Dr. Apurba Ray received his Ph.D. degree (2019) from the Department of Instrumentation Science at Jadavpur University, Kolkata in India. Currently, he is working as a DLR/DAAD Post-doctoral researcher at the Institute of Materials Research, German Aerospace Center (DLR), Cologne, Germany. His major research interest is focused on the fabrication of advanced, cost-effective, eco-friendly, high-performance electrode and electrolyte materials for electrochemical energy storage devices (Supercapacitors and Batteries) to be applied in large-scale aerospace, industrial, domestic, electronic and mobile applications. To date, he has published 34 research papers and 3 book chapters in different reputed International Journals.

Dr. Bilge Saruhan is a material scientist with a PhD degree from the University of Limerick in Ireland and Lecturing Qualification (Habilitation in German) from the University of Freiberg in Germany on high-performance functional ceramics and on nanomaterials and technologies. Prior to her PhD, she worked in the Turkish Automotive Industry as a quality-control engineer. She was awarded as Senior Scientist in 2019. Currently, she is the deputy head of the department High-Temperature and Functional Coatings and leads the Functional Coatings Group activities at the Institute of Materials Research of the German Aerospace Center (DLR) in Cologne. Her research fields cover thin film gas sensor materials and devices, energy storage systems and the development of catalysts and functional nanostructured coatings for energy applications. To date, she has published 126 papers, edited one book and holds nine patents.