Modern energy storage systems are an important building block for a climate-friendly future. "Modern" means not only that their performance meets the demands of a high-tech society, but also that they can be produced and recycled sustainably. In the search for new resources, scientists sometimes hit upon surprising raw materials - for example brewery waste. Chemists at Friedrich Schiller University Jena, together with Spanish colleagues, have tested brewer’s spent grain as a bio-source to produce materials for electrochemical energy storage systems. They obtained carbon, which can be used as an electrode in batteries, and activated carbon as an electrode material for supercapacitors. ...
