New harmonized test protocol for high-temperature steam electrolysis

The Joint Research Centre (JRC) of the European Union has developed a new, harmonized test protocol for high-temperature steam electrolysis (HTE). This protocol can be used to evaluate the performance and durability of electrolysis stacks based on solid oxide cells (SOEC). The focus is on hydrogen production using high-temperature electrolysis (HTEL), which uses electrical energy from renewable sources and industrial waste heat.

The document describes standardized test procedures that are specifically tailored to the requirements of high-temperature steam electrolysis. For example, continuous load tests are carried out to check whether HTE stacks work constantly for more than 1,000 hours. Another example is tests with variable operating profiles that simulate fluctuating feed-in from renewable energy sources. These tests provide objective data that demonstrate technical progress, define research objectives and support technology selection for industrial applications.

A key analysis tool in this context is electrochemical impedance spectroscopy (EIS). EIS makes it possible to detect changes in the resistance behavior of high-temperature electrolytic cells at an early stage - such as signs of material fatigue or degradation - so that countermeasures can be taken in good time.

The SIVONIC EIS meter has been specially optimized for these measurements. It delivers precise and reliable data even under the demanding conditions of high-temperature steam electrolysis.