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[email protected] Hong_06a_SC.docx ACCEPTED MANUSCRIPT 22/11/2019 Powering the Future through Hydrogen and Polymer Electrolyte Membrane Fuel Cells Bo Ki Hong*, Sae Hoon Kim, and Chi Myung Kim Fuel Cell Center, R&D Division, Hyundai Motor Company, 17-5, Mabuk-ro 240 Beon-gil, Giheung-gu, Yongin-si, Gyeonggi-do, 16891, Republic of Korea Abstract To date, the world has been making a massive shift away from fossil fuels towards cleaner energy sources. For the past decade, polymer electrolyte membrane fuel cells (PEMFCs) powered by hydrogen have attracted much attention as a promising candidate for eco-friendly vehicles, i.e., fuel cell electric vehicles (FCEVs), owing to their high power density, high efficiency, and zero emission features. Since the world’s first mass production of Tucson ix35 FCEV by Hyundai in 2013, global automotive original equipment manufacturers have focused on commercializing FCEVs.