Electrochemical dilatometer for the measurement of height changes in aqueous electrolytes with nanometer resolution

  Discover the new ECD-4-nano, the highly improved successor of the ECD-3 series!

  • Highly improved cycling stability due to redesigned sealing concept
  • Capacitive displacement sensor (range 250 μm, resolution ≤ 5 nm)
  • Additional gas pressure (0 to 3 bar) and temperature sensor (-20 to 80° C)
  • Cableless connection via PAT socket, with electronic cell tag (PAT-Button)
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Watch your electrodes breathing

The ECD-3-aqu is a research grade instrument dedicated to the measurement of charge-induced strain (expansion and shrinkage) of electrodes down to the sub-micrometer range. The ECD-3-aqu is particularly developed for the investigation of Li-ion battery and other insertion-type electrodes. It is specialized for the use with aqueous electrolyte solutions.

The ECD-3-aqu is the result of more than 10 years experience in this field. The heart of the ECD-3-aqu is an electrochemical cell, which is hermetically tight against ambient atmosphere. The two electrodes inside are separated by a stiff glass frit, which is fixed in position. The upper (working) electrode is sealed through a thin metal membrane, which transmits any charge-induced height change to the sensor/load unit on the top.

A high-resolution displacement transducer detects dimensional changes ranging from a few up to 500 micrometers during an experiments, which can take between a few seconds and many days. A simple weight serves to adjust the load on the working electrode. The potential of the working electrode can either be controlled against the counter electrode (cell voltage control) or against an additional reference electrode. The cell components in media contact are made of gold and PEEK.

ECD-3-nano overview

Height 265 mm
Width 100 mm
Depth 110 mm
Weight 2.7 kg
Separator diameter 12 mm
Working (upper) electrode diameter 10 mm
Counter (lower) electrode diameter 12 mm
Displacement sensor system LVDT (Linear Variable Differential Transformer)
Displacement range 500 μm
Displacement resolution better than 50 nm
Test specimen Electrode films
Load on test specimen approx. 1 N
Chemical compatibility Aqueous electrolytes
Cell electrolyte volume approx. 0.5 ml
Temperature resistance -20 to +70 °C (Cell and Sensor)
0 to +40 °C (Conditioning electronics and data logger)

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