Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
High Performance Electrode Active Material And A Method For Preparation Thereof
Categories for this Invention
Technology: Production of Hydroquinone
by Oxidation of Phenol
Category: Chemistry & Chemical Analysis
Industry: Catalysts, Advanced material
Application: Photographic developer
Market: The global market size is expected to reach US$26.13 billion in 2024 and the latest industry analysis forecasts the market to expand at 4.8% CAGR and reach US$ 41.77 billion by 2034 end
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Problem Statement
- Hydroquinone is used in photographic development, polymerization inhibitors, and skin care products.
- High demand for catalysts for selective oxidative dehydrogenation leads to higher conversion rates.
- Iron phosphate (FeP04) is a popular catalyst for selective oxidative dehydrogenation and partial oxidation reactions.
- However, attempts to synthesize ordered mesoporous iron phosphate using cationic and anionic surfactants have been limited.
- Hydroquinone production involves selective hydroxylation of phenol using H2O2.
- The need for a catalyst with improved phenol conversion, hydroquinone production method, and enhanced selectivity is still significant.
Technology
Method for the preparation of MIP for electrode:
- Mix a first solution containing iron (Ill) nitrate nonahydrate and a second solution containing anhydrous diammonium hydrogen phosphate to obtain a first precipitate
- Suspend the precipitate in water and add HF to form a third solution
- Mix third solution with a predetermined amount of 1-hexadecyl-3-methylimidazolium chloride or cetyltrimethylammonium bromide in water to obtain fourth solution
- Stir the obtained fourth solution and heat it at a temperature of 50-70°C for a predetermined time period
- Add tetramethyl ammonium hydroxide (TMAOH) solution to the fourth solution to obtain a second precipitate
- Remove surfactants and purify the second precipitate
- Calcine the purified second precipitate at a temperature in the range of 250-300°C to obtain mesoporous FeP04
- Add mesoporous FePO4, acetylene black and poly (vinylidene difluoride) (PVDF) to a solvent to obtain a slurry
- Coat the slurry on a conductive substrate to obtain an electrode
Key Features / Value Proposition
Electrode for Electrochemical Applications
- Composed of mesoporous iron phosphate (MIP) active material.
- MIP has pore volume (0.30-0.48) cm3g-1.
- Surface area (110-200 m2g-1) or pore size distribution (PSD) 2.9-3.6 nm.
MIP Active Material Electrode
- Pore volume: 0.30-0.39 cm3g-1.
- Surface area: 110-130 m2g-1.
- Pore size distribution: 2.9-3.2 nm.
MIP Active Material Electrode Specifications
- Pore volume: 0.40 to 0.48 cm3g-1.
- Surface area: 180 to 200 m2 g-1.
- Pore size distribution (PSD): 3.3 to 3.6 nm.
- Electrode: A cathode with a first discharge capacity of 160 to 176 mAh g-1.
- Reversible capacity: At least 154 mAh g-1 at 40 cycles at C/10 (0.1C) cycles.
- Columbic efficiency: Up to 100%.
Fabricating an Electrode Method
- Add mesoporous iron phosphate (MIP), acetylene black, and poly(vinylidene difluoride) (PVDF) to a solvent.
- MIP ranges from 60 to 80 wt%, acetylene black from 10 to 30 wt%, and PVDF from 5 to 15 wt%.
- MIP has pore volume
(0.30 to 0.48 cm3g-1), surface area (110 to 200 m2g-1), and pore size distribution (PSD) 2.9 to 3.6 nm. - Coat the slurry on a conductive substrate with a specified loading of MIP active material
(1.5 to 2.5 mgcm-2).
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. Selvam P
Department of Chemistry
Intellectual Property
IITM IDF Ref. 1673
Patent No: IN 541895
Technology Readiness Level
TRL- 4
Experimentally validated in Lab