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Método para producir grafeno cristalino multicapa para baterías de litio-ión

Resumen

Tipo:
Oferta Tecnológica
Referencia:
TODE20151125001
Publicado:
26/11/2015
Caducidad:
26/11/2016
Resumen:
Una universidad alemana ha desarrollado un nuevo proceso para la producción en serie de grafenos cristalinos multicapa. Se trata de un método económico con bajo impacto ambiental que consiste en una exfoliación por microondas asistida por líquido iónico de grafito expandido. El material presenta un rendimiento mejorado en términos de almacenamiento a temperaturas inferiores a 0º C. La universidad busca licenciatarios industriales.

Details

Tittle:
Method to produce multilayer crystalline graphene for use in lithium-ion batteries
Summary:
A German university developed a new process for bulk production of high-quality multilayer crystalline grapheme. The method is inexpensive and has a low environmental impact. The material has improved storage performance at temperatures below 0°C. Industrial licensees are sought.
Description:
The unique physical and chemical properties arising from graphene may lead to remarkable advantages in the fields of electronics and energy storage devices. Its superior electronic conductivity and the single- to few-atoms thickness are particularly appealing for the use as anode material for lithium-ion batteries.

The electrochemical properties of graphene, that are relevant for its use in batteries, depend very much on its synthesis. Among different methods proposed so far, liquid phase exfoliation looked promising but the low yield of this technique limits its use to niche applications. On the other hand the reduction of graphene oxide, a low-cost method suitable for bulk production, results in a low-quality material which, in the lithium-ion battery field, is outperformed by the conventional graphite-based electrodes.

A German university developed and offers an innovative solution: The invention consists of an ionic liquid-assisted microwave exfoliation of expanded graphite. It allows the bulk production of high-quality multilayer crystalline graphene flakes. Used as anode material in lithium-ion batteries, at low temperatures (< 0°C) it shows higher lithium-ion storage performance than commercially available graphite.

The commercial potential of this method lies in the use of a low-cost and environmentally-friendly process for bulk production of high-quality multilayer crystalline graphene. Moreover, in terms of lithium-ion storage properties, the material has been proven to be comparable to the commercial graphite at temperature above 0°C, but it shows strongly improved performance at temperatures below 0°C.

Industrial licensees are sought.
Advantages and Innovations:
· Enhanced Li+ storage at low temperatures (< 0 °C) - higher than commercially available graphite
· High-quality graphene offers low first-cycle irreversible capacity
· A production yield of approximately 100%
· Suitable for mass production
· Cost effective, environmentally-safe process
Stage of Development:
Prototype available for demonstration
IPs:
Patent(s) applied for but not yet granted
CommeR Statunts Regarding IPR Status:
An international PCT-patent application has been filed

Partner sought

Type and Role of Partner Sought:
The university is seeking industrial partners active in graphene production for licensing this technology and to implement the process.
Partners could be from the fields of batteries, energy storage, mobility and material technology.

Client

Type and Size of Client:
University
Already Engaged in Trans-National Cooperation:
Si
Languages Spoken:
English
German

Keywords

Technology Keywords:
04001 Almacenamiento y transporte de energía
04001003 Storage of electricity, batteries
02007 Tecnología de materiales
02010 Tráfico, movilidad