Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
An Integrated CDI Electrode
Categories for this Invention
Technology: Integrated CDI Electrode;
Industry: Chemical Industry, Grey Water Management Industries; Application: Environment Engineering, Waste water treatment;
Market: The global capacitive deionization market is projected at a CAGR of 5.4% during (2023-2026)
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Problem Statement
- In the present era, the availability of clean potable water at affordable cost is a growing challenge for mankind. To meet the growing demand of drinking water, many materials & methods are used, but having difficulties due to expensive process/implementation, & consumption of high energy.
- There are many conventional methods discussed herein does not provide solutions as discussed in the present invention. Hence, there is a need to address above issues.
Technology
- Present invention describes the preparation of an electrode assembly for capacitive deionization (CDI) comprising:
- One electrode made of chemically-linked reduced graphene oxide-cation exchange resins molecular constructs synthesized by in-situ polymerization of styrene & reduced graphene oxide (RGO) followed by functionalization of reduced graphene oxide@polystyrene(RGO-PS) composite with sulfonate and/or carboxylate moiety.
- One electrode made of chemically-linked reduced graphene oxide-anion exchange resins molecular constructs synthesized by in-situ polymerization of styrene & reduced graphene oxide (RGO) followed by functionalization of reduced graphene oxide@polystyrene(RGO-PS) composite with amine moiety.
- The electro-desorption during CDI does not lead to readsorption & consequent reduction of adsorption capacity of the overall system.
- The covalent construct is mixed with additives includes carbon nanotubes (CNTs), fullerenes and carbon fibers to enhance the performance.
- The electrodes are used for removing salts from blackish water.
Key Features / Value Proposition
Technical Perspective & Industrial Perspective:
Types of Resins used:
- The resin selected from the group of polystyrene, polysulphone, poly-acrylic acid, polyacrylamide, poly(methylmethacrylate), polymide, polyethylene terephthalate, polyethylene grafted maleic anhydride, polypropylene, poly(vinyl alcohol), poly(vinyl chloride) & polyethylene vinyl acetate & combination thereof.
Types of Electrode material/ two-dimensional materials used:
- The electrode material is selected from the group of reduced graphene oxide, molybdenum disulfide(MoS2), tungsten diselenide(WSe2), tungsten disulfide(WS2) and combination thereof.
Removing Cations & Anions and positive-negative charges: The electrodes remove
- cation of different charge(including Fe3+, Mg2+and Na+),
- anions of different charge (including Cl-,NO3-, F-, SO42-, arsenite & arsenate ions,
- positive & negative charged ions are removed from impure water.
Efficiency:
- The assembly is used along with other deionization & purification methods to enhance removal efficiency.
- Cost-effective, provides single solution & applicable in the domestic/Industrialist area.
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. Pradeep T
Department of Chemistry,
Intellectual Property
- IITM IDF Ref. 1637;
- Patent No:345270;
- PCT Application No. PCT/IN2018/050894
- US Application No. US 16/958,971
Technology Readiness Level
TRL-4
Proof of Concept ready, tested in lab.