Challenges on the market Energy storage devices are becoming increasingly important,not just in the industrial field and the automotive sector but also in the field of alternative energies. Modern battery systems for mobile, industrial and stationary applications have to meet high quality and market demands. This creates pressure to develop numerous innovations with a comprehensive range of functions as quickly as possible. Power and energy density, safety, durability and, last but not least, costs have to be optimized in order for a product to survive on the market.……