Hydrogen for energy storage

What is hydrogen energy storage?

Hydrogen energy storage is one of the most popular chemical energy storage . Hydrogen is storable, transportable, highly versatile, efficient, and clean energy carrier . It also has a high energy density. As shown in Fig. 15, for energy storage application, off peak electricity is used to electrolyse water to produce hydrogen.

What are the benefits of hydrogen storage?

4. Distribution and storage flexibility: hydrogen can be stored and transported in a variety of forms, including compressed gas, liquid, and solid form . This allows for greater flexibility in the distribution and storage of energy, which can enhance energy security by reducing the vulnerability of the energy system to disruptions.

How is hydrogen stored?

In the former case, the hydrogen is stored by altering its physical state, namely increasing the pressure (compressed gaseous hydrogen storage, CGH 2) or decreasing the temperature below its evaporation temperature (liquid hydrogen storage, LH 2) or using both methods (cryo-compressed hydrogen storage, CcH 2).

Are hydrogen storage technologies sustainable?

The outcomes showed that with the advancements in hydrogen storage technologies and their sustainability implications, policymakers, researchers, and industry stakeholders can make informed decisions to accelerate the transition towards a hydrogen-based energy future that is clean, sustainable, and resilient.

Can hydrogen be used for electricity storage?

During the discharge phase, the stored hydrogen is either used in fuel cell or burnt directly to produce electricity. One major drawback in using hydrogen for electricity storage is the substantial energy losses during a single cycle .

Why is hydrogen a potential energy storage medium?

Hydrogen offers a potential energy storage medium because of its versatility. The gas can be produced by electrolysis of water, making it easy to integrate with electricity generation. Once made, the hydrogen can be burned in thermal power plants to generate electricity again or it can be used as the energy source for fuel cells.