// Test rigs

Investigation of short stacks on technical scale

• DC current up to 20,000 A
• DC voltage up to 50 V
• DC power up to 460 kW_el
• Stack compartment L x Ø: 2 m x 3,1 m
• Pressure up to 30 bar_g
• Average stack temperature up to 80 °C
• 24-hour operation

Investigation of short and full stacks on technical scale

• DC current up to 5,400 A
• DC voltage up to 150 V
• DC power up to 450 kW_el
• Stack compartment L x Ø: 2 m x 2,6 m
• Pressure up to 30 bar_g
• Average stack temperature up to 80 °C
• Single cell voltage measurement
• 24-hour operation

Examination of stacks and system components on a technical scale in real system environment:

• DC current up to 1,800 A
• DC voltage up to 300 V
• DC power up to 500 kW_el
• Stack compartment L x Ø: 2,6 m x 1,3 m
• Pressure up to 30 bar_g
• Average stack temperature up to 80 °C
• 24-hour operation

Investigation of electrolysis stacks and stack components on technical scale:

• DC current up to 6,000 A
• DC voltage up to 100 V
• DC power up to 200 kW_el
• Stack compartment L x Ø: 1,8 m x 2,5 m
• Pressure up to 30 bar_g
• Average stack temperature up to 80 °C
• Single cell voltage measurement
• 24-hour operation

Investigation of electrolysis stacks and stack components on technical scale:

• Double rectifier with
  - Up to 2.500 A at max. 50 V
  - Up to 5.000 A at max. 25 V
• Stack compartment L x Ø: 1 m x 1,4 m
• Pressure up to 16 bar_g
• Temperature up to 70 °C
• Single cell voltage measurement
• 24-hour operation

Investigation and validation of AEM- and AEL- stacks and components 
(electrode coatings, electrodes, membranes, etc.): 

• DC current up to 1,500 A
• DC voltage up to 100 V
• DC power up to 75 kW_el
• Stack compartment •L x Ø: 1,2 m x 1,5 m
• Pressure up to 30 bar_g
• Temperature up to 90 °C
• Single cell voltage measurement
• 24-hour operation

Investigation and validation of stacks and components (electrode coatings, electrodes, membranes, etc.):

• DC current up to 250 A
• DC voltage up to 64 V
• DC power up to 20 kW_el
• Stack compartment L x Ø: 0,6 m x 0,5 m
• Pressure up to 30 bar_g
• Temperature up to 90 °C
• Single cell voltage measurements and EIS
• 24-hour operation

Investigation and validation of stacks and components (electrode coatings, electrodes, membranes, etc.): 

• DC current up to 340 A
• DC voltage up to 80 V
• DC power up to 10 kW_el
• Pressure up to 16 bar_g
• Temperature up to 90 °C
• Single cell voltage measurement and EIS
• 24-hour operation

Investigation of coated cathodic or anodic single electrodes and membranes in up to 8 measuring cells:

• Active electrode size 3 cm²
• 8 channels with up to 10 A each
• 1 potentiostat available for alternate use for 1 channel for EIS examinations
• Temperature up to 80 °C
• Automated load profile traversing
• 24-hour operation

Investigation of coated cathodic or anodic single electrodes and membranes in a measuring cell:

• Cell voltages comparable to 100 cm² and 5 bar_g
• Active electrode size 3 cm²
• Current densities up to 1,500 mA/cm²
• Temperature up to 80 °C
• Electrochemical impedance spectroscopy (EIS)
• Variation of activation conditions possible

Investigation of coated cathodic or anodic single electrodes in a measuring cell:

• Determination of overpotentials, Tafel slopes and active surface area with a reference electrode
• Active electrode size 1 - 3 cm²
• Current densities up to 1,500 mA/cm²
• Electrochemical impedance spectroscopy (EIS)
• Linear sweep voltammetry (LSV)
• Cyclic voltammetry (CV)
• Variation of activation conditions possible