Hydrogen has long been seen as a promising answer for cleaner transport. It is abundant, clean at the point of use, and highly attractive for long-range and heavy-duty applications. So why has hydrogen mobility still not scaled the way many expected?
The answer is not just hydrogen production. The probably bigger issue is hydrogen storage. If hydrogen cannot be stored and transported, hydrogen mobility will stay expensive, difficult to scale, and hard to integrate into everyday transport systems. At H2MOF, we believe the future of hydrogen mobility depends on better hydrogen storage technology.
Why does hydrogen mobility matter?
Hydrogen mobility matters because some parts of transport are very hard to electrify with batteries alone. Passenger vehicles in cities may work well with battery-electric systems, but heavy-duty trucks, long-distance buses, shipping, and other demanding applications often need a different solution.
That is where hydrogen comes in. Hydrogen can enable long range and fast refueling for mobility applications where uptime, payload, and space are key. In that sense, hydrogen mobility is especially relevant for sectors where batteries reach their limits.
Learn more about hydrogen’s potential for cleaner mobility in our white paper: The Future of Hydrogen Mobility
If hydrogen is so promising, why has hydrogen mobility not taken off yet? A lot of people assume hydrogen is expensive mainly because production is expensive. In reality, a large share of the final cost comes from infrastructure, logistics, and hydrogen storage. A 2019 Argonne National Laboratory study found that as much as 85% of the total cost is linked to infrastructure, with station costs accounting for 50% and distribution logistics for another 35%.
What hydrogen storage technologies are used today?
Today, most hydrogen storage technologies rely on either compressed hydrogen gas or cryogenic liquid hydrogen.
Compressed hydrogen is stored in a high-pressure hydrogen tank, often at pressures of up to 700 bar. This is currently one of the most common approaches for hydrogen mobility, but it comes with drawbacks. A 700-bar hydrogen storage tank requires significant energy for compression and costly safety measures.
Liquid hydrogen offers another option. Here hydrogen is cooled to around –253 °C and stored in a cryogenic hydrogen fuel tank. This improves density, but also comes with high energy demand, boil-off losses, and expensive infrastructure.
Both of these forms of hydrogen storage are technically proven and established, but also face strong limitations, holding back a wider adoption of hydrogen mobility. One of the most promising new approaches in hydrogen storage technology is solid-state hydrogen storage using nano-engineered reticular materials. Instead of relying on high-pressure compression or cryogenic liquefaction, these materials can adsorb hydrogen at low pressure and at near-ambient temperature.
What are reticular materials?
Reticular materials are highly ordered, crystalline materials made by connecting molecular building blocks into predictable framework structures. Sounds complicated? Well, you can think of it like stitching LEGO pieces together at the molecular level. This atomic precision enables scientists to engineer these materials for very specific applications such as hydrogen storage tanks.
Why are reticular materials so promising for hydrogen mobility? Reticular materials open up a completely new way of thinking about hydrogen storage. Instead of relying only on extreme compression or cryogenic cooling, these highly porous materials can store hydrogen in solid-state inside their cavities through adsorption. That creates the possibility of building a hydrogen storage tank that works at low pressure and near-ambient temperature, which could make hydrogen mobility much more practical and safe.
How does hydrogen storage based on reticular materials compare to conventional hydrogen storage technology?
Solid state hydrogen storage based on reticular materials offers a fundamentally different approach compared to conventional hydrogen storage technology. Instead of relying on a high-pressure hydrogen tank or a cryogenic hydrogen fuel tank, reticular materials can store hydrogen in solid state through adsorption inside their pores. This means hydrogen can be stored at much lower pressure and near-ambient temperature, reducing the energy input, safety measures, and infrastructure complexity associated with conventional compressed or liquid hydrogen systems.
That difference is especially important for hydrogen mobility. A conventional hydrogen storage tank operating at 700 bar requires significant energy and costly engineering, while cryogenic liquid hydrogen demands extreme cooling, comes with boil-off losses, and needs highly specialized equipment. Reticular materials could avoid many of these drawbacks by enabling more efficient hydrogen storage under much milder conditions. This opens the door to safer, lighter, and more practical hydrogen tank designs for vehicles.
What are the main advantages of solid state hydrogen storage based on reticular materials?
In the context of hydrogen storage, reticular materials offer several major advantages. First, they can enable high volumetric and gravimetric storage densities, which is essential for making hydrogen storage more practical in mobility applications. In simple terms, the materials can be nano-engineered to store hydrogen molecules in their vast number of pores.
Second, reticular materials make it possible to store hydrogen at lower pressure and near-ambient temperature. That is a major difference from conventional hydrogen storage technology, which often depends on either high-pressure hydrogen tanks or cryogenic liquid hydrogen. Operating under milder conditions improves safety, reduces engineering complexity, and lowers energy demand.
Another important advantage is that reticular materials can support safer and more compact hydrogen storage tank designs. Because the system does not have to rely on extreme pressure or extremely low temperatures, it opens the door to hydrogen tanks that are easier to integrate into vehicles and other applications. At the same time, these materials can reduce energy consumption during both fueling and storage, which is a key step toward more efficient hydrogen storage and therefore a wider adoption of hydrogen mobility.
