Test cell for optical characterization in the reflective mode.

The ECC-Opto-10 test cell is an advanced next generation battery test cell. It is designed for operando characterization of electrodes using optical methods such as light microscopy or Raman spectroscopy in reflection mode.

A newly developed sealing concept utilizing laser-welded glass-to-metal electrode feedthroughs and foil seals substantially increases cycle stability compared to the previous generation. The much more compact and low profile design allows use under a wide range of microscopes. We further optimized the cell design for easy assembly. Dedicated sample holders for side-by-side and sandwich arrangements of electrodes vastly improve the handling.

The ECC-Opto-10 is connected to the battery tester via 2 mm cell cable with banana plugs. It can be used with the PAT-Tester-x-8 as well as potentiostats and battery testers from third-party manufacturers.

ECC-Opto-Std overview


High cycling stability due to improved sealing concept

Dedicated sample holders for different electrode arrangements available

Fast assembly and dismantling and easy cleaning of cell components

Electrodes are easily accessible for post-mortem analysis

Low cell height of 21.5 mm for trouble-free use under many light microscopes

Fits well on standard microscope sample stages (76 × 26 mm (DIN ISO 8037-1))

ECC-Opto-10 User Manual
Release 1.0
Type PDF
Size 2 MB
Delivery scope
Spare parts

Spare parts

Test cell

Lid assembly

Sample test results

The picture shows two lithium metal electrodes – 20 µm lithium foil laminated on copper foil – beneath the sapphire window of the test cell. The electrodes are embedded into a glass fiber separator soaked with electrolyte. Applying a current of 20 µA for 5 hours makes the lithium to dissolve from the supporting copper foil (right electrode) and to plate as dendrites on the opposite side (left electrode).

The picture shows two graphite electrodes embedded in a glass fiber separator soaked with electrolyte. The graphite electrode on the left is being lithiated from the lithium metal electrode below the separator. From the color change, one can infer the lithiation gradient within the graphite electrode. The right graphite electrode can be used in a follow-up experiment to send lithium ions back and forth between the two graphite strips.


Assembling the ECC-Opto-10 (06/202)

In this video, Dr. Matthias Hahn shows the assembly of the ECC-Opto-10 inside the glovebox environment.


Recommended tools


High Precision Cutting Tool eliminates torn and chipped electrode edges. The recommended size for use with the ECC-Opto-Std is 10 mm.

Product details


Punching tool for lithium foil. The recommended size for use with the PAT-Cell-Opto-10 is 10 mm.

Product details

Related products


Advanced PAT series test cell for optical characterization in the reflective mode.

Product details


Fully featured potentiostat / galvanostat / impedance analyzer with up to 8 channels for small scale and special purpose testing.

Product details


Test cell for optical characterization of gas diffusion electrodes in metal-air batteries.

Product details

Request a quote

    Form of address

    Your name (required)

    Your company

    Your email address (required)

    Your message


    We are using cookies to give you the best experience on our site. By continuing to use our website without changing the settings, you are agreeing to our use of cookies. More Info

    The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.