companies interested in the use and exploitation of this fabrication method, under patent license.

Client

Type and Size of Client:
R&D Institution
Already Engaged in Trans-National Cooperation:
No
Languages Spoken:
English
Spanish

Keywords

Technology Keywords:
005006003 Laser Technology
05005 Micro y nanotecnología
04008003 Micro y nanotecnología relacionada con la energía
04001003 Storage of electricity, batteries