Mariana Díaz Vejo defended her doctoral thesis “Development of new high-performance conductive membranes based on polymerized ionic liquids for their use in fuel cells”, developed in the Chemical and Biomolecular Engineering Department of the University of Cantabria, under the supervision of Prof. Inmaculada Ortiz and Dr. Alfredo Ortiz. The evaluation committee was formed by Prof. Dr. Isabel María Marucho (University of Lisbon), Dr. Eugenio Daniel Gorri (University of Cantabria) and Dr. Rebeca Marcilla (IMDEA Energy Institute).