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Battery

The colloquial term “battery” commonly refers to a secondary, i.e. rechargeable, galvanic cell and here also mostly to the lithium-ion battery (LIB).

In this type of cell, lithium ions are reversibly exchanged between a negative electrode or anode (usually graphite) and a positive electrode or cathode (lithium transition metal oxides). A porous separator membrane and an organic electrolyte solution complete the cell structure. Behind the four main components of a battery, or LIB, there are complex interrelationships and the scope for development is immense.

With a large selection of battery testers, multi-channel potentiostats and other measuring systems related to battery research, we cover numerous testing aspects. We find a suitable measurement system for every problem:

  • Basic research: Current <1 mA, Swagelok or button cells, EIS, high measuring accuracy despite small currents: PalmSens MultiPalmSens4, Ivium Octostat or Ivicycle
  • Characteristic value determination/quality assurance: Current mA to A, button, pouch and cylindrical cells, high measurement throughput: Neware BTS-4000
  • Flexible, special measurements with unusual requirements: MaterialsMates MM500 Vario family: up to 90 V, 500 W, EIS up to 20 kHz (per channel).
  • Climate and safety chambers: LXInstruments, MaterialsMates, Neware
IVIUM IviCycle: 32 channels DC/EIS up to 5 A.

 

 

In addition to the characterisation of battery half and full cells, we also offer measurement systems for tests on individual components or for redox flow batteries (RFB). RFB is a special type of battery in which the charge is exchanged via the electrolyte solution.

Scribner 857 redox flow battery test system with two reservoir bottles, pumps and potentiostat.

Specifically, two electrolytes in different states of charge are oxidised or reduced in the redox flow cell, separated by a membrane, thus generating a current flow. Used electrolyte is removed by a pump and fresh electrolyte is fed in, ensuring quasi-continuous operation. For research and development regarding potential electrolytes and membranes, the all-in-one 857 system by Scribner Associates is the ideal companion. The full RFB setup allows cells to be charged and discharged at up to 20 A, as well as tested with EIS. With the help of a state-of-charge cell, the state of charge of the electrolytes can be monitored continuously.

Another important field of research in the batteries sector is solid-state batteries or all-solid-state batteries (ASSB), in which a solid electrolyte is used with the aim of greatly reducing safety, performance and costs in the future. Solid electrolytes, mostly ceramic in nature, can be tested with regard to numerous physical parameters using the Scribner 740 membrane tester. The membrane tester is also suitable for new types of separator membranes.