The transition to a sustainable energy system requires the deployment of new, efficient technologies for the conversion of greenhouse-gas-free secondary energy carriers produced from renewable energy sources. IEK-14 has been newly formed from the long-established IEK-3 and, with more than 20 years of experience in electrochemical energy conversion, is at the forefront of these efforts. In collaboration with national and international partners from research and industry, we develop solutions for mobile, portable, and stationary applications, and conduct research into using liquid energy carriers as fuels as well as producing and using them in an efficient, environmentally compatible manner. In addition, we work on groundbreaking innovations for electrochemical conversion systems for the direct generation of hydrogen, syngas, and power by means of electrolysis, co-electrolysis, and fuel cells. All this is realized in close collaboration with the new Institute of Techno-economic Systems Analysis (IEK-3).