Figure 2.

Insertion setup of an 18,650 cell with temperature sensor, fixation of the cell with a string, and constant stirring of the liquid (top left); Overview of simultaneous tests, the colours of the liquids indicate either the different duration of tests or different insertion media (top right); The collection of filtered liquid in Polyethylene bottles with the lid after the experiment; the components of the liquid already precipitated to the bottom (bottom left); Filtered and shaken liquid in Polyethylene bottle prepared for chemical analysis (bottom right).