Soec water electrolysis hydrogen energy storage

Are solid oxide electrolysis cells a viable source of hydrogen?

Solid oxide electrolysis cells (SOECs) represent a crucial stride toward sustainable hydrogen generation, and this review explores their current scientific challenges, significant advancements, and potential for large-scale hydrogen production.

How does a SOEC module generate hydrogen?

The SOEC module generates hydrogen through the use of high-temperature steam and power . Rather than using a low-temperature electrolysis module that may reduce power consumption but requires more thermal energy (at a relatively low energy level), a high-temperature electrolysis module is used .

What is the operating mechanism of oxide-conducting solid oxide electrolysis cell (O-SOEC)?

The operating mechanism of oxide-conducting solid oxide electrolysis cell (O-SOEC) is the reverse of oxide-conducting solid oxide fuel cell (O-SOFC) as presented in Fig. 4. The cathode and anode are designated as the hydrogen and air electrode, respectively.

Which electrolyte generates two electrolysis products in a hybrid SOEC?

Electrolytes that have both hydrogen as well as oxygen ions on one side of the cell can generate two electrolysis products, hydrogen and oxygen, in hybrid SOECs. Water electrolysis occurred at the two electrodes of hybrid SOECs, where this electrolyte was first introduced.

Will SOEC become the electrolysis technology of choice?

SOEC will not become the electrolysis technology of choice unless the total cost of ownership (cost of 1 kg H2) is brought down to a lower level than that achievable by alkaline or PEM electrolyzers. On the SOEC system and overall plant level, reliability of components other than the stack remains a challenge.

Why is SOEC a good choice for a large-scale hydrogen production?

In the case of SOEC, there lies the scope for large-scale hydrogen production as the stack size can be scaled up to MW range. Besides generating hydrogen from H 2 O, SOEC provides the advantage of H 2 production from NH 3, converting CO 2 /CO to value-added chemicals and converting CH 4 and C 2 H 6 to olefins.