Energy storage requirements for hydrogen production by water electrolysis

Can water electrolysis be used to produce hydrogen?

Hydrogen production from water electrolysis is a good option to make full use of the surplus renewable energy. Among various technologies for producing hydrogen, water electrolysis using electricity from renewable power sources shows great promise.

How much hydrogen is produced by electrolysis?

Since the cost of producing hydrogen by this method is currently higher than that of producing it from fossil energy carriers such as natural gas and coal, at present only about 4% of hydrogen requirements are covered by electrolysis.

Is hydrogen a good energy storage medium?

As an energy storage medium, hydrogen has drawn the attention of research institutions and industry over the past decade, motivated in part by developments in renewable energy, which have led to unused surplus wind and photovoltaic power. Hydrogen production from water electrolysis is a good option to make full use of the surplus renewable energy.

What is water electrolysis?

Water electrolysis is the most effective zero-emission hydrogen production technology when utilizing renewable energy as the electricity source. Polymer electrolyte membrane (PEM) water electrolysis using an ion exchange membrane is a high efficiency technology for generating high-purity hydrogen.

Can water electrolysis reduce H2 production cost?

The available electrolyzers should be used inexpensive materials to reduce H 2 production cost. Hydrogen as an energy source has been identified as an optimal pathway for mitigating climate change by combining renewable electricity with water electrolysis systems.

Does water electrolysis produce CO2?

Approximately four billion tons of hydrogen are required annually, with 95% of hydrogen production derived from fossil fuel, which also produces CO2. Water electrolysis powered by renewable energy sources, is expected to enable the scale-up of hydrogen production, and zero CO 2 emissions are produced in water electrolysis processes.