Multifunctional analysis of coated electrodes

When testing coated electrodes and prototypical cell stacks , characterization of the materials and components is important to ensure their efficiency, performance and service life for the long term. These characteristic values are of critical importance for research and development as well as quality assurance purposes. ZwickRoell has therefore developed the Multifunctional Cell Component Analyzer (MCCA) . With the use of three high-precision linear displacement transducers and a leveling device, pressure can be applied precisely to a surface of the electrode. This enables measurement of the change in thickness of the electrode under realistic compressive conditions . At the same time, the electrical resistance is measured via gold-plated compression platens, which allows an evaluation to be carried out dependent on the pressure. During the electrical charging and discharging process, the cell swells and shrinks, known as battery swelling. This leads to changes in pressure on the individual components. The MCCA test fixture allows you to run highly precise battery swelling tests on prototypical primary cells such as coin cells , for example, and helps to accurately characterize the behavior in the charging and discharging cycle of the smallest repeating cell component stack in the jelly roll .