The samples developed could be placed in high pressure cylinders.
This will lead to an increased amount of stored hydrogen at lower pressures.
This could achieve the possibility of creating a safer and efficient hydrogen storage system.
We are focused on achieving a high adsorption capacity at room temperature, currently we are expecting about ~5 wt.% of hydrogen with Titanium decorations.
Recharge time of these systems is estimated to be less compared to metal hydrides (10-20 min) as adsorption is mainly due to physisorption.
No temperature change required for discharge as these systems are estimated to be pressure driven.
The relative compactness and the relatively low charging pressure as compared with compressed gas cylinders, at this time represents a practical solution.
With current technology, 5 Kg of hydrogen can run fuel cell cars for 500 Km.
And 5Kg of hydrogen gas is currently stored in high compression cylinder at 700 bar.
We are targeting to fabricate a small high-pressure cylinder with a maximum working pressure of 100 bar with 200L capacity storing ~1Kg of gas at room temperature.
To enhance the storage capacity of the cylinder, functionalized graphene samples will be placed inside.
We are targeting to store mass of 2.5 kg in one cylinder; this will require graphene samples of ~5.5 Kg; if the adsorption capacity of the sample achieves 15% gravimetric density. 5.5 Kg of samples will take only 3.2L of space.
We will use two cylinder for on board storage summing to 5Kg for meeting the requirement of 500 Km drive.
Determine the effects of strain, edge and various defects on H2 storage in multilayers of graphene sheets with added functional groups and metal decorations.
Conduct experimental program to prepare samples for hydrogen storage based on the computational and numerical outcomes.
Adsorption isotherms of the prepared samples at Dr. Anil’s Lab at IIT Tirupati.
Fabricate high-pressure Sieverts' type volumetric setup and measure adsorption capacity of prepared samples. (Almost all parts procured, and setup will be fabricated soon)