Nagano, Japan, 29th October 2025 – Hioki E.E. Corporation is proud to announce the release of the ALDAS-α (Aldas Alpha), an advanced Electrochemical Impedance Spectroscopy (EIS) measurement system engineered for the research and development of electrolysis cells and fuel cells. The new ALDAS-α accelerates the cell’s performance evaluation by providing high-precision impedance measurements, empowering researchers to drive the innovation for a sustainable society fueled by hydrogen.
 

Development Background

 In the global race to achieve carbon neutrality, hydrogen has emerged as a key element in the world’s energy transition. According to estimates from the International Energy Agency (IEA), global hydrogen demand is expected to reach approximately 100 million tons in 2025¹, underscoring the growing importance of hydrogen in achieving carbon neutrality.

 Hydrogen holds great potential across various sectors—from mobility applications such as automobiles and shipping to serving as an alternative means of energy storage and power generation through co-firing²—all contributing to the reduction of carbon dioxide emissions.
 

• 1: Global Hydrogen Review 2025 – Analysis, IEA
• 2: Co-firing refers to a technology used in thermal power generation in which hydrogen is mixed with conventional fuel, helping reduce CO₂ emissions

 The ALDAS-α is designed to support the research and development of both electrolysis cells for hydrogen production and fuel cells that generate electricity from hydrogen. In R&D settings, the system uses the EIS method to perform impedance measurement under various conditions to evaluate the internal states and identify degradation factors.

 Improving the performance of electrolysis cells and fuel cells requires detailed material-level evaluation, such as the analysis of catalysts and polymer electrolyte membranes. EIS measurement plays a key role in clarifying the relationship between factors such as the amount of precious metal loading on catalysts, the type of polymer membrane used, and the resulting overall cell performance.

 The new ALDAS-α complements the ALDAS-Mini, an Electrolysis Cell Analyzer launched in February 2025, engineered for evaluating large electrolysis cells and stacks. With the introduction of the ALDAS-α for smaller, R&D-focused cells, Hioki’s ALDAS-series now supports the measurement needs across the development stages, from fundamental research to larger-scale demonstration studies. 
 

Key Features

1. Improved Evaluation Cycle

 ALDAS-α reduces measurement time by up to 75% compared to the conventional electrochemical measurement instruments. While the conventional EIS measurement test requires more than 30 minutes per measurement, ALDAS-α completes them in approximately 7.6 minutes³. This significant time reduction in measurement boosts R&D productivity and allows researchers to conduct more experiments with greater speed.

• 3: Depending on measurement conditions

2. Measurement in High Current Density Regions

 The ALDAS-α can apply up to DC 20 A from its main unit, eliminating the cost and complexity of an external booster power supply. This integrated capability is essential for testing cells in the high current density regions required by next-generation designs.

3. Easy Connection to Existing Equipment

 ALDAS-α connects to existing evaluation setups without requiring any modifications. This seamless integration minimizes preparation time, allowing researchers to move from installation to data collection in minutes.

4. Simultaneous Measurement of Multiple Cells

 The ALDAS-α supports simultaneous measurement of up to eight cells within a cell stack, enabling a direct comparative evaluation of individual cell performance.

Main Applications

• Small-scale cells evaluation (approximately 1 cm² to 5 cm²) under high current density conditions
• Open-circuit voltage (OCV) measurement for fuel cells under no-load conditions or in a quiescent state
• Accelerated degradation testing of cells
• Ohmic resistance monitoring during long-term durability tests

Link

For more information, please refer to ALDAS-α website.

Contact us

For inquiries such as quotes, demonstrations, and trial usage, please use Hioki’s contact form for a personalized reply from your closest or most appropriate Hioki representative.

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