Sustainable mobility includes various measures to reduce CO2 emissions, such as car sharing, expanding public transport as well as the principle of having short distances. Also the digital automation and networking of vehicles are central. Especially important is the further development of alternative drive systems such as battery and fuel cells. Although the market share of electric and hybrid vehicles rose from 1.8 % to 2.6 % by mid-2019, the limited range, high acquisition costs and regional gaps in the charging infrastructure require further technical innovations and new scientific approaches. At Fraunhofer ISE, we therefore conduct transdisciplinary research on new technologies for the sustainable mobility of tomorrow, taking all drive systems into account.