LCD-supported Thin Film Graphene Electrodes

Technology: LCD-supported thin film graphene electrodes;

Industry: Sensors, Environmental Engineering;

Applications: Advanced Materials, Opto-electronic device;

Market: The global graphite electrode market is projected to $12.79B by 2032, at a CAGR of 10.3% during 2022-2032.

Generally, formation of graphene thin film electrodes involve coating of graphene oxide (GO) on to the conductive support matrix & subsequent reduction through electrochemical approach.
Conventional patent and non-patent literatures have discussed supporting matrices which required binders or linkers to enhance the connectivity between graphene and supporting matrix.
However, said prior arts do not disclosed the method of developing an electrode with a conductive thin film graphene based layer without any binder or linker.
Hence, there is a need to mitigate above challenges & provide efficient solution.

Present Patent discloses a binder-free, linker-free thin film electrode for use in a cell for removing contaminants from water.
Further, subject patent discloses a method of fabricating a binder-free, linker-free thin film electrode for use in a cell for removing contaminants from water.
The electrode is being fabricated from a liquid crystal display (LCD) touch screen panel, wherein the electrode is configured with a conductive thin film graphene based layer.
Patented Method is projected in the flowchart shown hereinbelow:
In discussion with the above process, a thin film coating over the substrate is obtained without the addition of binders or linkers.
Coating thickness is in range of 50-100nm.
Said LCD touch panel matrix assembly is configured with multiple layers including a top conductive layer, a second black matrix layer, a third ITO layer, and a bottom glass layer, shown in Fig. 2.
Furthermore, a method of treating contaminated water using said electrode is disclosed.

Technical Perspective:

Simple and Facile way for the formation of cost-effective binder/linker free thin film graphene electrode.
Conductive polymeric dyes present on the surface of the LCD enhances the attachment of graphene oxide(GO) & act as electrochemical platform for the electrochemical reduction of GO. (Refer Figs. 3A & 3B)
GO was drop casted onto LCD support matrix and dried to form uniform thin film.
The eco-friendly electrode is electrochemically reduced & is characterized by amine, amide or aromatic C-H bonds between the polymeric dye layer and the graphene.

Industrial Perspective:

Provides a sensor for the electrochemical detection of contaminants in water.
Facilitates a cost-effective sensor & also photovoltaic cell applications.

Prof. Indumathi M Nambi,

Department of Civil Engineering.

TRL- 4

Technology validated in Lab

Technology Transfer