Hybrid Flow Batteries Based on Ink Cartridges with Spectacular Colour Changes

The following article shows how a simple construction of a hybrid flow battery can be realised with medical technology materials. The implementation of this future-oriented topic is an example of a curricular innovation and should already be included in school curricula, since future generations will have to deal intensively with the energy transition (not only in Germany) and renewable energies. An electrolyte based on ink cartridges was used to motivate the pupils. The use of this 'everyday chemical' creates a real life reference for the students in the classroom, which can increase the popularity of chemistry teaching.