PostDoc

Viney dixit

Postdoctoral Fellow

Department of Energy Science & Engineering, IIT Bombay

Research Area: A lot of materials have been studied for solid state hydrogen storage, among them, metal hydrides have attracted considerable attention due to their high volumetric density. Metal hydride with BCC (body centred cubic) structure absorb around 3 wt.% of hydrogen at room temperature. Problem with these materials is that they show two plateaus in their pressure composition isotherm. The first plateau is due to the formation of monohydride, and second plateau is due to the formation of dihydride phase. The first plateau takes place at very low pressure (less than atmospheric pressure) therefore it does not contribute in reversible storage. Hence it is important to study the thermodynamics of these kind of alloys. For this investigation Ti-V-Cr alloys have been selected and effect of the Titanium/Vanadium (Ti/V) ratio on hydrogenation kinetics has been reported. Experimental techniques such Sieverts type apparatus, X-ray diffractometer, Scanning electron microscope, Transmission electron microscope and Arc-melting are being used to accomplish the goal of this project.

Students

Meenakshi Sahu

Research Scholar, Department of Energy Science and Engineering

Ph. D.

Research Area: Fabrication of CZTX (S, Se &Te) based high-efficiency solution-processed solar cells and to characterize its electronic behavior. Using colloidal nanoparticle inks, solar cells can be fabricated from solution-based (non-vacuum) method such as spin-coating and doctor blading.

More Information: The fabrication of CZTX absorber thin film involves three steps process: First step preparation of CZTX (X= S, Se, and Te) nanopowder using dry ball milling process. the second step is synthesized powder used for ink formation using different solvents, binder, and surfactants. Formulated ink despite by coating process to the prepared thin film. With the obtained absorber layer, the remaining layer of the device can be deposited, typically CdS by CBD and ZnO by Spin coating. Finally, grids are deposited on the top face of the device. Different characterization techniques are used for ink as well as the deposited thin film.

Abhishek Patel

Research Scholar, Department of Energy Science and Engineering

MSc-PhD

Research Area: Department of Energy Science and Engineering

More Information: In metal hydrides the hydrogen could be stored in a compact way at low temperature and pressure thus making this technique particularly safe. However, in order to be used commercially, the cost of metal hydrides has to be reduced. The aim of this study is to study the effect of doping with transition metals such as Zr on hydrogenation characteristics of TiFe alloy, using industrial grade Fe and Ti as a raw material. The ultimate objective will be to optimize the chemical composition & synthesis parameters of industrial methods in order to have a TiFe alloy that will absorb hydrogen quickly and reversibly at low temperature.

Animesh Hajari

Research Scholar, Department of Energy Science and Engineering

MSc-Ph.D

Research Area: Research Scholar, Department of Energy Science and Engineering

More Information: Complex hydrides are emerging as a promising solid hydrogen carrier, particularly for power generation in portable devices that employ proton-exchange membrane fuel cells. Ammonia Borane (AB) one of the promising hydrogen storage material, however the major challenges are regeneration and unwanted by products. The systematic study of a transitional metal-catalyzed alcoholysis of AB and regeneration of AB from intermediate of the reaction is under process.

Vinit Kumar

M.Sc.-Ph.D, DESE, IIT Bombay

M.Sc.-Ph.D

Research Area: Department of Energy Science and Engineering

More Information: Bimetallic alloys are well known for hydrogen storage purpose due to their desirable operating temperature pressure conditions for hydrogenation and dehydrogenation process, but the drawback associated are air contamination and low hydrogen storage capacity. My goal is to enhance the storage capacity of these alloys by making different models using density Functional theory.

Bharati Patro

B.Sc. Physics, Mumbai University

M.Sc. Physics, Mumbai University

Research Area: For low cost thin film solar cell application 1. Microwave-assisted solvothermal synthesis and characterization of Cu2ZnSnS4 (CZTS) 2. CZTS thin film preparation using cost-effective, non-toxic solvents 3. Detailed CZTS grain growth study 4. CdS thin film deposition for better surface coverage and thickness control.

More Information: For low cost thin film solar cell application 1. Microwave-assisted solvothermal synthesis and characterization of Cu2ZnSnS4 (CZTS) 2. CZTS thin film preparation using cost-effective, non-toxic solvents 3. Detailed CZTS grain growth study 4. CdS thin film deposition for better surface coverage and thickness control.

Mahvash Afzal

Mechanical Engg, ZHCET AMU

ZHCET,AMU

Research Area: Ph.D, DESE, IIT Bombay, The research work is focused upon the design and thermal management of a metal hydride based hydrogen storage system. The objective of this study is to design a metal hydride based hydrogen storage system which can be used to power fuel cell at an off-grid location.

More Information: The research work is focused upon the design and thermal management of a metal hydride based hydrogen storage system. The objective of this study is to design a metal hydride based hydrogen storage system which can be used to power fuel cell at an off-grid location.

Saurabh Tiwari

B.Tech. Mechanical, Govt. Eng. College Bikaner

M. Tech., IIT Roorkee

Research Area: Design, simulations and experimental study of hydrogen storage based thermal storage system

More Information: Design, simulations and experimental study of hydrogen storage based thermal storage system. To study heat transfer phenomenon and different methods to improve heat transfer inside metal hydride bed. To develop a metal hydride based thermal storage system, which is cheaper and more efficient than other methods of thermal storage. To develop a numerical model for analyzing and for optimizing different properties of metal hydride bed.

Aashish Malik

B.Tech. Sri VenkateshwaraCollege ofEngg. & Tech.

M. Tech., DESE, IIT Bombay

Research Area: M. Tech., DESE, IIT Bombay ,The project involves the design of a 50 kg hydrogen storage metal hydride system.Modelling and simulations for a suitable heat exchange option for the system is performed. The future work involves the development of an actual system based on the design.

More Information: The project involves the design of a 50 kg hydrogen storage metal hydride system.Modelling and simulations for a suitable heat exchange option for the system is performed. The future work involves the development of an actual system based on the design.

Vishnulal K. S.

B.Sc. Chemistry, Christ College Irijalakuda, Thrissur

M.Sc. DESE,IIT-Bombay

Research Area: M.Sc. DESE,IIT-Bombay

More Information: My project mainly concentrated on metal hydride based storage system for vehicular applications of hydrogen. This includes the identification of suitable metal hydride for storing hydrogen and it's characterization. In my project I have prepared 4 different composition of Cerium (Ce), Nickel (Ni) and Zirconium (Zr) alloys using arc melting method. Experimental works include the pressure composition isotherm (PCI) and kinetic study of the prepared metal alloys using Sieverts apparatus.

Mohit Padhee

Mechanical Engg. V.S. Sai University of Tech. Odisha

M. Tech., DESE, IIT Bombay

Research Area: Design of metal hydride-based hydrogen storage tank for vehicular applications.

More Information: Design of metal hydride-based hydrogen storage tank for vehicular applications. The project work includes selection of metal hydride with high volumetric and gravimetric capacities suitable at operating conditions of hydrogen-based fuel cell vehicles; designing a 100 kWh capacity hydrogen storage tank, its modeling and simulation using COMSOL Multiphysics V5.3a software tool and optimization of thermal management performance parameters for enhanced performance and kinetics; identification of auxiliary components required in the tank-PEMFC system; feasibility study of the tank-PEMFC system at vehicle level based on US DOE targets.

Md. Meraj Alam

Ph.D., DESE, IIT Bombay

Ph.D., DESE, IIT Bombay

Research Area: Effect of the Addition of Rare Earths to TiFe alloys

More Information: Effect of the Addition of Rare Earths to TiFe alloys Currently pursuing a PhD in the field of Energy and Material Sciences as a cotutelle student leading to a Joint Doctorate from IIT Bombay (India) and Université du Québec à Trois-Rivières (UQTR, Canada). Doctoral research is being carried out on metal hydride from fundamental perspectives to gain a broader understanding of metal-hydrogen interaction. The systems that are being investigated are rare earth added TiFe alloys for ease in activation. Part of the work was presented at the Canadian Association of Physicists Congress (CAP Congress- 2018), which was recognized for the best student poster award.

Ankita Bishnoi

M.Sc., DESE, IIT Bombay

M.Sc.-Ph.D., DESE, IIT Bombay

Research Area: Metal hydride are known to have good hydrogen storage properties, but the major limitation in metal hydride which limit it for using it for vehicular application is poor hydrogen storage capacity and high cost of alloys. My goal is to increase the hydrogen storage capacity by alloying with transition elements and study the pressure composition temperature (PCT) isotherm, kinetics and thermodynamic study of alloys.

More Information: Metal hydride are known to have good hydrogen storage properties, but the major limitation in metal hydride which limit it for using it for vehicular application is poor hydrogen storage capacity and high cost of alloys. My goal is to increase the hydrogen storage capacity by alloying with transition elements and study the pressure composition temperature (PCT) isotherm, kinetics and thermodynamic study of alloys.

Bipin Sharma

M. Tech, DESE, IIT Bombay

M. Tech, DESE, IIT Bombay

Research Area: Development of metal hydride based thermal energy storage system

More Information: Development of metal hydride based thermal energy storage system The main objective of this project is to devise a thermal energy storage system which uses metal hydride to store/release heat. The system can operate at around 400 degree Celsius temperature. The system uses a high-temperature metal hydride and a low-temperature metal hydride. The project encompasses the characterization of metal hydride, gas sorption measurement using Sieverts method. The simulation and optimization of a designed system, as well as the experimental study of the system, developed.

Binayak Roy

Research Scholar, DESE, IIT Bombay

MSc.-Ph.D, DESE, IIT Bombay

Research Area: Ammonia borane (NH3BH3) is a Lewis acid base adduct of ammonia (NH3) and borane (BH3) moieties, formed through the interaction of NH3 and B2H6. The decomposition of AB precedes at a temperature above 100°C which results in the release of hydrogen gas. The tendency of AB to release H2 upon heating, combined with its high theoretical gravimetric hydrogen storage capacity (19.6%) makes AB a potential choice for on-board hydrogen storage applications. However, the dehydrogenation process of AB is hindered by several limitations e.g. release of harmful by-products (ammonia, diborane and borazine) and non-regenerability of the post dehydrogenated solid by-product. Here at the HPV lab, we work on the synthesis of various mesoporous support materials and inorganic compounds to understand their effect in AB hydrogen storage and the overall boron chemistry. Our work on the AB dehydrogenation has delivered some impactful research on the correlation of kinetic, mechanistic and crystalline properties of AB and reported new avenues for homonuclear dehydrogenation processes. Currently we are trying to improve the scenario of AB regeneration from the post dehydrogenated product by studying different regeneration routes which heavily relies on inorganic and materials chemistry.

More Information: Ammonia borane (NH3BH3) is a Lewis acid base adduct of ammonia (NH3) and borane (BH3) moieties, formed through the interaction of NH3 and B2H6. The decomposition of AB precedes at a temperature above 100°C which results in the release of hydrogen gas. The tendency of AB to release H2 upon heating, combined with its high theoretical gravimetric hydrogen storage capacity (19.6%) makes AB a potential choice for on-board hydrogen storage applications. However, the dehydrogenation process of AB is hindered by several limitations e.g. release of harmful by-products (ammonia, diborane and borazine) and non-regenerability of the post dehydrogenated solid by-product. Here at the HPV lab, we work on the synthesis of various mesoporous support materials and inorganic compounds to understand their effect in AB hydrogen storage and the overall boron chemistry. Our work on the AB dehydrogenation has delivered some impactful research on the correlation of kinetic, mechanistic and crystalline properties of AB and reported new avenues for homonuclear dehydrogenation processes. Currently we are trying to improve the scenario of AB regeneration from the post dehydrogenated product by studying different regeneration routes which heavily relies on inorganic and materials chemistry.

Alumni

Dr. Aneesh C. Gangal

Principal, Sindhudurg Shikshan Prasarak Mandal’s College of Engineering, Kankavli, Maharashtra

Ph. D.(2007-2012)

Research Area: Dr. Aneesh worked on thermal decomposition and kinetic studies of ammonia borane, which is a chemical hydride and its use for hydrogen storage. He studied the effect of different additives like zeolites, chabazite, Si nanoparticles, etc. on the decomposition temperature, foaming and volume expansion, kinetics, etc. A detailed mechanism based kinetics study was done, wherein he correlated the different kinetic model with the mechanism and came up with a kinetic model equation. He had several publications and a patent titled Composition and Method of Generation of Hydrogen by Thermal Decomposition of Ammonia Borane (AB) using Silicon Nanoparticles as Catalyst in the year 2011 to his credit.

More Information: Dr. Aneesh worked on thermal decomposition and kinetic studies of ammonia borane, which is a chemical hydride and its use for hydrogen storage. He studied the effect of different additives like zeolites, chabazite, Si nanoparticles, etc. on the decomposition temperature, foaming and volume expansion, kinetics, etc. A detailed mechanism based kinetics study was done, wherein he correlated the different kinetic model with the mechanism and came up with a kinetic model equation. He had several publications and a patent titled Composition and Method of Generation of Hydrogen by Thermal Decomposition of Ammonia Borane (AB) using Silicon Nanoparticles as Catalyst in the year 2011 to his credit.

Dr. Devendra Pareek

Scientist, Carl von Ossietzky University of Oldenburg, Germany

Ph. D. (2012-2016)

Research Area: Dr. Devendra synthesized family of chalcogenides based PV materials which were prepared from non-toxic, earth abundant elements and using low cost synthesis route. He prepared CZTS, CZTSe and CZTTe using ball milling. He optimized several synthesis parameters including milling duration, ball to powder ratio, solvent concentration for wet milling; annealing temperatureetc.. Accordingly, with the optimized set of conditions he was able to demonstrate a single phase material which is hard to get due to very narrow region in phase diagram. He synthesized a novel material for the first time CZTTe and have a patent on it.

More Information: Dr. Devendra synthesized family of chalcogenides based PV materials which were prepared from non-toxic, earth abundant elements and using low cost synthesis route. He prepared CZTS, CZTSe and CZTTe using ball milling. He optimized several synthesis parameters including milling duration, ball to powder ratio, solvent concentration for wet milling; annealing temperatureetc.. Accordingly, with the optimized set of conditions he was able to demonstrate a single phase material which is hard to get due to very narrow region in phase diagram. He synthesized a novel material for the first time CZTTe and have a patent on it.

Dr. Joydev Manna

Postdoctoral Researcher, Indian Institute of Technology Madras (IITM)

M. Sc.- Ph. D. (2008-2015)

Research Area: Dr. Joydev worked on several complex hydrides including LiBH4, NaBH4, etc. However, his major focus was on hydrolysis of sodium borohydride in the presence of Co based catalysts. Effect of synthesis conditions of Co-B catalyst including Co2+/BH4- ratio, temperature, pH, etc. were studied for its activity. In order to address the issue of agglomeration different support materials like silica gel, bentonite, etc. were used and their impact on dehydrogenation was studied. This work was referred in Green Car Congress in the year 2015 as Newheterogeneous acid catalyst shows high activity in release of hydrogen from sodium borohydride; lowest activation energy yet reported.. He also holds a patent titled Cobalt Boride Catalysts Impregnated on Aluminium Phosphate For Hydrolysis of Metal Borohydrides in the year 2014 to his credit.

More Information: Dr. Joydev worked on several complex hydrides including LiBH4, NaBH4, etc. However, his major focus was on hydrolysis of sodium borohydride in the presence of Co based catalysts. Effect of synthesis conditions of Co-B catalyst including Co2+/BH4- ratio, temperature, pH, etc. were studied for its activity. In order to address the issue of agglomeration different support materials like silica gel, bentonite, etc. were used and their impact on dehydrogenation was studied. This work was referred in Green Car Congress in the year 2015 as Newheterogeneous acid catalyst shows high activity in release of hydrogen from sodium borohydride; lowest activation energy yet reported.. He also holds a patent titled Cobalt Boride Catalysts Impregnated on Aluminium Phosphate For Hydrolysis of Metal Borohydrides in the year 2014 to his credit.

Dr. Sridhar Dalai

Assistant Professor, School of Engineering and Applied Science, Ahmedabad University

Ph. D.

Research Area: Dr. Sridhar worked on synthesis, characterization and utilization of hollow glass microspheres for hydrogen storage. He used different inexpensive raw materials(glasses) in fact waste laboratory glass frit for synthesis of HGMs and also optimized the pore size, particle size, feed flow rate, wall thickness and blowing agent concentration to get controlled properties of HGMs. In order to improve the thermal conductivity of these HGMs, he doped them with different transition metals including Co, Zn, Mg, Fe, etc. The best hydrogen storage capacity he obtained was 3.31 wt%.

More Information: Dr. Sridhar worked on synthesis, characterization and utilization of hollow glass microspheres for hydrogen storage. He used different inexpensive raw materials(glasses) in fact waste laboratory glass frit for synthesis of HGMs and also optimized the pore size, particle size, feed flow rate, wall thickness and blowing agent concentration to get controlled properties of HGMs. In order to improve the thermal conductivity of these HGMs, he doped them with different transition metals including Co, Zn, Mg, Fe, etc. The best hydrogen storage capacity he obtained was 3.31 wt%.

Dr. Pragya Shrivastava

Post Doctoral Researcher, NCL Pune

Ph. D.

Research Area: Dr. Pragya prepared various nano and micro bioactive glasses using non-freeze drying and freeze drying method. Several Nano bioactive glass (NBG) and composites, porous 3D scaffolds of NBG and the composites were synthesized and studies for their bio-compatibilities. These couples were shown to support the growth of bone cells leading to new bone formation. She also conducted in vivo studies and observed bone healing. NBG was also tested for their use as drug loading systems. She holds a patent entitled as A process for the fabrication of high strength nano bioactive glass in the year 2016.

More Information: Dr. Pragya prepared various nano and micro bioactive glasses using non-freeze drying and freeze drying method. Several Nano bioactive glass (NBG) and composites, porous 3D scaffolds of NBG and the composites were synthesized and studies for their bio-compatibilities. These couples were shown to support the growth of bone cells leading to new bone formation. She also conducted in vivo studies and observed bone healing. NBG was also tested for their use as drug loading systems. She holds a patent entitled as A process for the fabrication of high strength nano bioactive glass in the year 2016.

Dr. Hemant Kumar Singh

Senior Project Manager, NCPRE, IIT Bombay

Ph. D. (2011-2016)

Research Area: Dr. Hemant during his PhD studied the plasmonic effect of silver nanoparticles on front surface of solar cells. Anti-reflection effect of these nanoparticles was observed and explained on the basis of presence of input trapping structures. A sandwiched configuration of extended metal absorber layer in between dielectric layers (D-M-D) was studied for its anti-reflection properties.

More Information: Dr. Hemant during his PhD studied the plasmonic effect of silver nanoparticles on front surface of solar cells. Anti-reflection effect of these nanoparticles was observed and explained on the basis of presence of input trapping structures. A sandwiched configuration of extended metal absorber layer in between dielectric layers (D-M-D) was studied for its anti-reflection properties.

Dr. Paresh G. Kale

Assistant Professor, Electrical Engineering Department, NIT Rourkela

Ph. D. (2013)

Research Area: Dr. Paresh synthesized quantum dots from freestanding porous silicon films. These silica quantum dots were used to prepare Si QD solar cell. The effects like quantum confinement and surface modification were observed. Various cell parameters measured, improved EQE was found in most wavelength region as compared to c-Si cell.

More Information: Dr. Paresh synthesized quantum dots from freestanding porous silicon films. These silica quantum dots were used to prepare Si QD solar cell. The effects like quantum confinement and surface modification were observed. Various cell parameters measured, improved EQE was found in most wavelength region as compared to c-Si cell.

Dr. Suranjan Sen

Working with an NGO

Ph. D.

Research Area: Dr. Suranjan worked on core-shell nanoparticles which were used for wavelength shifting. When the nanoparticles deposited over thin film silicon solar cells, these were found to shift the incoming solar spectrum and boost efficiency in near UV-wavelength range. (ZnS:Mn)ZnS fluorescent nanoparticles were synthesized, characterized and studied for this application.

More Information: Dr. Suranjan worked on core-shell nanoparticles which were used for wavelength shifting. When the nanoparticles deposited over thin film silicon solar cells, these were found to shift the incoming solar spectrum and boost efficiency in near UV-wavelength range. (ZnS:Mn)ZnS fluorescent nanoparticles were synthesized, characterized and studied for this application.

Teams

# Team Name Member