The fuel cell is an interesting form of powertrain, because of the high degree of efficiency with which it converts hydrogen into electricity. Fuel cells are also silent, of course, and have no emissions. At TNO, we are researching ways to extend the life of fuel cells, which is important given their currently high purchase price. We are conducting this research in relation to the existing PEM technology, but are also now actively involved in designing a control platform for a new technology called SOFC.